diff --git a/cypress/platform/bundle-test.js b/cypress/platform/bundle-test.js
index b4ce798b2..373f8741a 100644
--- a/cypress/platform/bundle-test.js
+++ b/cypress/platform/bundle-test.js
@@ -1,4 +1,4 @@
-import mermaid from '../../dist/mermaid.core.mjs';
+import mermaid from '../../dist/mermaid.core';
 
 let code = `flowchart LR
 Power_Supply --> Transmitter_A