diff --git a/system_setup/logon_script.sh b/system_setup/logon_script.sh
index b3f1792..97c2b1a 100755
--- a/system_setup/logon_script.sh
+++ b/system_setup/logon_script.sh
@@ -17,6 +17,13 @@ if [ "$EUID" -eq 0 ]; then
     echo "Press any key to continue" && read -n 1 -s -r && exit 1
 fi
 
+#Check for needed python-modules
+python -c "import webdav3">/dev/null 2>&1
+if [[ $? -ne 0 ]]; then
+    echo "Installing pip module webdav3"
+    pip install webdavclient3>/dev/null
+fi
+
 #TODO C: Check if Desktop is KDE/Plasma and support other Displays
 # Make kdesu use sudo
 kwriteconfig5 --file kdesurc --group super-user-command --key super-user-command sudo