diff --git a/.gitignore b/.gitignore
index d126ee9897..64e627ee57 100644
--- a/.gitignore
+++ b/.gitignore
@@ -72,5 +72,5 @@ tsconfig.json
 !/.github/workflows/upgrade-compiler-dependencies-1.x.yml
 !/.backportrc.json
 !/.github/workflows/backport.yml
-!/src/_loadurl.js
+!/src/_loadurl.mjs
 !/.projenrc.js
diff --git a/.projen/tasks.json b/.projen/tasks.json
index 6a29b01287..9d35b3402a 100644
--- a/.projen/tasks.json
+++ b/.projen/tasks.json
@@ -115,7 +115,7 @@
           "exec": "jsii --silence-warnings=reserved-word"
         },
         {
-          "exec": "cp src/_loadurl.js lib/"
+          "exec": "cp src/_loadurl.mjs lib/"
         }
       ]
     },
@@ -487,4 +487,4 @@
     "PATH": "$(npx -c \"node --print process.env.PATH\")"
   },
   "//": "~~ Generated by projen. To modify, edit .projenrc.js and run \"npx projen\"."
-}
+}
\ No newline at end of file
diff --git a/.projenrc.js b/.projenrc.js
index 30e63214f7..e05893aa41 100644
--- a/.projenrc.js
+++ b/.projenrc.js
@@ -47,10 +47,10 @@ const project = new Cdk8sTeamJsiiProject({
   jsiiVersion: '^5',
 });
 
-// _loadurl.js is written in javascript so we need to commit it and also copy it
+// _loadurl.mjs is written in javascript so we need to commit it and also copy it
 // after compilation to the `lib/` directory.
-project.gitignore.include('/src/_loadurl.js');
-project.compileTask.exec('cp src/_loadurl.js lib/');
+project.gitignore.include('/src/_loadurl.mjs');
+project.compileTask.exec('cp src/_loadurl.mjs lib/');
 
 const installHelm = project.addTask('install-helm', {
   exec: 'curl https://raw.githubusercontent.com/helm/helm/master/scripts/get-helm-3 | bash',