diff --git a/docker-update b/docker-update
index 29fdeee..18137c1 100755
--- a/docker-update
+++ b/docker-update
@@ -1,6 +1,7 @@
 #!/bin/bash
 
 limit=''
+force=''
 while test $# -gt 0; do
     case "$1" in
 	(-h|--help) cat <<EOF
@@ -10,6 +11,7 @@ OPTIONS
 
   -h, --help           show this help
   -s, --limit service  limit update to given service
+  -f, --force          force update
 
 FILES…
 
@@ -23,6 +25,7 @@ DESCRIPTION
 EOF
 		    exit;;
 	(-l|--limit) shift; limit=$1;;
+	(-f|--force) force='--force';;
 	(*) break;;
     esac
     if test $# -lt 1; then
@@ -43,7 +46,7 @@ for f in $*; do
 	IFS=" "
 	if [ -z "$limit" ] || [[ "${param}" =~ " ${name}_${limit}" ]]; then
 	    echo "....update $param: docker service update --image $param"
-	    docker service update --image $param
+	    docker service update $force --image $param
 	fi
     done
 done