diff --git a/.github/workflows/build-and-push-to-docker.yml b/.github/workflows/build-and-push-to-docker.yml
index 9ef990bd..1e20ff9e 100644
--- a/.github/workflows/build-and-push-to-docker.yml
+++ b/.github/workflows/build-and-push-to-docker.yml
@@ -56,17 +56,21 @@ jobs:
     strategy:
       fail-fast: true
       matrix:
-        BASE_PYTHON_VERSION:
-          - "3.10"
-          - "3.9"
-          - "3.8"
+        include:
+        - BASE_PYTHON_VERSION: "3.11"
+          REGISTRY: quay.io
+        - BASE_PYTHON_VERSION: "3.10"
+          REGISTRY: docker.io
+        - BASE_PYTHON_VERSION: "3.9"
+          REGISTRY: docker.io
+        - BASE_PYTHON_VERSION: "3.8"
+          REGISTRY: docker.io
     steps:
       - name: Docker Login
         uses: Azure/docker-login@v1
         with:
           username: ${{ secrets.RENKU_DOCKER_USERNAME }}
           password: ${{ secrets.RENKU_DOCKER_PASSWORD }}
-
       - uses: actions/checkout@v4
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v3.0.0
@@ -348,10 +352,13 @@ jobs:
     strategy:
       fail-fast: true
       matrix:
-        EXTENSION:
-          - vnc
-          - batch
-
+        include:
+          - EXTENSION: vnc
+            PYTHON_VERSION: "3.10"
+          - EXTENSION: vnc
+            PYTHON_VERSION: "3.11"
+          - EXTENSION: batch
+            PYTHON_VERSION: "3.10"
     steps:
       - name: Docker Login
         uses: Azure/docker-login@v1
@@ -390,7 +397,7 @@ jobs:
           tags: ${{ steps.meta.outputs.tags }}
           cache-from: type=gha
           provenance: false
-
+          
   build-vnc-ext:
     needs: build-py-ext
     runs-on: ubuntu-latest
diff --git a/docker/py/Dockerfile b/docker/py/Dockerfile
index 962a5282..cf785db4 100644
--- a/docker/py/Dockerfile
+++ b/docker/py/Dockerfile
@@ -21,8 +21,8 @@ RUN python3 -m pip install --no-cache-dir -U pip && \
     rm -rf "/home/${NB_USER}/.cache"
 
 # jupyter sets channel priority to strict which often causes very long error messages
-RUN mamba config --system --set channel_priority flexible && \
-    mamba clean --all -f -y
+RUN conda config --system --set channel_priority flexible && \
+    conda clean --all -f -y
 
 COPY renku-requirements/requirements.txt /tmp/renku-requirements.txt
 
diff --git a/docker/py/requirements.txt b/docker/py/requirements.txt
index 6271b968..3a917506 100644
--- a/docker/py/requirements.txt
+++ b/docker/py/requirements.txt
@@ -5,7 +5,7 @@ jupyter-server-proxy==4.1.2
 jupyterlab-git==0.50.0
 jupyterlab-system-monitor~=0.8.0
 mistune>=2.0.1 # not directly required, pinned by Snyk to avoid a vulnerability
-papermill~=2.5.0
+papermill~=2.6.0
 requests>=2.20.0
 setuptools>=65.5.1 # not directly required, pinned by Snyk to avoid a vulnerability
 virtualenv>=20.7.2