diff --git a/.github/workflows/lichen_ci.yml b/.github/workflows/lichen_ci.yml
index 6733e94..792f2e4 100644
--- a/.github/workflows/lichen_ci.yml
+++ b/.github/workflows/lichen_ci.yml
@@ -26,7 +26,7 @@ jobs:
           python3 -m unittest discover
 
   test-lichen-integration:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     steps:
       - uses: actions/checkout@v2
       - name: Install Lichen
diff --git a/.github/workflows/pylint.yml b/.github/workflows/pylint.yml
index 49bcac3..82d149e 100644
--- a/.github/workflows/pylint.yml
+++ b/.github/workflows/pylint.yml
@@ -9,7 +9,7 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions/setup-python@v2
         with:
-          python-version: '3.10'
+          python-version: '3.9'
       - name: Cache Pip
         uses: actions/cache@v2
         with:
diff --git a/Dockerfile b/Dockerfile
index db3eb15..ce82ccb 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -6,7 +6,7 @@ ARG DEBIAN_FRONTEND=noninteractive
 RUN apt-get update \
     && apt-get install -y \
        libboost-all-dev \
-       python3.10 \
+       python3.9 \
        python3-pip \
        clang-14 \
        default-jdk