diff --git a/packages/backend-core/src/security/encryption.ts b/packages/backend-core/src/security/encryption.ts
index 29a8274c54..e4d4048590 100644
--- a/packages/backend-core/src/security/encryption.ts
+++ b/packages/backend-core/src/security/encryption.ts
@@ -116,6 +116,8 @@ export async function decryptFile(
 
   return new Promise<void>(r => {
     outputFile.on("finish", () => {
+      inputFile.close()
+      outputFile.close()
       r()
     })
   })