diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 4260a05..fc070a8 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -8,7 +8,7 @@ on:
 
 jobs:
   test:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
 
     services:
       postgres:
@@ -38,9 +38,9 @@ jobs:
           path: euctr-tracker-data
 
       - name: Install Python 3
-        uses: actions/setup-python@v5
+        uses: deadsnakes/action@e640ac8743173a67cca4d7d77cd837e514bf98e8 # v3.2.0
         with:
-          python-version: "3.6.15"
+          python-version: "3.6"
 
       - name: Install dependencies
         run: |
diff --git a/requirements.txt b/requirements.txt
index 4f29e0c..4fa6dfd 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -28,4 +28,4 @@ opentelemetry_api==1.9.1
 opentelemetry-sdk==1.9.1
 opentelemetry-exporter-otlp-proto-grpc==1.9.1
 pyOpenSSL==22.0.0
-cryptography==38.0.4
+cryptography==37.0.4