diff --git a/build-constraints.yaml b/build-constraints.yaml
index 805640b4..ca018627 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -4878,7 +4878,7 @@ packages:
 
     "Stackage upper bounds":
       # https://github.com/commercialhaskell/stackage/issues/5323
-      - base64-bytestring < 1.1
+      - base64-bytestring # 1.1
 
       # https://github.com/commercialhaskell/stackage/issues/5324
       - cabal2nix < 2.15.2