diff --git a/packages/cache/src/internal/contracts.d.ts b/packages/cache/src/internal/contracts.ts
similarity index 94%
rename from packages/cache/src/internal/contracts.d.ts
rename to packages/cache/src/internal/contracts.ts
index 6fcd9427..db3dfdd9 100644
--- a/packages/cache/src/internal/contracts.d.ts
+++ b/packages/cache/src/internal/contracts.ts
@@ -1,4 +1,4 @@
-import {CompressionMethod} from './constants'
+import {CompressionMethod} from './constants.js'
 import {TypedResponse} from '@actions/http-client/lib/interfaces'
 import {HttpClientError} from '@actions/http-client'