diff --git a/spa/package-lock.json b/spa/package-lock.json
index ae5fb8d0..0b5d894a 100644
--- a/spa/package-lock.json
+++ b/spa/package-lock.json
@@ -37,7 +37,7 @@
         "npm-run-all": "^4.1.5",
         "prettier": "^2.8.8",
         "start-server-and-test": "^2.0.11",
-        "typescript": "~5.4.5",
+        "typescript": "~5.9.3",
         "vite": "^6.4.1",
         "vitest": "^3.0.7",
         "vitest-localstorage-mock": "^0.1.2",
@@ -7663,9 +7663,9 @@
       }
     },
     "node_modules/typescript": {
-      "version": "5.4.5",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.4.5.tgz",
-      "integrity": "sha512-vcI4UpRgg81oIRUFwR0WSIHKt11nJ7SAVlYNIu+QpqeyXP+gpQJy/Z4+F0aGxSE4MqwjyXvW/TzgkLAx2AGHwQ==",
+      "version": "5.9.3",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.9.3.tgz",
+      "integrity": "sha512-jl1vZzPDinLr9eUt3J/t7V6FgNEw9QjvBPdysz9KfQDD41fQrC2Y4vKQdiaUpFT4bXlb1RHhLpp8wtm6M5TgSw==",
       "devOptional": true,
       "bin": {
         "tsc": "bin/tsc",
@@ -13240,9 +13240,9 @@
       "dev": true
     },
     "typescript": {
-      "version": "5.4.5",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.4.5.tgz",
-      "integrity": "sha512-vcI4UpRgg81oIRUFwR0WSIHKt11nJ7SAVlYNIu+QpqeyXP+gpQJy/Z4+F0aGxSE4MqwjyXvW/TzgkLAx2AGHwQ==",
+      "version": "5.9.3",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.9.3.tgz",
+      "integrity": "sha512-jl1vZzPDinLr9eUt3J/t7V6FgNEw9QjvBPdysz9KfQDD41fQrC2Y4vKQdiaUpFT4bXlb1RHhLpp8wtm6M5TgSw==",
       "devOptional": true
     },
     "unbox-primitive": {
diff --git a/spa/package.json b/spa/package.json
index 733ac70d..366a3f54 100644
--- a/spa/package.json
+++ b/spa/package.json
@@ -46,7 +46,7 @@
     "npm-run-all": "^4.1.5",
     "prettier": "^2.8.8",
     "start-server-and-test": "^2.0.11",
-    "typescript": "~5.4.5",
+    "typescript": "~5.9.3",
     "vite": "^6.4.1",
     "vitest": "^3.0.7",
     "vitest-localstorage-mock": "^0.1.2",