diff --git a/bin/release b/bin/release
index 8b25d53..c3cbcdd 100755
--- a/bin/release
+++ b/bin/release
@@ -36,22 +36,25 @@ cmpnt_ver=$(find . -maxdepth 1 -name "component.json" | xargs cat | jq -r ".vers
 pkg_ver=$(find . -maxdepth 1 -name "package.json" | xargs cat | jq -r ".version")
 
 # Non npm package 
-[ "$pkg_ver" == "0.0.0" ] && pkg=
+[ "$pkg_ver" == "0.0.0" ] && pkg_ver=
 
 # Verify current versions 
-current_ver=$jq_ver||$cmpnt_ver||$pck_ver
-[ "$current_ver" == "" ] && current_ver="0.0.1"
+current_ver=
+[ -n "$jq_ver" ] && current_ver="$jq_ver"
+[ -n "$cmpnt_ver" ] && current_ver="$cmpnt_ver"
+[ -n "$pkg_ver" ] && current_ver="$pkg_ver"
+[ -z "$current_ver" ] && current_ver="0.0.0"
 
 # Validate current versions and determine new version
 if [ "$1" == "major" ] || [ "$1" == "minor" ] || [ "$1" == "patch" ]; then
 	dont_match="Versions in *.jquery.json, component.json and package.json don’t match."
-	if [ "$jq_ver" != "" ] && [ "$current_ver" != "$jq_ver" ]; then error dont_match; fi
-	if [ "$cmpnt_ver" != "" ] && [ "$current_ver" != "$cmpnt_ver" ]; then error dont_match; fi
-	if [ "$pck_ver" != "" ] && [ "$current_ver" != "$pck_ver" ]; then error dont_match; fi
+	if [ -n "$jq_ver" ] && [ "$current_ver" != "$jq_ver" ]; then error $dont_match; fi
+	if [ -n "$cmpnt_ver" ] && [ "$current_ver" != "$cmpnt_ver" ]; then error $dont_match; fi
+	if [ -n "$pkg_ver" ] && [ "$current_ver" != "$pkg_ver" ]; then error $dont_match; fi
 else
 	new_ver="$1"
 fi
-if [ "$new_ver" == "" ]; then
+if [ -z "$new_ver" ]; then
 	[ "$1" == "patch" ] && new_ver=$(semver -p $current_ver)
 	[ "$1" == "minor" ] && new_ver=$(semver -n $current_ver)
 	[ "$1" == "major" ] && new_ver=$(semver -m $current_ver)
@@ -60,18 +63,18 @@ fi
 header "Releasing v$new_ver..."
 
 # Update component.json
-if [ "$cmpnt_ver" != "" ]; then
+if [ -n "$cmpnt_ver" ]; then
 	sed -i '' "s^$current_ver^$new_ver^" component.json
 fi
 
 # Update package.json
-if [ "$pck_ver" != "" ]; then
-	sed -i '' "s^$current_ver^$pck_ver^" package.json
+if [ -n "$pkg_ver" ]; then
+	sed -i '' "s^$current_ver^$new_ver^" package.json
 fi
 
 # Update *.jquery.json
-if [ "$jq_ver" != "" ]; then
-	find . -maxdepth 1 -name "*.jquery.json" | xargs sed -i '' "s^$current_ver^$jq_ver^"
+if [ -n "$jq_ver" ]; then
+	find . -maxdepth 1 -name "*.jquery.json" | xargs sed -i '' "s^$current_ver^$new_ver^"
 fi
 
 # Build files
@@ -91,7 +94,7 @@ git tag "v$new_ver"
 git push origin --tags
 
 # Publish npm package
-if [ "$pck_ver" != "" ]; then
+if [ -n "$pkg_ver" ]; then
 	npm publish
 fi