diff --git a/.github/workflows/merge_stage_test.yml b/.github/workflows/merge_stage_test.yml
index 2493528076..7728392481 100644
--- a/.github/workflows/merge_stage_test.yml
+++ b/.github/workflows/merge_stage_test.yml
@@ -244,7 +244,7 @@ jobs:
           python -V
           pip install -U openmim
           pip install git+https://github.com/open-mmlab/mmengine.git
-          mim install 'mmcv>=2.0.0rc3'
+          mim install 'mmcv==2.0.0rc3'
           pip install git+https://github.com/open-mmlab/mmclassification.git@dev-1.x
           mim install 'mmdet==3.0.0rc5'
       - name: Install unittest dependencies