diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
index 06e6ea79..3b778eea 100644
--- a/.github/workflows/build.yaml
+++ b/.github/workflows/build.yaml
@@ -9,7 +9,7 @@ on:
 
 jobs:
   lint:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     timeout-minutes: 5
     steps:
       - name: Checkout repository
@@ -24,7 +24,7 @@ jobs:
             --no-warnings images/charmed-spark-gpu/rockcraft.yaml
 
   build:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     timeout-minutes: 30
     needs:
       - lint
diff --git a/.github/workflows/build_gpu.yaml b/.github/workflows/build_gpu.yaml
index edc474fe..4b473269 100644
--- a/.github/workflows/build_gpu.yaml
+++ b/.github/workflows/build_gpu.yaml
@@ -5,7 +5,7 @@ on:
 
 jobs:
   lint:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     timeout-minutes: 5
     steps:
       - name: Checkout repository
@@ -18,7 +18,7 @@ jobs:
             --no-warnings images/charmed-spark-gpu/rockcraft.yaml
 
   build:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     timeout-minutes: 30
     needs:
       - lint
diff --git a/.github/workflows/integration.yaml b/.github/workflows/integration.yaml
index 288614f4..6f7dab58 100644
--- a/.github/workflows/integration.yaml
+++ b/.github/workflows/integration.yaml
@@ -12,7 +12,7 @@ jobs:
   build-rock:
     uses: ./.github/workflows/build.yaml
   integration:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     timeout-minutes: 120
     needs: build-rock
     strategy:
diff --git a/.github/workflows/publish.yaml b/.github/workflows/publish.yaml
index 3d7bc8ad..128fc64b 100644
--- a/.github/workflows/publish.yaml
+++ b/.github/workflows/publish.yaml
@@ -6,7 +6,7 @@ on:
 
 jobs:
   release_checks:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     steps:
     - name: Checkout repository
       uses: actions/checkout@v4
@@ -53,7 +53,7 @@ jobs:
 
   publish:
     needs: [tests, release_checks, tests-gpu]
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
diff --git a/images/charmed-spark-gpu/rockcraft.yaml b/images/charmed-spark-gpu/rockcraft.yaml
index 084f3cb1..6db5cf39 100644
--- a/images/charmed-spark-gpu/rockcraft.yaml
+++ b/images/charmed-spark-gpu/rockcraft.yaml
@@ -52,8 +52,8 @@ services:
 parts:
   spark:
     plugin: dump
-    source: https://github.com/canonical/central-uploader/releases/download/spark-3.4.2-ubuntu8/spark-3.4.2-ubuntu8-20241128203809-bin-k8s.tgz
-    source-checksum: sha512/6a5d2a10d00b2ba4af6a460323aba3a2f143d3bc23bc56dc6f9c414fe41c02bb8913a03c88e32546036cb87614cf213badfa00625df5b49f9c8881efdc643343
+    source: https://github.com/canonical/central-uploader/releases/download/spark-3.4.2-ubuntu9/spark-3.4.2-ubuntu9-20241220171019-bin-k8s.tgz
+    source-checksum: sha512/ea87a4f6919207d6c63a5c7751638cceee6044da2d8bc16726f3361d5dc284f5badcb1b79751e10f8186c276410da9d45bd22b8787278531662ef6340933bcc1
     overlay-script: |
       sed -i 's/http:\/\/deb.\(.*\)/https:\/\/deb.\1/g' /etc/apt/sources.list
       apt-get update
diff --git a/images/charmed-spark/rockcraft.yaml b/images/charmed-spark/rockcraft.yaml
index dd75ad8d..e1ec969b 100644
--- a/images/charmed-spark/rockcraft.yaml
+++ b/images/charmed-spark/rockcraft.yaml
@@ -51,8 +51,8 @@ services:
 parts:
   spark:
     plugin: dump
-    source: https://github.com/canonical/central-uploader/releases/download/spark-3.4.2-ubuntu8/spark-3.4.2-ubuntu8-20241128203809-bin-k8s.tgz
-    source-checksum: sha512/6a5d2a10d00b2ba4af6a460323aba3a2f143d3bc23bc56dc6f9c414fe41c02bb8913a03c88e32546036cb87614cf213badfa00625df5b49f9c8881efdc643343
+    source: https://github.com/canonical/central-uploader/releases/download/spark-3.4.2-ubuntu9/spark-3.4.2-ubuntu9-20241220171019-bin-k8s.tgz
+    source-checksum: sha512/ea87a4f6919207d6c63a5c7751638cceee6044da2d8bc16726f3361d5dc284f5badcb1b79751e10f8186c276410da9d45bd22b8787278531662ef6340933bcc1
     overlay-script: |
       sed -i 's/http:\/\/deb.\(.*\)/https:\/\/deb.\1/g' /etc/apt/sources.list
       apt-get update