diff --git a/salt/manager/tools/sbin/soup b/salt/manager/tools/sbin/soup
index 45e3df530..1251f9a57 100755
--- a/salt/manager/tools/sbin/soup
+++ b/salt/manager/tools/sbin/soup
@@ -434,7 +434,8 @@ post_to_2.4.10() {
 }
 
 post_to_2.4.20() {
-  echo "Nothing to apply"
+  echo "Pruning unused volumes"
+  docker volume prune -f
   POSTVERSION=2.4.20
 }