diff --git a/package-lock.json b/package-lock.json
index c11d9a714a0..2275569dcdb 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -20630,9 +20630,9 @@
       }
     },
     "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 571c9bfad77..ce82cb0a99a 100644
--- a/package.json
+++ b/package.json
@@ -160,7 +160,7 @@
     "ts-morph": "7.0.0",
     "ts-node": "8.7.0",
     "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 f96b0fe33ae..5f28b267c55 100644
--- a/sample/01-cats-app/package-lock.json
+++ b/sample/01-cats-app/package-lock.json
@@ -11074,9 +11074,9 @@
       }
     },
     "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 0c13ea0ef87..b2f3ead889f 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": "6.10.0",
     "eslint-plugin-import": "2.20.1",
-    "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 ccedd62d967..eb2766ba110 100644
--- a/sample/02-gateways/package-lock.json
+++ b/sample/02-gateways/package-lock.json
@@ -10986,9 +10986,9 @@
       }
     },
     "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 8a6ba7840df..2d59d890250 100644
--- a/sample/02-gateways/package.json
+++ b/sample/02-gateways/package.json
@@ -53,6 +53,6 @@
     "eslint": "6.8.0",
     "eslint-config-prettier": "6.10.0",
     "eslint-plugin-import": "2.20.1",
-    "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 7a3c7204dfb..b735abc859d 100644
--- a/sample/03-microservices/package-lock.json
+++ b/sample/03-microservices/package-lock.json
@@ -10632,9 +10632,9 @@
       }
     },
     "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 204a3cf1281..4fadb2d4857 100644
--- a/sample/03-microservices/package.json
+++ b/sample/03-microservices/package.json
@@ -49,6 +49,6 @@
     "eslint": "6.8.0",
     "eslint-config-prettier": "6.10.0",
     "eslint-plugin-import": "2.20.1",
-    "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 3ef081369b0..a5ad4c30c96 100644
--- a/sample/04-grpc/package-lock.json
+++ b/sample/04-grpc/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/04-grpc/package.json b/sample/04-grpc/package.json
index f7d2f01f4e5..86342c679ef 100644
--- a/sample/04-grpc/package.json
+++ b/sample/04-grpc/package.json
@@ -50,6 +50,6 @@
     "eslint": "6.8.0",
     "eslint-config-prettier": "6.10.0",
     "eslint-plugin-import": "2.20.1",
-    "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 e21f6aa935c..4fa718eb34f 100644
--- a/sample/05-sql-typeorm/package-lock.json
+++ b/sample/05-sql-typeorm/package-lock.json
@@ -11027,9 +11027,9 @@
       }
     },
     "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 a80c9be1fae..0ced65f62e2 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": "6.10.0",
     "eslint-plugin-import": "2.20.1",
-    "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 f3db6fabfd0..a2dd2b9e243 100644
--- a/sample/06-mongoose/package-lock.json
+++ b/sample/06-mongoose/package-lock.json
@@ -10799,9 +10799,9 @@
       }
     },
     "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 49d62a455bd..8d1df3a8708 100644
--- a/sample/06-mongoose/package.json
+++ b/sample/06-mongoose/package.json
@@ -49,6 +49,6 @@
     "eslint": "6.8.0",
     "eslint-config-prettier": "6.10.0",
     "eslint-plugin-import": "2.20.1",
-    "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 a0e8fdb5d0e..9a8d281a2b3 100644
--- a/sample/07-sequelize/package-lock.json
+++ b/sample/07-sequelize/package-lock.json
@@ -10969,9 +10969,9 @@
       }
     },
     "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 2dc6f7905cf..1d35bc4c2c9 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": "6.10.0",
     "eslint-plugin-import": "2.20.1",
-    "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 24a64d6fa85..39715b6aed0 100644
--- a/sample/08-webpack/package-lock.json
+++ b/sample/08-webpack/package-lock.json
@@ -6176,9 +6176,9 @@
       "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 606ff5d96ea..9eb6402aca1 100644
--- a/sample/08-webpack/package.json
+++ b/sample/08-webpack/package.json
@@ -16,7 +16,7 @@
     "@nestjs/platform-express": "7.0.3",
     "reflect-metadata": "0.1.13",
     "rxjs": "6.5.4",
-    "typescript": "3.7.2"
+    "typescript": "3.8.3"
   },
   "devDependencies": {
     "@types/node": "12.12.21",
diff --git a/sample/10-fastify/package-lock.json b/sample/10-fastify/package-lock.json
index 351ae75d61f..1ad554bcddd 100644
--- a/sample/10-fastify/package-lock.json
+++ b/sample/10-fastify/package-lock.json
@@ -10548,9 +10548,9 @@
       }
     },
     "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 1fcb492354e..df1edd58909 100644
--- a/sample/10-fastify/package.json
+++ b/sample/10-fastify/package.json
@@ -48,6 +48,6 @@
     "eslint": "6.8.0",
     "eslint-config-prettier": "6.10.0",
     "eslint-plugin-import": "2.20.1",
-    "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 3c8d679c6b3..eb9a1240eea 100644
--- a/sample/11-swagger/package-lock.json
+++ b/sample/11-swagger/package-lock.json
@@ -10609,9 +10609,9 @@
       }
     },
     "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 3970cf6288b..8629b0ae6e8 100644
--- a/sample/11-swagger/package.json
+++ b/sample/11-swagger/package.json
@@ -49,6 +49,6 @@
     "eslint": "6.8.0",
     "eslint-config-prettier": "6.10.0",
     "eslint-plugin-import": "2.20.1",
-    "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 4f2dfb5c464..f0a6ddedb31 100644
--- a/sample/12-graphql-schema-first/package-lock.json
+++ b/sample/12-graphql-schema-first/package-lock.json
@@ -12240,9 +12240,9 @@
       }
     },
     "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 f0707208c7b..dea0476f48c 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": "6.10.0",
     "eslint-plugin-import": "2.20.1",
-    "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 aff2f55da48..69f10fb2a39 100644
--- a/sample/13-mongo-typeorm/package-lock.json
+++ b/sample/13-mongo-typeorm/package-lock.json
@@ -10993,9 +10993,9 @@
       }
     },
     "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 eb73492bd9b..fbba058860a 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": "6.10.0",
     "eslint-plugin-import": "2.20.1",
-    "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 3264d187120..89d27571ca8 100644
--- a/sample/14-mongoose-base/package-lock.json
+++ b/sample/14-mongoose-base/package-lock.json
@@ -10713,9 +10713,9 @@
       }
     },
     "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 294a8e00f8e..77aa6aaf791 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": "6.10.0",
     "eslint-plugin-import": "2.20.1",
-    "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 e3772af5f2a..952c4755b2f 100644
--- a/sample/15-mvc/package-lock.json
+++ b/sample/15-mvc/package-lock.json
@@ -10925,9 +10925,9 @@
       }
     },
     "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 e66ccec7947..d7b230c81f6 100644
--- a/sample/15-mvc/package.json
+++ b/sample/15-mvc/package.json
@@ -47,6 +47,6 @@
     "eslint": "6.8.0",
     "eslint-config-prettier": "6.10.0",
     "eslint-plugin-import": "2.20.1",
-    "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 4b5c18b8e3e..fd75133d374 100644
--- a/sample/16-gateways-ws/package-lock.json
+++ b/sample/16-gateways-ws/package-lock.json
@@ -10635,9 +10635,9 @@
       }
     },
     "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 7f90ea20007..131a5ef5cf6 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": "6.10.0",
     "eslint-plugin-import": "2.20.1",
-    "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 9dafea52a74..a7289a41607 100644
--- a/sample/17-mvc-fastify/package-lock.json
+++ b/sample/17-mvc-fastify/package-lock.json
@@ -10301,9 +10301,9 @@
       }
     },
     "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 dd02b75ac76..cbbf18d77aa 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": "6.10.0",
     "eslint-plugin-import": "2.20.1",
-    "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 c75f9c766be..d90406dac21 100644
--- a/sample/18-context/package-lock.json
+++ b/sample/18-context/package-lock.json
@@ -9815,9 +9815,9 @@
       }
     },
     "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 aaebd042859..efde15ed64c 100644
--- a/sample/18-context/package.json
+++ b/sample/18-context/package.json
@@ -42,6 +42,6 @@
     "eslint": "6.8.0",
     "eslint-config-prettier": "6.10.0",
     "eslint-plugin-import": "2.20.1",
-    "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 1c1bd14229a..a7feac0c51f 100644
--- a/sample/19-auth-jwt/package-lock.json
+++ b/sample/19-auth-jwt/package-lock.json
@@ -12287,9 +12287,9 @@
       }
     },
     "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 06ad938a9fb..fec0d4d86a3 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": "6.10.0",
     "eslint-plugin-import": "2.20.1",
-    "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 36af9e9edc0..d18d6f87199 100644
--- a/sample/20-cache/package-lock.json
+++ b/sample/20-cache/package-lock.json
@@ -10627,9 +10627,9 @@
       }
     },
     "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 05ac1e484e5..73ebcee7648 100644
--- a/sample/20-cache/package.json
+++ b/sample/20-cache/package.json
@@ -47,6 +47,6 @@
     "eslint": "6.8.0",
     "eslint-config-prettier": "6.10.0",
     "eslint-plugin-import": "2.20.1",
-    "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 1b4616f1bf7..92ffc18d0a7 100644
--- a/sample/21-serializer/package-lock.json
+++ b/sample/21-serializer/package-lock.json
@@ -10546,9 +10546,9 @@
       }
     },
     "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 c70f32f63d6..fda262635ce 100644
--- a/sample/21-serializer/package.json
+++ b/sample/21-serializer/package.json
@@ -46,6 +46,6 @@
     "eslint": "6.8.0",
     "eslint-config-prettier": "6.10.0",
     "eslint-plugin-import": "2.20.1",
-    "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 362126d4d59..b76d9c17654 100644
--- a/sample/22-graphql-prisma/package-lock.json
+++ b/sample/22-graphql-prisma/package-lock.json
@@ -13154,9 +13154,9 @@
       }
     },
     "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 c1590b6f388..f357ed7093a 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": "6.10.0",
     "eslint-plugin-import": "2.20.1",
-    "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 fa53f97c1db..a437c4bc99a 100644
--- a/sample/23-graphql-code-first/package-lock.json
+++ b/sample/23-graphql-code-first/package-lock.json
@@ -12470,9 +12470,9 @@
       }
     },
     "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 b9513a589ac..09751e6279d 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": "6.10.0",
     "eslint-plugin-import": "2.20.1",
-    "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 c2003667ddf..91986e7af61 100644
--- a/sample/24-serve-static/package-lock.json
+++ b/sample/24-serve-static/package-lock.json
@@ -10561,9 +10561,9 @@
       }
     },
     "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 2ce310ade29..dd30ffea31e 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": "6.10.0",
     "eslint-plugin-import": "2.20.1",
-    "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 a703eac5853..69966f6045f 100644
--- a/sample/25-dynamic-modules/package-lock.json
+++ b/sample/25-dynamic-modules/package-lock.json
@@ -11949,9 +11949,9 @@
       }
     },
     "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 ea73b31bee0..800e8c424bd 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": "6.10.0",
     "eslint-plugin-import": "2.20.1",
-    "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 cbc04b5d5a6..eb65d3ca5a3 100644
--- a/sample/26-queues/package-lock.json
+++ b/sample/26-queues/package-lock.json
@@ -12448,9 +12448,9 @@
       }
     },
     "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 81820044f7c..8bbf9dcafc2 100644
--- a/sample/26-queues/package.json
+++ b/sample/26-queues/package.json
@@ -51,7 +51,7 @@
     "eslint": "6.8.0",
     "eslint-config-prettier": "6.10.0",
     "eslint-plugin-import": "2.20.1",
-    "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 e5fff3d8fa8..d2e0c23b775 100644
--- a/sample/27-scheduling/package-lock.json
+++ b/sample/27-scheduling/package-lock.json
@@ -12004,9 +12004,9 @@
       }
     },
     "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 aa49743b8e5..cd3175126b5 100644
--- a/sample/27-scheduling/package.json
+++ b/sample/27-scheduling/package.json
@@ -50,7 +50,7 @@
     "eslint": "6.8.0",
     "eslint-config-prettier": "6.10.0",
     "eslint-plugin-import": "2.20.1",
-    "typescript": "3.7.2"
+    "typescript": "3.8.3"
   },
   "jest": {
     "moduleFileExtensions": [