diff --git a/build-constraints.yaml b/build-constraints.yaml
index 13e5275c..390eacbc 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -183,6 +183,7 @@ packages:
         - hakyll
         - stylish-haskell
         - psqueues
+        - websockets
 
     "Antoine Latter":
         - byteorder