diff --git a/build-constraints.yaml b/build-constraints.yaml
index 26e49582..0f88b50c 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -1889,9 +1889,6 @@ packages:
         - hse-cpp
 
     "Stackage upper bounds":
-        # https://github.com/joelwilliamson/bimap/pull/4
-        - bimap < 0.3.1
-
         # https://github.com/fpco/stackage/issues/946
         - cereal < 0.5
         - messagepack < 0.5.0