diff --git a/types/node-xlsx/tsconfig.json b/types/node-xlsx/tsconfig.json
index 168c454276..915d266284 100644
--- a/types/node-xlsx/tsconfig.json
+++ b/types/node-xlsx/tsconfig.json
@@ -14,7 +14,7 @@
         "types": [],
         "noEmit": true,
         "forceConsistentCasingInFileNames": true,
-        "strictFunctionTypes": false
+        "strictFunctionTypes": true
     },
     "files": [
         "index.d.ts",