diff --git a/types/openapi-factory/openapi-factory-tests.ts b/types/openapi-factory/openapi-factory-tests.ts
index ad24a5021d..8213104a44 100644
--- a/types/openapi-factory/openapi-factory-tests.ts
+++ b/types/openapi-factory/openapi-factory-tests.ts
@@ -1,4 +1,4 @@
-import * as OpenApiFactory from 'openapi-factory';
+import OpenApiFactory = require('openapi-factory');
 
 const api = new OpenApiFactory({});
 
diff --git a/types/openapi-factory/tsconfig.json b/types/openapi-factory/tsconfig.json
index e8528e8e84..e9035817a2 100644
--- a/types/openapi-factory/tsconfig.json
+++ b/types/openapi-factory/tsconfig.json
@@ -7,7 +7,7 @@
         "noImplicitAny": true,
         "noImplicitThis": true,
         "strictNullChecks": true,
-        "strictFunctionTypes": false,
+        "strictFunctionTypes": true,
         "baseUrl": "../",
         "typeRoots": [
             "../"