diff --git a/.util.sh b/.util.sh
index 97add44..5757404 100644
--- a/.util.sh
+++ b/.util.sh
@@ -4,8 +4,7 @@ update_github_tag() {
   local repo=$1
 
   ver=`curl -Ls https://api.github.com/repos/${repo}/tags | jq -r '.[0].name' | cut -c2-`
-  echo $ver
-  sed -i "s/pkgver=.*/pkgver=${ver}/" PKGBUILD
+  echo "$ver" | grep -Eq "^(\w|\+|\.)+$" && sed -i "s/pkgver=.*/pkgver=${ver}/" PKGBUILD
 }
 
 update_pkg() {
diff --git a/drone-runner-docker/update.sh b/drone-runner-docker/update.sh
index 1b828c1..0602f85 100755
--- a/drone-runner-docker/update.sh
+++ b/drone-runner-docker/update.sh
@@ -4,4 +4,4 @@ source ../.util.sh
 
 update_github_tag drone-runners/drone-runner-docker
 
-update_pkg
+[ $? -eq 0 ] && update_pkg
diff --git a/drone/update.sh b/drone/update.sh
index 5023e30..d1154c1 100755
--- a/drone/update.sh
+++ b/drone/update.sh
@@ -4,4 +4,4 @@ source ../.util.sh
 
 update_github_tag drone/drone
 
-update_pkg
+[ $? -eq 0 ] && update_pkg
diff --git a/k3s-bin/update.sh b/k3s-bin/update.sh
index f0854ad..13a14d7 100755
--- a/k3s-bin/update.sh
+++ b/k3s-bin/update.sh
@@ -4,4 +4,4 @@ source ../.util.sh
 
 update_github_tag rancher/k3s
 
-update_pkg
+[ $? -eq 0 ] && update_pkg