diff --git a/README.md b/README.md
index 1df7fce..a67704b 100644
--- a/README.md
+++ b/README.md
@@ -13,7 +13,7 @@ simplicity, showing information only when it's relevant.
 
 It currently shows:
 - Current Python virtualenv
-- Current Ruby version using Rbenv; version and gemset when on RVM
+- Current Ruby version using Rbenv or chruby; version and gemset when on RVM
 - Current Node.js version, through NVM
 - Git status
 - Timestamp
diff --git a/bullet-train.zsh-theme b/bullet-train.zsh-theme
index 4b3f006..919b5d7 100644
--- a/bullet-train.zsh-theme
+++ b/bullet-train.zsh-theme
@@ -337,19 +337,20 @@ prompt_dir() {
 # RUBY
 # RVM: only shows RUBY info if on a gemset that is not the default one
 # RBENV: shows current ruby version active in the shell
+# CHRUBY: shows current ruby version active in the shell
 prompt_ruby() {
   if [[ $BULLETTRAIN_RUBY_SHOW == false ]]; then
     return
   fi
 
-  if which rvm-prompt &> /dev/null; then
+  if command -v rvm-prompt > /dev/null 2>&1; then
     if [[ ! -n $(rvm gemset list | grep "=> (default)") ]]
     then
       prompt_segment $BULLETTRAIN_RUBY_BG $BULLETTRAIN_RUBY_FG $BULLETTRAIN_RUBY_PREFIX"  $(rvm-prompt i v g)"
     fi
-  elif which chruby &> /dev/null; then
+  elif command -v chruby > /dev/null 2>&1; then
     prompt_segment $BULLETTRAIN_RUBY_BG $BULLETTRAIN_RUBY_FG $BULLETTRAIN_RUBY_PREFIX"  $(chruby | sed -e 's/ \* //')"
-  elif which rbenv &> /dev/null; then
+  elif command -v rbenv > /dev/null 2>&1; then
     prompt_segment $BULLETTRAIN_RUBY_BG $BULLETTRAIN_RUBY_FG $BULLETTRAIN_RUBY_PREFIX"  $(rbenv version | sed -e 's/ (set.*$//')"
   fi
 }