diff --git a/scripts/travis/release/release-npm.sh b/scripts/travis/release/release-npm.sh
index eef85d202d..5e8886d281 100755
--- a/scripts/travis/release/release-npm.sh
+++ b/scripts/travis/release/release-npm.sh
@@ -4,11 +4,11 @@ DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
 
 cd $DIR/../../../
 
-if [ $TRAVIS_EVENT_TYPE == "push"  ] || [ $TRAVIS_EVENT_TYPE == "cron" ] || [ $TRAVIS_EVENT_TYPE == "api" ]
+if [[ $TRAVIS_EVENT_TYPE == "push"  ]] || [[ $TRAVIS_EVENT_TYPE == "cron" ]] || [[ $TRAVIS_EVENT_TYPE == "api" ]]
 then
     TAG_NPM=latest
 
-    if [ $TRAVIS_BRANCH =~ ^develop(-patch.*)?$ ] || [ $TRAVIS_EVENT_TYPE == "cron" ] || [ $TRAVIS_EVENT_TYPE == "api" ]
+    if [[ $TRAVIS_BRANCH =~ ^develop(-patch.*)?$ ]] || [[ $TRAVIS_EVENT_TYPE == "cron" ]] || [[ $TRAVIS_EVENT_TYPE == "api" ]]
     then
         TAG_NPM=alpha
     fi