diff --git a/build-constraints.yaml b/build-constraints.yaml
index 08a28098..3c61fe2c 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -2821,7 +2821,7 @@ packages:
     "Ashley Yakeley <ashley@semantic.org> @AshleyYakeley":
         - countable
         - witness
-        # - open-witness # https://github.com/AshleyYakeley/open-witness/issues/1
+        - open-witness
 
     "Victor Denisov <denisovenator@gmail.com> @VictorDenisov":
         - mongoDB