diff --git a/build-constraints.yaml b/build-constraints.yaml
index a203c1d9..c68a6770 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -3864,6 +3864,9 @@ packages:
         - protocol-buffers < 2.4.12
         - protocol-buffers-descriptor < 2.4.12
 
+        # https://github.com/commercialhaskell/stackage/issues/4179
+        - swagger2 < 2.3.1
+
 # end of packages
 
 # Package flags are applied to individual packages, and override the values of