diff --git a/src/runtime/motion/spring.js b/src/runtime/motion/spring.js
index f708241956..211645d241 100644
--- a/src/runtime/motion/spring.js
+++ b/src/runtime/motion/spring.js
@@ -1,5 +1,5 @@
-import { writable } from '../store.js';
-import { loop, now } from '../internal.js';
+import { writable } from '../store';
+import { loop, now } from '../internal';
 import { is_date } from './utils.js';
 
 /**
diff --git a/src/runtime/motion/tweened.js b/src/runtime/motion/tweened.js
index 4175203fdf..d14e0ffa64 100644
--- a/src/runtime/motion/tweened.js
+++ b/src/runtime/motion/tweened.js
@@ -1,6 +1,6 @@
-import { writable } from '../store.js';
-import { assign, loop, now } from '../internal.js';
-import { linear } from '../easing.js';
+import { writable } from '../store';
+import { assign, loop, now } from '../internal';
+import { linear } from '../easing';
 import { is_date } from './utils.js';
 
 /** @returns {(t: any) => any} */
diff --git a/src/runtime/store/index.js b/src/runtime/store/index.js
index d3e51d99f0..e3013e2f8b 100644
--- a/src/runtime/store/index.js
+++ b/src/runtime/store/index.js
@@ -5,7 +5,7 @@ import {
 	safe_not_equal,
 	is_function,
 	get_store_value
-} from '../internal.js';
+} from '../internal';
 
 const subscriber_queue = [];
 
diff --git a/src/runtime/transition/index.js b/src/runtime/transition/index.js
index dd67ed07dc..04dfc4d848 100644
--- a/src/runtime/transition/index.js
+++ b/src/runtime/transition/index.js
@@ -1,5 +1,5 @@
-import { cubicOut, cubicInOut, linear } from '../easing.js';
-import { assign, split_css_unit, is_function } from '../internal.js';
+import { cubicOut, cubicInOut, linear } from '../easing';
+import { assign, split_css_unit, is_function } from '../internal';
 
 /**
  * @param {Element} node