diff --git a/cmd/util.go b/cmd/util.go
index 113c4c5995c9f76a8fafd41395f36a22c87cd353..aa2baa0920b1c4e85518ca975dffd535939fb6f2 100644
--- a/cmd/util.go
+++ b/cmd/util.go
@@ -234,7 +234,7 @@ func getKubeVersion() string {
 	subs := serverVersionRe.FindStringSubmatch(string(out))
 	if len(subs) == 2 {
 		ver = string(subs[1])
-		validVersionPttn := `\d.\d`
+		validVersionPttn := `\d.\d.\d`
 		if matched, _ = regexp.MatchString(validVersionPttn, ver); !matched {
 			continueWithError(fmt.Errorf("%s: invalid server version ", ver), failmsg)
 		}