diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 4c4202b..eedd2e1 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -12,7 +12,7 @@ on:
 
 jobs:
   build:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
     steps:
       - name: Checkout
         uses: actions/checkout@v4
@@ -35,7 +35,8 @@ jobs:
       - name: Install system dependencies
         run: |
           sudo apt-get install software-properties-common
-          sudo add-apt-repository ppa:ubuntugis/ppa
+          sudo add-apt-repository ppa:ubuntugis/ubuntugis-unstable
+          sudo apt update
           sudo apt-get install geos
 
       - name: Install the project
diff --git a/.github/workflows/documentation.yaml b/.github/workflows/documentation.yaml
index ad4ff02..71652ce 100644
--- a/.github/workflows/documentation.yaml
+++ b/.github/workflows/documentation.yaml
@@ -16,7 +16,7 @@ concurrency:
 
 jobs:
   docs:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
 
     environment:
       name: github-pages
@@ -50,7 +50,8 @@ jobs:
       - name: Install system dependencies
         run: |
           sudo apt-get install software-properties-common
-          sudo add-apt-repository ppa:ubuntugis/ppa
+          sudo add-apt-repository ppa:ubuntugis/ubuntugis-unstable
+          sudo apt update
           sudo apt-get install geos
 
       - name: Install the project