diff --git a/.github/workflows/builder-unit-test.yml b/.github/workflows/builder-unit-test.yml
index 6977f461..8f2c7844 100644
--- a/.github/workflows/builder-unit-test.yml
+++ b/.github/workflows/builder-unit-test.yml
@@ -13,7 +13,7 @@ jobs:
 
     strategy:
       matrix:
-        python-version: ["3.9", "3.10", "3.11"]
+        python-version: ["3.10", "3.11"]
 
     steps:
       - uses: actions/checkout@v2
diff --git a/.github/workflows/publish_to_anaconda.yml b/.github/workflows/publish_to_anaconda.yml
index d227d92e..c00607a4 100644
--- a/.github/workflows/publish_to_anaconda.yml
+++ b/.github/workflows/publish_to_anaconda.yml
@@ -15,7 +15,7 @@ jobs:
       - uses: conda-incubator/setup-miniconda@v2.0.0
         with:
           auto-update-conda: false
-          python-version: "3.9"
+          python-version: "3.11"
       - name: Build and upload the conda package
         id: build_upload
         env:
diff --git a/.github/workflows/xgboost-build.yml b/.github/workflows/xgboost-build.yml
index f66ecda9..c07f4644 100644
--- a/.github/workflows/xgboost-build.yml
+++ b/.github/workflows/xgboost-build.yml
@@ -13,7 +13,7 @@ jobs:
 
     strategy:
       matrix:
-        python-version: ["3.9", "3.10", "3.11"]
+        python-version: ["3.10", "3.11"]
 
     steps:
       - uses: actions/checkout@v2
diff --git a/open_ce/images/builder-cuda/Dockerfile.cuda-11.8 b/open_ce/images/builder-cuda/Dockerfile.cuda-11.8
index db71034c..73e3be33 100644
--- a/open_ce/images/builder-cuda/Dockerfile.cuda-11.8
+++ b/open_ce/images/builder-cuda/Dockerfile.cuda-11.8
@@ -1,4 +1,4 @@
-FROM docker.io/nvidia/cuda:11.8.0-devel-ubi9
+FROM docker.io/nvidia/cuda:11.8.0-devel-ubi8
 
 ENV CONDA_HOME=${CONDA_HOME:-/opt/conda}
 ENV PATH=$CONDA_HOME/bin:$PATH