diff --git a/packages/radfish/storage/Collection.js b/packages/radfish/storage/Collection.js
index 66bdd1ad..fb39f3df 100644
--- a/packages/radfish/storage/Collection.js
+++ b/packages/radfish/storage/Collection.js
@@ -1,4 +1,4 @@
-import Schema from "./Schema";
+import Schema from "./Schema.js";
 
 class Collection extends EventTarget {
   constructor(schema, connector) {
diff --git a/packages/radfish/storage/Connector.js b/packages/radfish/storage/Connector.js
index f742c894..375cceea 100644
--- a/packages/radfish/storage/Connector.js
+++ b/packages/radfish/storage/Connector.js
@@ -1,5 +1,5 @@
-import Collection from "./Collection";
-import Schema from "./Schema";
+import Collection from "./Collection.js";
+import Schema from "./Schema.js";
 class Connector extends EventTarget {
   constructor(engine) {
     super();
diff --git a/packages/radfish/storage/IndexedDBConnector.js b/packages/radfish/storage/IndexedDBConnector.js
index a0261f00..a74c3855 100644
--- a/packages/radfish/storage/IndexedDBConnector.js
+++ b/packages/radfish/storage/IndexedDBConnector.js
@@ -1,6 +1,6 @@
 import Dexie from "dexie";
-import Connector from "./Connector";
-import Engine from "./Engine";
+import Connector from "./Connector.js";
+import Engine from "./Engine.js";
 
 /**
  * IndexedDBEngine - A storage engine that uses IndexedDB (via Dexie) for persistence
diff --git a/packages/radfish/storage/LocalStorageConnector.js b/packages/radfish/storage/LocalStorageConnector.js
index 409b5e59..91e03f51 100644
--- a/packages/radfish/storage/LocalStorageConnector.js
+++ b/packages/radfish/storage/LocalStorageConnector.js
@@ -1,5 +1,5 @@
-import Connector from "./Connector";
-import Engine from "./Engine";
+import Connector from "./Connector.js";
+import Engine from "./Engine.js";
 
 /**
  * LocalStorageEngine - A storage engine that uses localStorage for persistence
diff --git a/packages/radfish/storage/Store.js b/packages/radfish/storage/Store.js
index d72bb003..912fac16 100644
--- a/packages/radfish/storage/Store.js
+++ b/packages/radfish/storage/Store.js
@@ -1,4 +1,4 @@
-import Connector from "./Connector";
+import Connector from "./Connector.js";
 
 class Store {
   constructor ({ name, connector }) {
diff --git a/packages/radfish/storage/index.js b/packages/radfish/storage/index.js
index 1ee0ff90..30791c0f 100644
--- a/packages/radfish/storage/index.js
+++ b/packages/radfish/storage/index.js
@@ -1,5 +1,5 @@
-export { default as Schema } from "./Schema";
-export { default as Connector } from "./Connector";
-export { default as Store } from "./Store";
-export { default as LocalStorageConnector } from "./LocalStorageConnector";
-export { default as IndexedDBConnector } from "./IndexedDBConnector";
\ No newline at end of file
+export { default as Schema } from "./Schema.js";
+export { default as Connector } from "./Connector.js";
+export { default as Store } from "./Store.js";
+export { default as LocalStorageConnector } from "./LocalStorageConnector.js";
+export { default as IndexedDBConnector } from "./IndexedDBConnector.js";
\ No newline at end of file