diff --git a/src/lib/components/controls/createAutoScrollHandler.ts b/src/lib/components/controls/createAutoScrollHandler.ts
index 1d44bfac..e34b1800 100644
--- a/src/lib/components/controls/createAutoScrollHandler.ts
+++ b/src/lib/components/controls/createAutoScrollHandler.ts
@@ -1,4 +1,4 @@
-import { createDebug } from '../../utils/debug'
+import { createDebug } from '../../utils/debug.js'
 import {
   AUTO_SCROLL_INTERVAL,
   AUTO_SCROLL_SPEED_FAST,
diff --git a/src/lib/components/controls/createFocusTracker.ts b/src/lib/components/controls/createFocusTracker.ts
index 1baf58d7..b6ab0abb 100644
--- a/src/lib/components/controls/createFocusTracker.ts
+++ b/src/lib/components/controls/createFocusTracker.ts
@@ -1,4 +1,4 @@
-import { createDebug } from '../../utils/debug'
+import { createDebug } from '../../utils/debug.js'
 
 const debug = createDebug('jsoneditor:FocusTracker')
 
diff --git a/src/lib/logic/history.ts b/src/lib/logic/history.ts
index 584083b7..29d9506a 100644
--- a/src/lib/logic/history.ts
+++ b/src/lib/logic/history.ts
@@ -1,4 +1,4 @@
-import { createDebug } from '../utils/debug'
+import { createDebug } from '../utils/debug.js'
 
 const MAX_HISTORY_ITEMS = 1000
 
diff --git a/src/lib/plugins/value/components/utils/getValueClass.ts b/src/lib/plugins/value/components/utils/getValueClass.ts
index 3cafc7d6..ca4209d3 100644
--- a/src/lib/plugins/value/components/utils/getValueClass.ts
+++ b/src/lib/plugins/value/components/utils/getValueClass.ts
@@ -1,4 +1,4 @@
-import { isUrl, valueType } from '../../../../utils/typeUtils'
+import { isUrl, valueType } from '../../../../utils/typeUtils.js'
 import classnames from 'classnames'
 import type { JSONParser } from '$lib'