diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 4fe1ad853..7b077be04 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -351,7 +351,7 @@ jobs:
         python setup.py sdist bdist_wheel
 
     - name: Publish to PyPI (Test)
-      uses: pypa/gh-action-pypi-publish@master
+      uses: pypa/gh-action-pypi-publish@v1.5.0
       if: (github.event_name == 'release')
       with:
         user: __token__
@@ -359,7 +359,7 @@ jobs:
         repository_url: https://test.pypi.org/legacy/
 
     - name: Publish to PyPI
-      uses: pypa/gh-action-pypi-publish@master
+      uses: pypa/gh-action-pypi-publish@v1.5.0
       if: (github.event_name == 'release')
       with:
         user: __token__