diff --git a/scope b/scope
index 9f241c8ad..cb125a2f0 100755
--- a/scope
+++ b/scope
@@ -35,7 +35,7 @@ shift 1
 MIN_DOCKER_VERSION=1.5.0
 
 check_docker_version() {
-    if ! DOCKER_VERSION=$(docker -v | sed -n -e 's|^Docker version \([0-9][0-9]*\.[0-9][0-9]*\.[0-9][0-9]*\).*|\1|p') || [ -z "$DOCKER_VERSION" ] ; then
+    if ! DOCKER_VERSION=$(docker -v | grep -oE "[0-9]+\.[0-9]+\.[0-9]+") || [ -z "$DOCKER_VERSION" ] ; then
         echo "ERROR: Unable to parse docker version" >&2
         exit 1
     fi