diff --git a/.github/workflows/ci-tests.yml b/.github/workflows/ci-tests.yml
index 1b4282fa79..769de3f1a6 100644
--- a/.github/workflows/ci-tests.yml
+++ b/.github/workflows/ci-tests.yml
@@ -99,7 +99,7 @@ jobs:
           cache_build: 2
           cache_period: ${{ env.CACHE_PERIOD }}
           env_name: ${{ env.ENV_NAME }}
-          install_packages: "cartopy nox pip"
+          install_packages: "cartopy=0.23.0 nox pip"
 
       - name: "conda info"
         run: |