diff --git a/build-constraints.yaml b/build-constraints.yaml
index 0a5adf50..7a966a2e 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -73,7 +73,7 @@ packages:
         - sparse-tensor
 
     "Stephan Schiffels <stephan_schiffels@mac.com> @stschiff":
-        - sequence-formats
+        - sequence-formats < 1.5 # https://github.com/stschiff/sequence-formats/issues/1
         - pipes-ordered-zip
         - sequenceTools