diff --git a/package.json b/package.json
index 9c8af77..0c5126d 100644
--- a/package.json
+++ b/package.json
@@ -59,7 +59,7 @@
     "prettier": "3.2.5",
     "publint": "0.2.7",
     "svelte-check": "3.6.6",
-    "typescript": "5.1.6",
+    "typescript": "5.4.2",
     "vitest": "0.34.6"
   },
   "engines": {
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 13538b9..ea4ac7d 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -41,8 +41,8 @@ devDependencies:
     specifier: 3.6.6
     version: 3.6.6(svelte@4.2.12)
   typescript:
-    specifier: 5.1.6
-    version: 5.1.6
+    specifier: 5.4.2
+    version: 5.4.2
   vitest:
     specifier: 0.34.6
     version: 0.34.6
@@ -2581,8 +2581,8 @@ packages:
       picocolors: 1.0.0
       sade: 1.8.1
       svelte: 4.2.12
-      svelte-preprocess: 5.1.3(svelte@4.2.12)(typescript@5.1.6)
-      typescript: 5.1.6
+      svelte-preprocess: 5.1.3(svelte@4.2.12)(typescript@5.4.2)
+      typescript: 5.4.2
     transitivePeerDependencies:
       - '@babel/core'
       - coffeescript
@@ -2603,7 +2603,7 @@ packages:
       svelte: 4.2.12
     dev: false
 
-  /svelte-preprocess@5.1.3(svelte@4.2.12)(typescript@5.1.6):
+  /svelte-preprocess@5.1.3(svelte@4.2.12)(typescript@5.4.2):
     resolution: {integrity: sha512-xxAkmxGHT+J/GourS5mVJeOXZzne1FR5ljeOUAMXUkfEhkLEllRreXpbl3dIYJlcJRfL1LO1uIAPpBpBfiqGPw==}
     engines: {node: '>= 16.0.0', pnpm: ^8.0.0}
     requiresBuild: true
@@ -2647,7 +2647,7 @@ packages:
       sorcery: 0.11.0
       strip-indent: 3.0.0
       svelte: 4.2.12
-      typescript: 5.1.6
+      typescript: 5.4.2
     dev: true
 
   /svelte@4.2.12:
@@ -2762,8 +2762,8 @@ packages:
       is-typed-array: 1.1.10
     dev: true
 
-  /typescript@5.1.6:
-    resolution: {integrity: sha512-zaWCozRZ6DLEWAWFrVDz1H6FVXzUSfTy5FUMWsQlU8Ym5JP9eO4xkTIROFCQvhQf61z6O/G6ugw3SgAnvvm+HA==}
+  /typescript@5.4.2:
+    resolution: {integrity: sha512-+2/g0Fds1ERlP6JsakQQDXjZdZMM+rqpamFZJEKh4kwTIn3iDkgKtby0CeNd5ATNZ4Ry1ax15TMx0W2V+miizQ==}
     engines: {node: '>=14.17'}
     hasBin: true
     dev: true