diff --git a/Dockerfile b/Dockerfile
index aaf1c84..4674d0c 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -9,7 +9,7 @@ COPY \
 
 ENV \
     LOG_LEVEL="info" \
-    S3PROXY_AUTHORIZATION="aws-v2" \
+    S3PROXY_AUTHORIZATION="aws-v2-or-v4" \
     S3PROXY_IDENTITY="local-identity" \
     S3PROXY_CREDENTIAL="local-credential" \
     S3PROXY_CORS_ALLOW_ALL="false" \