diff --git a/package.json b/package.json
index a00e797..5baa461 100644
--- a/package.json
+++ b/package.json
@@ -59,7 +59,7 @@
     "prettier": "3.3.3",
     "publint": "0.2.9",
     "svelte-check": "3.8.4",
-    "typescript": "5.1.6",
+    "typescript": "5.5.4",
     "vitest": "0.34.6"
   },
   "engines": {
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index d39a632..0b342ce 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -41,8 +41,8 @@ devDependencies:
     specifier: 3.8.4
     version: 3.8.4(svelte@4.2.18)
   typescript:
-    specifier: 5.1.6
-    version: 5.1.6
+    specifier: 5.5.4
+    version: 5.5.4
   vitest:
     specifier: 0.34.6
     version: 0.34.6
@@ -1969,8 +1969,8 @@ packages:
       picocolors: 1.0.1
       sade: 1.8.1
       svelte: 4.2.18
-      svelte-preprocess: 5.1.4(svelte@4.2.18)(typescript@5.1.6)
-      typescript: 5.1.6
+      svelte-preprocess: 5.1.4(svelte@4.2.18)(typescript@5.5.4)
+      typescript: 5.5.4
     transitivePeerDependencies:
       - '@babel/core'
       - coffeescript
@@ -1991,7 +1991,7 @@ packages:
       svelte: 4.2.18
     dev: false
 
-  /svelte-preprocess@5.1.4(svelte@4.2.18)(typescript@5.1.6):
+  /svelte-preprocess@5.1.4(svelte@4.2.18)(typescript@5.5.4):
     resolution: {integrity: sha512-IvnbQ6D6Ao3Gg6ftiM5tdbR6aAETwjhHV+UKGf5bHGYR69RQvF1ho0JKPcbUON4vy4R7zom13jPjgdOWCQ5hDA==}
     engines: {node: '>= 16.0.0'}
     requiresBuild: true
@@ -2035,7 +2035,7 @@ packages:
       sorcery: 0.11.0
       strip-indent: 3.0.0
       svelte: 4.2.18
-      typescript: 5.1.6
+      typescript: 5.5.4
     dev: true
 
   /svelte@4.2.18:
@@ -2108,8 +2108,8 @@ packages:
     engines: {node: '>=4'}
     dev: true
 
-  /typescript@5.1.6:
-    resolution: {integrity: sha512-zaWCozRZ6DLEWAWFrVDz1H6FVXzUSfTy5FUMWsQlU8Ym5JP9eO4xkTIROFCQvhQf61z6O/G6ugw3SgAnvvm+HA==}
+  /typescript@5.5.4:
+    resolution: {integrity: sha512-Mtq29sKDAEYP7aljRgtPOpTvOfbwRWlS6dPRzwjdE+C0R4brX/GUyhHSecbHMFLNBLcJIPt9nl9yG5TZ1weH+Q==}
     engines: {node: '>=14.17'}
     hasBin: true
     dev: true