diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index b9cd36f..b5f1f1a 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -21,7 +21,7 @@ jobs:
 
     - name: Install dependencies
       run: |
-        sudo add-apt-repository ppa:ubuntugis/ppa 
+        sudo add-apt-repository ppa:ubuntugis/ubuntugis-unstable
         sudo apt-get update
         sudo apt-get install gdal-bin libgdal-dev
         sudo apt-get install libgtk-4-dev libgtk-4-1
diff --git a/requirements.txt b/requirements.txt
index 82cc96c..af03177 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -12,4 +12,4 @@ numpy
 nmeatoolkit
 matplotlib
 weatherrouting
-GDAL==3.6.4
\ No newline at end of file
+GDAL==3.9.1
\ No newline at end of file