diff --git a/build-constraints.yaml b/build-constraints.yaml
index 9b21dcb89..0360ad1aa 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -5399,7 +5399,7 @@ packages:
         - richenv
 
     "Zac Slade <krakrjak@gmail.com> @krakrjak":
-        - fits-parse
+        - fits-parse < 0.4.1  # https://github.com/commercialhaskell/stackage/issues/7494
 
     "Chris Hackett <chris.h.hackett@gmail.com> @chhackett":
         - vty-windows