diff --git a/setup.cfg b/setup.cfg
index 30efcfa6..0edca134 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -39,7 +39,7 @@ install_requires =
   astropy>=5.3
   dask[array]>=2021.8.0
   globus-sdk>=3.0
-  gwcs>=0.19.0
+  gwcs<0.21.0
   matplotlib>=3.5
   ndcube[plotting,reproject]>=2.0
   numpy>=1.22