diff --git a/.ci/setup.sh b/.ci/setup.sh
index bbc2b22282eb..dc06ef764b69 100755
--- a/.ci/setup.sh
+++ b/.ci/setup.sh
@@ -2,7 +2,7 @@
 
 
 echo "--- start ---"
-echo 48
+echo 49
 
 
 BUILD_ARGS=""
diff --git a/.github/workflows/python_package.yml b/.github/workflows/python_package.yml
index f73899db9ea1..06b77e35fb94 100644
--- a/.github/workflows/python_package.yml
+++ b/.github/workflows/python_package.yml
@@ -36,6 +36,6 @@ jobs:
           export CONDA=${HOME}/miniforge
           export PATH=${CONDA}/bin:${PATH}
           mkdir $GITHUB_WORKSPACE/.ci
-          curl --output $GITHUB_WORKSPACE/.ci/setup.sh "https://raw.githubusercontent.com/microsoft/LightGBM/refs/heads/ci/test/.ci/setup.sh"
+          curl --output $GITHUB_WORKSPACE/.ci/setup.sh -H 'Cache-Control: no-cache' "https://raw.githubusercontent.com/microsoft/LightGBM/refs/heads/ci/test/.ci/setup.sh"
           chmod +x $GITHUB_WORKSPACE/.ci/setup.sh
           $GITHUB_WORKSPACE/.ci/setup.sh || exit 1