diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 82076c31..b18928cd 100755
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -9,8 +9,10 @@ jobs:
     runs-on: ubuntu-20.04
 
     steps:
-    - uses: actions/checkout@v2
-    - uses: actions/setup-python@v2
+    - uses: actions/checkout@v4
+    - uses: actions/setup-python@v5
+      with:
+        python-version: '3.11' 
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
diff --git a/docs/source/conf.py b/docs/source/conf.py
index fc530e3a..deca59dd 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -24,7 +24,7 @@
 # The full version, including alpha/beta/rc tags
 # TODO: it would be great to have a common versioning, but right now it would require importing neofox here which does
 # TODO: not work in readthedocs environment
-release = "1.2.0"
+release = "1.2.1"
 
 
 # -- General configuration ---------------------------------------------------
diff --git a/pyproject.toml b/pyproject.toml
index 91d18c0d..9fd280ab 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "neofox"
-version = "1.2.0"
+version = "1.2.1"
 description = "NEOantigen Feature tOolboX"
 authors = [
     "TRON - Translational Oncology at the University Medical Center",