diff --git a/apps/nextjs/tsconfig.json b/apps/nextjs/tsconfig.json
index 3b6db9dd..d1ac62cc 100644
--- a/apps/nextjs/tsconfig.json
+++ b/apps/nextjs/tsconfig.json
@@ -8,7 +8,7 @@
       "esnext"
     ],
     "allowJs": true,
-    "strict": false,
+    "strict": true,
     "forceConsistentCasingInFileNames": true,
     "noEmit": true,
     "esModuleInterop": true,
diff --git a/tsconfig.build.json b/tsconfig.build.json
index a3b35787..68723947 100644
--- a/tsconfig.build.json
+++ b/tsconfig.build.json
@@ -3,6 +3,7 @@
     "module": "commonjs",
     "target": "es5",
     "sourceMap": true,
+    "strict": true,
     "declaration": true,
     "declarationMap": true,
     "noEmitOnError": true,