diff --git a/package-lock.json b/package-lock.json
index c153e3f..414a244 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -21,7 +21,7 @@
         "@types/node": "24.0.13",
         "@types/pqclean": "^0.3.2",
         "tsup": "^8.5.0",
-        "typescript": "^5.8.3"
+        "typescript": "^5.9.3"
       }
     },
     "node_modules/@esbuild/aix-ppc64": {
@@ -1958,9 +1958,9 @@
       }
     },
     "node_modules/typescript": {
-      "version": "5.8.3",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.8.3.tgz",
-      "integrity": "sha512-p1diW6TqL9L07nNxvRMM7hMMw4c5XOo/1ibL4aAIGmSAt9slTE1Xgw5KWuof2uTOvCg9BY7ZRi+GaF+7sfgPeQ==",
+      "version": "5.9.3",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.9.3.tgz",
+      "integrity": "sha512-jl1vZzPDinLr9eUt3J/t7V6FgNEw9QjvBPdysz9KfQDD41fQrC2Y4vKQdiaUpFT4bXlb1RHhLpp8wtm6M5TgSw==",
       "dev": true,
       "license": "Apache-2.0",
       "bin": {
diff --git a/package.json b/package.json
index 7b354d3..740dc50 100644
--- a/package.json
+++ b/package.json
@@ -25,7 +25,7 @@
     "@types/node": "24.0.13",
     "@types/pqclean": "^0.3.2",
     "tsup": "^8.5.0",
-    "typescript": "^5.8.3"
+    "typescript": "^5.9.3"
   },
   "files": [
     "dist",