diff --git a/requirements-github.txt b/requirements-github.txt
index 7fd53a4..789d706 100644
--- a/requirements-github.txt
+++ b/requirements-github.txt
@@ -2,7 +2,7 @@ pyyaml>=6.0
 pycodestyle>=2.9.1
 netCDF4>=1.6.1
 matplotlib>=3.9.0
-cartopy>=0.23.0
+cartopy>=0.21.1
 scikit-learn>=1.1.2
 xarray>=2022.6.0
 seaborn>=0.12.2