diff --git a/projects/mat-image-overlay/ng-package.json b/projects/mat-image-overlay/ng-package.json
index 1a36051..b6e989d 100644
--- a/projects/mat-image-overlay/ng-package.json
+++ b/projects/mat-image-overlay/ng-package.json
@@ -6,6 +6,6 @@
     "examples"
   ],
   "lib": {
-    "entryFile": "src/public_api.ts"
+    "entryFile": "src/public-api.ts"
   }
 }
diff --git a/projects/mat-image-overlay/src/public_api.ts b/projects/mat-image-overlay/src/public-api.ts
similarity index 100%
rename from projects/mat-image-overlay/src/public_api.ts
rename to projects/mat-image-overlay/src/public-api.ts
diff --git a/projects/mat-image-overlay/testing/ng-package.json b/projects/mat-image-overlay/testing/ng-package.json
index ffcd441..d0a2dcd 100644
--- a/projects/mat-image-overlay/testing/ng-package.json
+++ b/projects/mat-image-overlay/testing/ng-package.json
@@ -1 +1,6 @@
-{ }
+{
+  "$schema": "../../../node_modules/ng-packagr/ng-package.schema.json",
+  "lib": {
+    "entryFile": "src/public-api.ts"
+  }
+}
diff --git a/projects/mat-image-overlay/testing/src/public_api.ts b/projects/mat-image-overlay/testing/src/public-api.ts
similarity index 100%
rename from projects/mat-image-overlay/testing/src/public_api.ts
rename to projects/mat-image-overlay/testing/src/public-api.ts