diff --git a/build-constraints.yaml b/build-constraints.yaml
index 9e75ac0b..3932a4d8 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -115,7 +115,7 @@ packages:
         - yesod-sitemap
         - yesod-static
         - yesod-test
-        #- yesod-websockets # https://github.com/yesodweb/yesod/issues/1311
+        - yesod-websockets
         - cereal-conduit
         - binary-conduit
         # GHC 8 - lzma-conduit