diff --git a/update.sh b/update.sh
index 0c251f8..15b812c 100755
--- a/update.sh
+++ b/update.sh
@@ -561,6 +561,9 @@ perform_system_update() {
     if command -v flatpak &> /dev/null; then
         log_message "INFO" "Updating Flatpak packages..."
         flatpak update -y
+
+        log_message "INFO" "Cleaning up unused Flatpak runtimes..."
+        flatpak uninstall --unused -y
     fi
 
     if command -v snap &> /dev/null; then