diff --git a/manifests/contour.ext.yaml b/manifests/contour.ext.yaml
index 100d999..c803636 100644
--- a/manifests/contour.ext.yaml
+++ b/manifests/contour.ext.yaml
@@ -131,9 +131,8 @@ data:
     #   - "grpc_status"
     #   - "grpc_status_number"
     #
-    # default-http-versions:
-    # - "HTTP/2"
-    # - "HTTP/1.1"
+    default-http-versions:
+    - "HTTP/1.1"
     #
     # The following shows the default proxy timeout settings.
     # timeouts: