diff --git a/build-constraints.yaml b/build-constraints.yaml
index 0749d0a8..21a0e363 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -2000,6 +2000,8 @@ packages:
         # https://github.com/fpco/stackage/issues/1240
         - cryptohash < 0.11.7
 
+        # https://github.com/fpco/stackage/issues/1242
+        - http2 < 1.5.0
 # end of packages