diff --git a/web/src/app/webview/src/debug-main.ts b/web/src/app/webview/src/debug-main.ts
index 7e4d026204..02a47101a6 100644
--- a/web/src/app/webview/src/debug-main.ts
+++ b/web/src/app/webview/src/debug-main.ts
@@ -10,6 +10,6 @@ import { SourcemappedWorker } from '@keymanapp/lexical-model-layer/web'
  */
 const scripts = document.getElementsByTagName('script');
 const ss = scripts[scripts.length-1].src;
-const sPath = ss.slice(0,ss.lastIndexOf('/'));
+const sPath = ss.substring(0,ss.lastIndexOf('/')+1);
 
 window['keyman'] = new KeymanEngine(SourcemappedWorker.constructInstance(), sPath);
\ No newline at end of file
diff --git a/web/src/app/webview/src/release-main.ts b/web/src/app/webview/src/release-main.ts
index 3758b887d8..033adc846f 100644
--- a/web/src/app/webview/src/release-main.ts
+++ b/web/src/app/webview/src/release-main.ts
@@ -10,6 +10,6 @@ import { Worker } from '@keymanapp/lexical-model-layer/web'
  */
 const scripts = document.getElementsByTagName('script');
 const ss = scripts[scripts.length-1].src;
-const sPath = ss.slice(0,ss.lastIndexOf('/'));
+const sPath = ss.substring(0,ss.lastIndexOf('/')+1);
 
 window['keyman'] = new KeymanEngine(Worker.constructInstance(), sPath);
\ No newline at end of file