diff --git a/.circleci/config.yml b/.circleci/config.yml
index 597bb333..c23341d1 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -197,7 +197,7 @@ workflows:
               matrix:
                  parameters:
                     os: [ linux ]
-                    python_version: [ "3.8", "3.9", "3.10", "3.11", "3.12" ]
+                    python_version: [ "3.10" ]
               name: build-<< matrix.os >>-<< matrix.python_version >>
 
          - upload:
diff --git a/.github/workflows/nightly-build.yml b/.github/workflows/nightly-build.yml
index 44f04844..1f1af0d4 100644
--- a/.github/workflows/nightly-build.yml
+++ b/.github/workflows/nightly-build.yml
@@ -28,7 +28,7 @@ jobs:
             C_COMPILER: clang_osx-64 
             FORTRAN_COMPILER: gfortran_osx-64
             PROJECT_DIR: workdir/macos_64
-        python_version: ['3.8', '3.9', '3.10', '3.11', '3.12']
+        python_version: ['3.10']
     runs-on: ${{ matrix.runner.RUNNER_OS }}
     env:
       PACKAGE_NAME: cmor