diff --git a/package-lock.json b/package-lock.json
index 1ec1059302d..678cbd8ddde 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -19921,9 +19921,9 @@
       }
     },
     "typescript": {
-      "version": "3.7.2",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.7.2.tgz",
-      "integrity": "sha512-ml7V7JfiN2Xwvcer+XAf2csGO1bPBdRbFCkYBczNZggrBZ9c7G3riSUeJmqEU5uOtXNPMhE3n+R4FA/3YOAWOQ==",
+      "version": "3.8.3",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.8.3.tgz",
+      "integrity": "sha512-MYlEfn5VrLNsgudQTVJeNaQFUAI7DkhnOjdpAp4T+ku1TfQClewlbSuTVHiA+8skNBgaf02TL/kLOvig4y3G8w==",
       "dev": true
     },
     "uglify-js": {
diff --git a/package.json b/package.json
index 298f495290f..622cc7037f4 100644
--- a/package.json
+++ b/package.json
@@ -160,7 +160,7 @@
     "ts-morph": "7.0.0",
     "ts-node": "8.8.1",
     "typeorm": "0.2.24",
-    "typescript": "3.7.2",
+    "typescript": "3.8.3",
     "wrk": "1.2.0",
     "ws": "7.2.3"
   },
diff --git a/sample/01-cats-app/package-lock.json b/sample/01-cats-app/package-lock.json
index c54aefa16f6..d5f309316d9 100644
--- a/sample/01-cats-app/package-lock.json
+++ b/sample/01-cats-app/package-lock.json
@@ -10881,9 +10881,9 @@
       }
     },
     "typescript": {
-      "version": "3.7.2",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.7.2.tgz",
-      "integrity": "sha512-ml7V7JfiN2Xwvcer+XAf2csGO1bPBdRbFCkYBczNZggrBZ9c7G3riSUeJmqEU5uOtXNPMhE3n+R4FA/3YOAWOQ==",
+      "version": "3.8.3",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.8.3.tgz",
+      "integrity": "sha512-MYlEfn5VrLNsgudQTVJeNaQFUAI7DkhnOjdpAp4T+ku1TfQClewlbSuTVHiA+8skNBgaf02TL/kLOvig4y3G8w==",
       "dev": true
     },
     "union-value": {
diff --git a/sample/01-cats-app/package.json b/sample/01-cats-app/package.json
index 0fef8b84d12..172808c1534 100644
--- a/sample/01-cats-app/package.json
+++ b/sample/01-cats-app/package.json
@@ -48,7 +48,7 @@
     "eslint": "6.8.0",
     "eslint-config-prettier": "6.10.1",
     "eslint-plugin-import": "2.20.2",
-    "typescript": "3.7.2"
+    "typescript": "3.8.3"
   },
   "jest": {
     "moduleFileExtensions": [
diff --git a/sample/02-gateways/package-lock.json b/sample/02-gateways/package-lock.json
index 8b7e500677b..55be07715bd 100644
--- a/sample/02-gateways/package-lock.json
+++ b/sample/02-gateways/package-lock.json
@@ -11093,9 +11093,9 @@
       }
     },
     "typescript": {
-      "version": "3.7.2",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.7.2.tgz",
-      "integrity": "sha512-ml7V7JfiN2Xwvcer+XAf2csGO1bPBdRbFCkYBczNZggrBZ9c7G3riSUeJmqEU5uOtXNPMhE3n+R4FA/3YOAWOQ==",
+      "version": "3.8.3",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.8.3.tgz",
+      "integrity": "sha512-MYlEfn5VrLNsgudQTVJeNaQFUAI7DkhnOjdpAp4T+ku1TfQClewlbSuTVHiA+8skNBgaf02TL/kLOvig4y3G8w==",
       "dev": true
     },
     "uid2": {
diff --git a/sample/02-gateways/package.json b/sample/02-gateways/package.json
index c7b5efafe65..44f7040dc61 100644
--- a/sample/02-gateways/package.json
+++ b/sample/02-gateways/package.json
@@ -53,6 +53,6 @@
     "eslint": "6.8.0",
     "eslint-config-prettier": "6.10.1",
     "eslint-plugin-import": "2.20.2",
-    "typescript": "3.7.2"
+    "typescript": "3.8.3"
   }
 }
diff --git a/sample/03-microservices/package-lock.json b/sample/03-microservices/package-lock.json
index f1b3b038e94..a314b054a27 100644
--- a/sample/03-microservices/package-lock.json
+++ b/sample/03-microservices/package-lock.json
@@ -10721,9 +10721,9 @@
       }
     },
     "typescript": {
-      "version": "3.7.2",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.7.2.tgz",
-      "integrity": "sha512-ml7V7JfiN2Xwvcer+XAf2csGO1bPBdRbFCkYBczNZggrBZ9c7G3riSUeJmqEU5uOtXNPMhE3n+R4FA/3YOAWOQ==",
+      "version": "3.8.3",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.8.3.tgz",
+      "integrity": "sha512-MYlEfn5VrLNsgudQTVJeNaQFUAI7DkhnOjdpAp4T+ku1TfQClewlbSuTVHiA+8skNBgaf02TL/kLOvig4y3G8w==",
       "dev": true
     },
     "union-value": {
diff --git a/sample/03-microservices/package.json b/sample/03-microservices/package.json
index 7fd56ede034..3c48f5cf24d 100644
--- a/sample/03-microservices/package.json
+++ b/sample/03-microservices/package.json
@@ -49,6 +49,6 @@
     "eslint": "6.8.0",
     "eslint-config-prettier": "6.10.1",
     "eslint-plugin-import": "2.20.2",
-    "typescript": "3.7.2"
+    "typescript": "3.8.3"
   }
 }
diff --git a/sample/04-grpc/package-lock.json b/sample/04-grpc/package-lock.json
index 61f853d9b12..7c953dad1f0 100644
--- a/sample/04-grpc/package-lock.json
+++ b/sample/04-grpc/package-lock.json
@@ -10970,9 +10970,9 @@
       }
     },
     "typescript": {
-      "version": "3.7.2",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.7.2.tgz",
-      "integrity": "sha512-ml7V7JfiN2Xwvcer+XAf2csGO1bPBdRbFCkYBczNZggrBZ9c7G3riSUeJmqEU5uOtXNPMhE3n+R4FA/3YOAWOQ==",
+      "version": "3.8.3",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.8.3.tgz",
+      "integrity": "sha512-MYlEfn5VrLNsgudQTVJeNaQFUAI7DkhnOjdpAp4T+ku1TfQClewlbSuTVHiA+8skNBgaf02TL/kLOvig4y3G8w==",
       "dev": true
     },
     "union-value": {
diff --git a/sample/04-grpc/package.json b/sample/04-grpc/package.json
index 768bf17626d..2932255311d 100644
--- a/sample/04-grpc/package.json
+++ b/sample/04-grpc/package.json
@@ -50,6 +50,6 @@
     "eslint": "6.8.0",
     "eslint-config-prettier": "6.10.1",
     "eslint-plugin-import": "2.20.2",
-    "typescript": "3.7.2"
+    "typescript": "3.8.3"
   }
 }
diff --git a/sample/05-sql-typeorm/package-lock.json b/sample/05-sql-typeorm/package-lock.json
index 10ca972afae..31fb4d54f32 100644
--- a/sample/05-sql-typeorm/package-lock.json
+++ b/sample/05-sql-typeorm/package-lock.json
@@ -11311,9 +11311,9 @@
       }
     },
     "typescript": {
-      "version": "3.7.2",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.7.2.tgz",
-      "integrity": "sha512-ml7V7JfiN2Xwvcer+XAf2csGO1bPBdRbFCkYBczNZggrBZ9c7G3riSUeJmqEU5uOtXNPMhE3n+R4FA/3YOAWOQ==",
+      "version": "3.8.3",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.8.3.tgz",
+      "integrity": "sha512-MYlEfn5VrLNsgudQTVJeNaQFUAI7DkhnOjdpAp4T+ku1TfQClewlbSuTVHiA+8skNBgaf02TL/kLOvig4y3G8w==",
       "dev": true
     },
     "union-value": {
diff --git a/sample/05-sql-typeorm/package.json b/sample/05-sql-typeorm/package.json
index 01712b75850..6b266aa6cea 100644
--- a/sample/05-sql-typeorm/package.json
+++ b/sample/05-sql-typeorm/package.json
@@ -49,6 +49,6 @@
     "eslint": "6.8.0",
     "eslint-config-prettier": "6.10.1",
     "eslint-plugin-import": "2.20.2",
-    "typescript": "3.7.2"
+    "typescript": "3.8.3"
   }
 }
diff --git a/sample/06-mongoose/package-lock.json b/sample/06-mongoose/package-lock.json
index f139e7e5506..13fc3782b5a 100644
--- a/sample/06-mongoose/package-lock.json
+++ b/sample/06-mongoose/package-lock.json
@@ -10879,9 +10879,9 @@
       }
     },
     "typescript": {
-      "version": "3.7.2",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.7.2.tgz",
-      "integrity": "sha512-ml7V7JfiN2Xwvcer+XAf2csGO1bPBdRbFCkYBczNZggrBZ9c7G3riSUeJmqEU5uOtXNPMhE3n+R4FA/3YOAWOQ==",
+      "version": "3.8.3",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.8.3.tgz",
+      "integrity": "sha512-MYlEfn5VrLNsgudQTVJeNaQFUAI7DkhnOjdpAp4T+ku1TfQClewlbSuTVHiA+8skNBgaf02TL/kLOvig4y3G8w==",
       "dev": true
     },
     "union-value": {
diff --git a/sample/06-mongoose/package.json b/sample/06-mongoose/package.json
index f7e134e5e67..29b4c29745c 100644
--- a/sample/06-mongoose/package.json
+++ b/sample/06-mongoose/package.json
@@ -49,6 +49,6 @@
     "eslint": "6.8.0",
     "eslint-config-prettier": "6.10.1",
     "eslint-plugin-import": "2.20.2",
-    "typescript": "3.7.2"
+    "typescript": "3.8.3"
   }
 }
diff --git a/sample/07-sequelize/package-lock.json b/sample/07-sequelize/package-lock.json
index 9cba7edf46c..9ce3d48f6e1 100644
--- a/sample/07-sequelize/package-lock.json
+++ b/sample/07-sequelize/package-lock.json
@@ -11015,9 +11015,9 @@
       }
     },
     "typescript": {
-      "version": "3.7.2",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.7.2.tgz",
-      "integrity": "sha512-ml7V7JfiN2Xwvcer+XAf2csGO1bPBdRbFCkYBczNZggrBZ9c7G3riSUeJmqEU5uOtXNPMhE3n+R4FA/3YOAWOQ=="
+      "version": "3.8.3",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.8.3.tgz",
+      "integrity": "sha512-MYlEfn5VrLNsgudQTVJeNaQFUAI7DkhnOjdpAp4T+ku1TfQClewlbSuTVHiA+8skNBgaf02TL/kLOvig4y3G8w=="
     },
     "union-value": {
       "version": "1.0.1",
diff --git a/sample/07-sequelize/package.json b/sample/07-sequelize/package.json
index e148232b18b..a8ddeb003aa 100644
--- a/sample/07-sequelize/package.json
+++ b/sample/07-sequelize/package.json
@@ -29,7 +29,7 @@
     "rxjs": "6.5.4",
     "sequelize": "5.21.5",
     "sequelize-typescript": "1.1.0",
-    "typescript": "3.7.2"
+    "typescript": "3.8.3"
   },
   "devDependencies": {
     "@types/sequelize": "4.28.8",
@@ -52,6 +52,6 @@
     "eslint": "6.8.0",
     "eslint-config-prettier": "6.10.1",
     "eslint-plugin-import": "2.20.2",
-    "typescript": "3.7.2"
+    "typescript": "3.8.3"
   }
 }
diff --git a/sample/08-webpack/package-lock.json b/sample/08-webpack/package-lock.json
index 74ac9a40476..d7e3857b0a5 100644
--- a/sample/08-webpack/package-lock.json
+++ b/sample/08-webpack/package-lock.json
@@ -6171,9 +6171,9 @@
       "integrity": "sha1-hnrHTjhkGHsdPUfZlqeOxciDB3c="
     },
     "typescript": {
-      "version": "3.7.2",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.7.2.tgz",
-      "integrity": "sha512-ml7V7JfiN2Xwvcer+XAf2csGO1bPBdRbFCkYBczNZggrBZ9c7G3riSUeJmqEU5uOtXNPMhE3n+R4FA/3YOAWOQ=="
+      "version": "3.8.3",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.8.3.tgz",
+      "integrity": "sha512-MYlEfn5VrLNsgudQTVJeNaQFUAI7DkhnOjdpAp4T+ku1TfQClewlbSuTVHiA+8skNBgaf02TL/kLOvig4y3G8w=="
     },
     "union-value": {
       "version": "1.0.0",
diff --git a/sample/08-webpack/package.json b/sample/08-webpack/package.json
index 795a1edc9e2..4875b0304c3 100644
--- a/sample/08-webpack/package.json
+++ b/sample/08-webpack/package.json
@@ -16,7 +16,7 @@
     "@nestjs/platform-express": "7.0.6",
     "reflect-metadata": "0.1.13",
     "rxjs": "6.5.4",
-    "typescript": "3.7.2"
+    "typescript": "3.8.3"
   },
   "devDependencies": {
     "@types/node": "12.12.31",
diff --git a/sample/10-fastify/package-lock.json b/sample/10-fastify/package-lock.json
index 095491a5e6b..f6d601e4ac2 100644
--- a/sample/10-fastify/package-lock.json
+++ b/sample/10-fastify/package-lock.json
@@ -10620,9 +10620,9 @@
       }
     },
     "typescript": {
-      "version": "3.7.2",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.7.2.tgz",
-      "integrity": "sha512-ml7V7JfiN2Xwvcer+XAf2csGO1bPBdRbFCkYBczNZggrBZ9c7G3riSUeJmqEU5uOtXNPMhE3n+R4FA/3YOAWOQ==",
+      "version": "3.8.3",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.8.3.tgz",
+      "integrity": "sha512-MYlEfn5VrLNsgudQTVJeNaQFUAI7DkhnOjdpAp4T+ku1TfQClewlbSuTVHiA+8skNBgaf02TL/kLOvig4y3G8w==",
       "dev": true
     },
     "union-value": {
diff --git a/sample/10-fastify/package.json b/sample/10-fastify/package.json
index bd2101380d1..2bfef7b5236 100644
--- a/sample/10-fastify/package.json
+++ b/sample/10-fastify/package.json
@@ -48,6 +48,6 @@
     "eslint": "6.8.0",
     "eslint-config-prettier": "6.10.1",
     "eslint-plugin-import": "2.20.2",
-    "typescript": "3.7.2"
+    "typescript": "3.8.3"
   }
 }
diff --git a/sample/11-swagger/package-lock.json b/sample/11-swagger/package-lock.json
index 51bdb42497e..5fc9ac4e9aa 100644
--- a/sample/11-swagger/package-lock.json
+++ b/sample/11-swagger/package-lock.json
@@ -10703,9 +10703,9 @@
       }
     },
     "typescript": {
-      "version": "3.7.2",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.7.2.tgz",
-      "integrity": "sha512-ml7V7JfiN2Xwvcer+XAf2csGO1bPBdRbFCkYBczNZggrBZ9c7G3riSUeJmqEU5uOtXNPMhE3n+R4FA/3YOAWOQ==",
+      "version": "3.8.3",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.8.3.tgz",
+      "integrity": "sha512-MYlEfn5VrLNsgudQTVJeNaQFUAI7DkhnOjdpAp4T+ku1TfQClewlbSuTVHiA+8skNBgaf02TL/kLOvig4y3G8w==",
       "dev": true
     },
     "union-value": {
diff --git a/sample/11-swagger/package.json b/sample/11-swagger/package.json
index 2475b7f0301..e2edc58bf00 100644
--- a/sample/11-swagger/package.json
+++ b/sample/11-swagger/package.json
@@ -49,6 +49,6 @@
     "eslint": "6.8.0",
     "eslint-config-prettier": "6.10.1",
     "eslint-plugin-import": "2.20.2",
-    "typescript": "3.7.2"
+    "typescript": "3.8.3"
   }
 }
diff --git a/sample/12-graphql-schema-first/package-lock.json b/sample/12-graphql-schema-first/package-lock.json
index 8fda1721b32..33868818632 100644
--- a/sample/12-graphql-schema-first/package-lock.json
+++ b/sample/12-graphql-schema-first/package-lock.json
@@ -12032,9 +12032,9 @@
       }
     },
     "typescript": {
-      "version": "3.7.2",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.7.2.tgz",
-      "integrity": "sha512-ml7V7JfiN2Xwvcer+XAf2csGO1bPBdRbFCkYBczNZggrBZ9c7G3riSUeJmqEU5uOtXNPMhE3n+R4FA/3YOAWOQ==",
+      "version": "3.8.3",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.8.3.tgz",
+      "integrity": "sha512-MYlEfn5VrLNsgudQTVJeNaQFUAI7DkhnOjdpAp4T+ku1TfQClewlbSuTVHiA+8skNBgaf02TL/kLOvig4y3G8w==",
       "dev": true
     },
     "unc-path-regex": {
diff --git a/sample/12-graphql-schema-first/package.json b/sample/12-graphql-schema-first/package.json
index b537bb693ec..fc064504f08 100644
--- a/sample/12-graphql-schema-first/package.json
+++ b/sample/12-graphql-schema-first/package.json
@@ -52,6 +52,6 @@
     "eslint": "6.8.0",
     "eslint-config-prettier": "6.10.1",
     "eslint-plugin-import": "2.20.2",
-    "typescript": "3.7.2"
+    "typescript": "3.8.3"
   }
 }
diff --git a/sample/13-mongo-typeorm/package-lock.json b/sample/13-mongo-typeorm/package-lock.json
index dce121ce438..4973d6a36c2 100644
--- a/sample/13-mongo-typeorm/package-lock.json
+++ b/sample/13-mongo-typeorm/package-lock.json
@@ -11279,9 +11279,9 @@
       }
     },
     "typescript": {
-      "version": "3.7.2",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.7.2.tgz",
-      "integrity": "sha512-ml7V7JfiN2Xwvcer+XAf2csGO1bPBdRbFCkYBczNZggrBZ9c7G3riSUeJmqEU5uOtXNPMhE3n+R4FA/3YOAWOQ==",
+      "version": "3.8.3",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.8.3.tgz",
+      "integrity": "sha512-MYlEfn5VrLNsgudQTVJeNaQFUAI7DkhnOjdpAp4T+ku1TfQClewlbSuTVHiA+8skNBgaf02TL/kLOvig4y3G8w==",
       "dev": true
     },
     "union-value": {
diff --git a/sample/13-mongo-typeorm/package.json b/sample/13-mongo-typeorm/package.json
index 82d898af27f..71caf3fd21b 100644
--- a/sample/13-mongo-typeorm/package.json
+++ b/sample/13-mongo-typeorm/package.json
@@ -48,6 +48,6 @@
     "eslint": "6.8.0",
     "eslint-config-prettier": "6.10.1",
     "eslint-plugin-import": "2.20.2",
-    "typescript": "3.7.2"
+    "typescript": "3.8.3"
   }
 }
diff --git a/sample/14-mongoose-base/package-lock.json b/sample/14-mongoose-base/package-lock.json
index dfff61b1d64..83fad32bdb6 100644
--- a/sample/14-mongoose-base/package-lock.json
+++ b/sample/14-mongoose-base/package-lock.json
@@ -10819,9 +10819,9 @@
       }
     },
     "typescript": {
-      "version": "3.7.2",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.7.2.tgz",
-      "integrity": "sha512-ml7V7JfiN2Xwvcer+XAf2csGO1bPBdRbFCkYBczNZggrBZ9c7G3riSUeJmqEU5uOtXNPMhE3n+R4FA/3YOAWOQ==",
+      "version": "3.8.3",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.8.3.tgz",
+      "integrity": "sha512-MYlEfn5VrLNsgudQTVJeNaQFUAI7DkhnOjdpAp4T+ku1TfQClewlbSuTVHiA+8skNBgaf02TL/kLOvig4y3G8w==",
       "dev": true
     },
     "union-value": {
diff --git a/sample/14-mongoose-base/package.json b/sample/14-mongoose-base/package.json
index 4d429014c73..f8f7e8166d2 100644
--- a/sample/14-mongoose-base/package.json
+++ b/sample/14-mongoose-base/package.json
@@ -46,6 +46,6 @@
     "eslint": "6.8.0",
     "eslint-config-prettier": "6.10.1",
     "eslint-plugin-import": "2.20.2",
-    "typescript": "3.7.2"
+    "typescript": "3.8.3"
   }
 }
diff --git a/sample/15-mvc/package-lock.json b/sample/15-mvc/package-lock.json
index 80306bbd063..f5f66f9e4c9 100644
--- a/sample/15-mvc/package-lock.json
+++ b/sample/15-mvc/package-lock.json
@@ -11099,9 +11099,9 @@
       }
     },
     "typescript": {
-      "version": "3.7.2",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.7.2.tgz",
-      "integrity": "sha512-ml7V7JfiN2Xwvcer+XAf2csGO1bPBdRbFCkYBczNZggrBZ9c7G3riSUeJmqEU5uOtXNPMhE3n+R4FA/3YOAWOQ==",
+      "version": "3.8.3",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.8.3.tgz",
+      "integrity": "sha512-MYlEfn5VrLNsgudQTVJeNaQFUAI7DkhnOjdpAp4T+ku1TfQClewlbSuTVHiA+8skNBgaf02TL/kLOvig4y3G8w==",
       "dev": true
     },
     "uglify-js": {
diff --git a/sample/15-mvc/package.json b/sample/15-mvc/package.json
index 5f4dec0f332..964221a16d3 100644
--- a/sample/15-mvc/package.json
+++ b/sample/15-mvc/package.json
@@ -47,6 +47,6 @@
     "eslint": "6.8.0",
     "eslint-config-prettier": "6.10.1",
     "eslint-plugin-import": "2.20.2",
-    "typescript": "3.7.2"
+    "typescript": "3.8.3"
   }
 }
diff --git a/sample/16-gateways-ws/package-lock.json b/sample/16-gateways-ws/package-lock.json
index fe391c74181..a04e1e2c3b2 100644
--- a/sample/16-gateways-ws/package-lock.json
+++ b/sample/16-gateways-ws/package-lock.json
@@ -10724,9 +10724,9 @@
       }
     },
     "typescript": {
-      "version": "3.7.2",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.7.2.tgz",
-      "integrity": "sha512-ml7V7JfiN2Xwvcer+XAf2csGO1bPBdRbFCkYBczNZggrBZ9c7G3riSUeJmqEU5uOtXNPMhE3n+R4FA/3YOAWOQ==",
+      "version": "3.8.3",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.8.3.tgz",
+      "integrity": "sha512-MYlEfn5VrLNsgudQTVJeNaQFUAI7DkhnOjdpAp4T+ku1TfQClewlbSuTVHiA+8skNBgaf02TL/kLOvig4y3G8w==",
       "dev": true
     },
     "union-value": {
diff --git a/sample/16-gateways-ws/package.json b/sample/16-gateways-ws/package.json
index f92c5e76648..85b466e03a4 100644
--- a/sample/16-gateways-ws/package.json
+++ b/sample/16-gateways-ws/package.json
@@ -51,6 +51,6 @@
     "eslint": "6.8.0",
     "eslint-config-prettier": "6.10.1",
     "eslint-plugin-import": "2.20.2",
-    "typescript": "3.7.2"
+    "typescript": "3.8.3"
   }
 }
diff --git a/sample/17-mvc-fastify/package-lock.json b/sample/17-mvc-fastify/package-lock.json
index 0410f74ebc1..449b40ecf8b 100644
--- a/sample/17-mvc-fastify/package-lock.json
+++ b/sample/17-mvc-fastify/package-lock.json
@@ -10347,9 +10347,9 @@
       }
     },
     "typescript": {
-      "version": "3.7.2",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.7.2.tgz",
-      "integrity": "sha512-ml7V7JfiN2Xwvcer+XAf2csGO1bPBdRbFCkYBczNZggrBZ9c7G3riSUeJmqEU5uOtXNPMhE3n+R4FA/3YOAWOQ==",
+      "version": "3.8.3",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.8.3.tgz",
+      "integrity": "sha512-MYlEfn5VrLNsgudQTVJeNaQFUAI7DkhnOjdpAp4T+ku1TfQClewlbSuTVHiA+8skNBgaf02TL/kLOvig4y3G8w==",
       "dev": true
     },
     "uglify-js": {
diff --git a/sample/17-mvc-fastify/package.json b/sample/17-mvc-fastify/package.json
index d934ba2a433..184b860e084 100644
--- a/sample/17-mvc-fastify/package.json
+++ b/sample/17-mvc-fastify/package.json
@@ -50,6 +50,6 @@
     "eslint": "6.8.0",
     "eslint-config-prettier": "6.10.1",
     "eslint-plugin-import": "2.20.2",
-    "typescript": "3.7.2"
+    "typescript": "3.8.3"
   }
 }
diff --git a/sample/18-context/package-lock.json b/sample/18-context/package-lock.json
index fde9ca24882..9276805ab17 100644
--- a/sample/18-context/package-lock.json
+++ b/sample/18-context/package-lock.json
@@ -9915,9 +9915,9 @@
       }
     },
     "typescript": {
-      "version": "3.7.2",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.7.2.tgz",
-      "integrity": "sha512-ml7V7JfiN2Xwvcer+XAf2csGO1bPBdRbFCkYBczNZggrBZ9c7G3riSUeJmqEU5uOtXNPMhE3n+R4FA/3YOAWOQ==",
+      "version": "3.8.3",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.8.3.tgz",
+      "integrity": "sha512-MYlEfn5VrLNsgudQTVJeNaQFUAI7DkhnOjdpAp4T+ku1TfQClewlbSuTVHiA+8skNBgaf02TL/kLOvig4y3G8w==",
       "dev": true
     },
     "union-value": {
diff --git a/sample/18-context/package.json b/sample/18-context/package.json
index fd32380bcfe..7fc514a803f 100644
--- a/sample/18-context/package.json
+++ b/sample/18-context/package.json
@@ -42,6 +42,6 @@
     "eslint": "6.8.0",
     "eslint-config-prettier": "6.10.1",
     "eslint-plugin-import": "2.20.2",
-    "typescript": "3.7.2"
+    "typescript": "3.8.3"
   }
 }
diff --git a/sample/19-auth-jwt/package-lock.json b/sample/19-auth-jwt/package-lock.json
index 391be94ec1c..f0f6726f5bb 100644
--- a/sample/19-auth-jwt/package-lock.json
+++ b/sample/19-auth-jwt/package-lock.json
@@ -12073,9 +12073,9 @@
       }
     },
     "typescript": {
-      "version": "3.7.2",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.7.2.tgz",
-      "integrity": "sha512-ml7V7JfiN2Xwvcer+XAf2csGO1bPBdRbFCkYBczNZggrBZ9c7G3riSUeJmqEU5uOtXNPMhE3n+R4FA/3YOAWOQ==",
+      "version": "3.8.3",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.8.3.tgz",
+      "integrity": "sha512-MYlEfn5VrLNsgudQTVJeNaQFUAI7DkhnOjdpAp4T+ku1TfQClewlbSuTVHiA+8skNBgaf02TL/kLOvig4y3G8w==",
       "dev": true
     },
     "union-value": {
diff --git a/sample/19-auth-jwt/package.json b/sample/19-auth-jwt/package.json
index 28d9069cbde..2d43609164b 100644
--- a/sample/19-auth-jwt/package.json
+++ b/sample/19-auth-jwt/package.json
@@ -52,7 +52,7 @@
     "eslint": "6.8.0",
     "eslint-config-prettier": "6.10.1",
     "eslint-plugin-import": "2.20.2",
-    "typescript": "3.7.2"
+    "typescript": "3.8.3"
   },
   "jest": {
     "moduleFileExtensions": [
diff --git a/sample/20-cache/package-lock.json b/sample/20-cache/package-lock.json
index 5fd45f63040..f5feac0f6ad 100644
--- a/sample/20-cache/package-lock.json
+++ b/sample/20-cache/package-lock.json
@@ -10739,9 +10739,9 @@
       }
     },
     "typescript": {
-      "version": "3.7.2",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.7.2.tgz",
-      "integrity": "sha512-ml7V7JfiN2Xwvcer+XAf2csGO1bPBdRbFCkYBczNZggrBZ9c7G3riSUeJmqEU5uOtXNPMhE3n+R4FA/3YOAWOQ==",
+      "version": "3.8.3",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.8.3.tgz",
+      "integrity": "sha512-MYlEfn5VrLNsgudQTVJeNaQFUAI7DkhnOjdpAp4T+ku1TfQClewlbSuTVHiA+8skNBgaf02TL/kLOvig4y3G8w==",
       "dev": true
     },
     "union-value": {
diff --git a/sample/20-cache/package.json b/sample/20-cache/package.json
index 99fc054e034..1e4c96ef901 100644
--- a/sample/20-cache/package.json
+++ b/sample/20-cache/package.json
@@ -47,6 +47,6 @@
     "eslint": "6.8.0",
     "eslint-config-prettier": "6.10.1",
     "eslint-plugin-import": "2.20.2",
-    "typescript": "3.7.2"
+    "typescript": "3.8.3"
   }
 }
diff --git a/sample/21-serializer/package-lock.json b/sample/21-serializer/package-lock.json
index 95d45d5d6c0..a3a42760832 100644
--- a/sample/21-serializer/package-lock.json
+++ b/sample/21-serializer/package-lock.json
@@ -10667,9 +10667,9 @@
       }
     },
     "typescript": {
-      "version": "3.7.2",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.7.2.tgz",
-      "integrity": "sha512-ml7V7JfiN2Xwvcer+XAf2csGO1bPBdRbFCkYBczNZggrBZ9c7G3riSUeJmqEU5uOtXNPMhE3n+R4FA/3YOAWOQ==",
+      "version": "3.8.3",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.8.3.tgz",
+      "integrity": "sha512-MYlEfn5VrLNsgudQTVJeNaQFUAI7DkhnOjdpAp4T+ku1TfQClewlbSuTVHiA+8skNBgaf02TL/kLOvig4y3G8w==",
       "dev": true
     },
     "union-value": {
diff --git a/sample/21-serializer/package.json b/sample/21-serializer/package.json
index 29bd887ccb0..915911c94b7 100644
--- a/sample/21-serializer/package.json
+++ b/sample/21-serializer/package.json
@@ -46,6 +46,6 @@
     "eslint": "6.8.0",
     "eslint-config-prettier": "6.10.1",
     "eslint-plugin-import": "2.20.2",
-    "typescript": "3.7.2"
+    "typescript": "3.8.3"
   }
 }
diff --git a/sample/22-graphql-prisma/package-lock.json b/sample/22-graphql-prisma/package-lock.json
index 4aa450bdbe8..8cb13428434 100644
--- a/sample/22-graphql-prisma/package-lock.json
+++ b/sample/22-graphql-prisma/package-lock.json
@@ -13126,9 +13126,9 @@
       }
     },
     "typescript": {
-      "version": "3.7.2",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.7.2.tgz",
-      "integrity": "sha512-ml7V7JfiN2Xwvcer+XAf2csGO1bPBdRbFCkYBczNZggrBZ9c7G3riSUeJmqEU5uOtXNPMhE3n+R4FA/3YOAWOQ==",
+      "version": "3.8.3",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.8.3.tgz",
+      "integrity": "sha512-MYlEfn5VrLNsgudQTVJeNaQFUAI7DkhnOjdpAp4T+ku1TfQClewlbSuTVHiA+8skNBgaf02TL/kLOvig4y3G8w==",
       "dev": true
     },
     "unc-path-regex": {
diff --git a/sample/22-graphql-prisma/package.json b/sample/22-graphql-prisma/package.json
index ee4945dd8ef..5afd1a2ba81 100644
--- a/sample/22-graphql-prisma/package.json
+++ b/sample/22-graphql-prisma/package.json
@@ -50,6 +50,6 @@
     "eslint": "6.8.0",
     "eslint-config-prettier": "6.10.1",
     "eslint-plugin-import": "2.20.2",
-    "typescript": "3.7.2"
+    "typescript": "3.8.3"
   }
 }
diff --git a/sample/23-graphql-code-first/package-lock.json b/sample/23-graphql-code-first/package-lock.json
index f9a495988a1..95b46462aff 100644
--- a/sample/23-graphql-code-first/package-lock.json
+++ b/sample/23-graphql-code-first/package-lock.json
@@ -12498,9 +12498,9 @@
       }
     },
     "typescript": {
-      "version": "3.7.2",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.7.2.tgz",
-      "integrity": "sha512-ml7V7JfiN2Xwvcer+XAf2csGO1bPBdRbFCkYBczNZggrBZ9c7G3riSUeJmqEU5uOtXNPMhE3n+R4FA/3YOAWOQ==",
+      "version": "3.8.3",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.8.3.tgz",
+      "integrity": "sha512-MYlEfn5VrLNsgudQTVJeNaQFUAI7DkhnOjdpAp4T+ku1TfQClewlbSuTVHiA+8skNBgaf02TL/kLOvig4y3G8w==",
       "dev": true
     },
     "unc-path-regex": {
diff --git a/sample/23-graphql-code-first/package.json b/sample/23-graphql-code-first/package.json
index 248b1bf869e..9c6eb59c04a 100644
--- a/sample/23-graphql-code-first/package.json
+++ b/sample/23-graphql-code-first/package.json
@@ -51,6 +51,6 @@
     "eslint": "6.8.0",
     "eslint-config-prettier": "6.10.1",
     "eslint-plugin-import": "2.20.2",
-    "typescript": "3.7.2"
+    "typescript": "3.8.3"
   }
 }
diff --git a/sample/24-serve-static/package-lock.json b/sample/24-serve-static/package-lock.json
index 6dc217d278b..821d1bda7e1 100644
--- a/sample/24-serve-static/package-lock.json
+++ b/sample/24-serve-static/package-lock.json
@@ -10667,9 +10667,9 @@
       }
     },
     "typescript": {
-      "version": "3.7.2",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.7.2.tgz",
-      "integrity": "sha512-ml7V7JfiN2Xwvcer+XAf2csGO1bPBdRbFCkYBczNZggrBZ9c7G3riSUeJmqEU5uOtXNPMhE3n+R4FA/3YOAWOQ==",
+      "version": "3.8.3",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.8.3.tgz",
+      "integrity": "sha512-MYlEfn5VrLNsgudQTVJeNaQFUAI7DkhnOjdpAp4T+ku1TfQClewlbSuTVHiA+8skNBgaf02TL/kLOvig4y3G8w==",
       "dev": true
     },
     "union-value": {
diff --git a/sample/24-serve-static/package.json b/sample/24-serve-static/package.json
index f6ccb881feb..b80016d4c57 100644
--- a/sample/24-serve-static/package.json
+++ b/sample/24-serve-static/package.json
@@ -48,6 +48,6 @@
     "eslint": "6.8.0",
     "eslint-config-prettier": "6.10.1",
     "eslint-plugin-import": "2.20.2",
-    "typescript": "3.7.2"
+    "typescript": "3.8.3"
   }
 }
diff --git a/sample/25-dynamic-modules/package-lock.json b/sample/25-dynamic-modules/package-lock.json
index cef58011e8b..d7c08fe8cb7 100644
--- a/sample/25-dynamic-modules/package-lock.json
+++ b/sample/25-dynamic-modules/package-lock.json
@@ -11765,9 +11765,9 @@
       }
     },
     "typescript": {
-      "version": "3.7.2",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.7.2.tgz",
-      "integrity": "sha512-ml7V7JfiN2Xwvcer+XAf2csGO1bPBdRbFCkYBczNZggrBZ9c7G3riSUeJmqEU5uOtXNPMhE3n+R4FA/3YOAWOQ==",
+      "version": "3.8.3",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.8.3.tgz",
+      "integrity": "sha512-MYlEfn5VrLNsgudQTVJeNaQFUAI7DkhnOjdpAp4T+ku1TfQClewlbSuTVHiA+8skNBgaf02TL/kLOvig4y3G8w==",
       "dev": true
     },
     "union-value": {
diff --git a/sample/25-dynamic-modules/package.json b/sample/25-dynamic-modules/package.json
index 4fb0f8c6af8..a2a9cce4b32 100644
--- a/sample/25-dynamic-modules/package.json
+++ b/sample/25-dynamic-modules/package.json
@@ -48,7 +48,7 @@
     "eslint": "6.8.0",
     "eslint-config-prettier": "6.10.1",
     "eslint-plugin-import": "2.20.2",
-    "typescript": "3.7.2"
+    "typescript": "3.8.3"
   },
   "jest": {
     "moduleFileExtensions": [
diff --git a/sample/26-queues/package-lock.json b/sample/26-queues/package-lock.json
index dc53cebe569..facfa95e6ba 100644
--- a/sample/26-queues/package-lock.json
+++ b/sample/26-queues/package-lock.json
@@ -12058,9 +12058,9 @@
       }
     },
     "typescript": {
-      "version": "3.7.2",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.7.2.tgz",
-      "integrity": "sha512-ml7V7JfiN2Xwvcer+XAf2csGO1bPBdRbFCkYBczNZggrBZ9c7G3riSUeJmqEU5uOtXNPMhE3n+R4FA/3YOAWOQ==",
+      "version": "3.8.3",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.8.3.tgz",
+      "integrity": "sha512-MYlEfn5VrLNsgudQTVJeNaQFUAI7DkhnOjdpAp4T+ku1TfQClewlbSuTVHiA+8skNBgaf02TL/kLOvig4y3G8w==",
       "dev": true
     },
     "union-value": {
diff --git a/sample/26-queues/package.json b/sample/26-queues/package.json
index 70415d36146..85a49b5bc3e 100644
--- a/sample/26-queues/package.json
+++ b/sample/26-queues/package.json
@@ -51,7 +51,7 @@
     "eslint": "6.8.0",
     "eslint-config-prettier": "6.10.1",
     "eslint-plugin-import": "2.20.2",
-    "typescript": "3.7.2"
+    "typescript": "3.8.3"
   },
   "jest": {
     "moduleFileExtensions": [
diff --git a/sample/27-scheduling/package-lock.json b/sample/27-scheduling/package-lock.json
index 58ea0ca2d76..c68c06ae39a 100644
--- a/sample/27-scheduling/package-lock.json
+++ b/sample/27-scheduling/package-lock.json
@@ -11820,9 +11820,9 @@
       }
     },
     "typescript": {
-      "version": "3.7.2",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.7.2.tgz",
-      "integrity": "sha512-ml7V7JfiN2Xwvcer+XAf2csGO1bPBdRbFCkYBczNZggrBZ9c7G3riSUeJmqEU5uOtXNPMhE3n+R4FA/3YOAWOQ==",
+      "version": "3.8.3",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.8.3.tgz",
+      "integrity": "sha512-MYlEfn5VrLNsgudQTVJeNaQFUAI7DkhnOjdpAp4T+ku1TfQClewlbSuTVHiA+8skNBgaf02TL/kLOvig4y3G8w==",
       "dev": true
     },
     "union-value": {
diff --git a/sample/27-scheduling/package.json b/sample/27-scheduling/package.json
index e57bbd32acf..aa5c3845f59 100644
--- a/sample/27-scheduling/package.json
+++ b/sample/27-scheduling/package.json
@@ -50,7 +50,7 @@
     "eslint": "6.8.0",
     "eslint-config-prettier": "6.10.1",
     "eslint-plugin-import": "2.20.2",
-    "typescript": "3.7.2"
+    "typescript": "3.8.3"
   },
   "jest": {
     "moduleFileExtensions": [