diff --git a/packages/caches/src/strong.ts b/packages/caches/src/strong.ts
index a064385f..ec94b806 100644
--- a/packages/caches/src/strong.ts
+++ b/packages/caches/src/strong.ts
@@ -1,4 +1,4 @@
-import type { CommonCache } from "./common";
+import type { CommonCache } from "./common.js";
 
 interface Node<K, V> {
   key: K;
diff --git a/packages/caches/src/weak.ts b/packages/caches/src/weak.ts
index d5380c6d..416f3e59 100644
--- a/packages/caches/src/weak.ts
+++ b/packages/caches/src/weak.ts
@@ -1,4 +1,4 @@
-import type { CommonCache } from "./common";
+import type { CommonCache } from "./common.js";
 
 interface PartialNode<K extends object, V> {
   value: V;