diff --git a/src/index.js b/src/index.js
index 43a666b..d420c6c 100644
--- a/src/index.js
+++ b/src/index.js
@@ -231,6 +231,8 @@ for (const parentRepo of ModuleRepos) {
     }
   }
 
+  moduleJson.modules = moduleJson.modules.filter((x) => x !== null);
+
   writeFileSync(repoJsonPath, JSON.stringify(moduleJson));
 
   oldTotalModulesJson = oldTotalModulesJson.concat(moduleJson.modules);