diff --git a/build-constraints.yaml b/build-constraints.yaml
index ae5ef2cd..444ea219 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -556,7 +556,7 @@ packages:
         - hybrid-vectors
         - indents
         - language-c
-        - persistent-mongoDB < 0 # GHC 8.4 via mongoDB
+        - persistent-mongoDB
         - pretty-class
         - th-expand-syns
         - th-lift