diff --git a/build-constraints.yaml b/build-constraints.yaml
index 752a7eff..a0ba09e7 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -5015,7 +5015,7 @@ packages:
         - process-extras
         - product-isomorphic
         - project-template
-        - protobuf
+        - protobuf < 0.2.1.4 # https://github.com/alphaHeavy/protobuf/issues/39
         - pureMD5
         - quickcheck-instances
         - quickcheck-io