diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 17c5b57..335460f 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -12,7 +12,6 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
-      - uses: actions/setup-python@v4
       - name: Build
         run: |
           docker build -t octave .
diff --git a/Dockerfile b/Dockerfile
index 02cff19..be3e5a6 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:18.04
+FROM ubuntu:22.04
 MAINTAINER ome-devel@lists.openmicroscopy.org.uk
 
 ENV DEBIAN_FRONTEND noninteractive