diff --git a/build-constraints.yaml b/build-constraints.yaml
index 91af8965..eb6f0896 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -343,7 +343,7 @@ packages:
         - mbug
 
     "David Johnson <djohnson.m@gmail.com> @dmjio":
-        - miso
+        - miso < 0 # Build failure with servant 0.14: https://github.com/dmjio/miso/issues/426
         - envy
         - s3-signer
         # - google-translate # servant 0.12