diff --git a/build-constraints.yaml b/build-constraints.yaml
index 235d17b4..7e7fb478 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -2403,9 +2403,6 @@ packages:
         # https://github.com/fpco/stackage/issues/1597
         - tagsoup < 0.14
 
-        # https:/github.com/fpco/stackage/issues/1645
-        - semigroups < 0.18.2
-
 # end of packages