diff --git a/plugins/common-aliases/common-aliases.plugin.zsh b/plugins/common-aliases/common-aliases.plugin.zsh
index fc19d73c3..c7aafd8b8 100644
--- a/plugins/common-aliases/common-aliases.plugin.zsh
+++ b/plugins/common-aliases/common-aliases.plugin.zsh
@@ -52,7 +52,7 @@ alias mv='mv -i'
 
 # zsh is able to auto-do some kungfoo
 # depends on the SUFFIX :)
-if [ ${ZSH_VERSION//\./} -ge 420 ]; then
+if is-at-least 4.2.0; then
   # open browser on urls
   _browser_fts=(htm html de org net com at cx nl se dk dk php)
   for ft in $_browser_fts ; do alias -s $ft=$BROWSER ; done