diff --git a/zsh/zshrc b/zsh/zshrc
index 913d4c9..832e745 100644
--- a/zsh/zshrc
+++ b/zsh/zshrc
@@ -33,6 +33,26 @@ fi
 source $yadr/zsh/aliases
 source $yadr/zsh/zsh_aliases
 
+# RVM / rbenv
+if [[ -d ~/.rvm/ ]] && [[ -d ~/.rbenv/ ]]; then
+  # TODO: colorize
+  echo '***************************************************************'
+  echo 'ERROR!'
+  echo 'YADR found both ~/.rvm and ~/.rbenv directories. You cannot use'
+  echo 'RVM and rbenv simultaneously. Please delete one and reload zsh.'
+  echo '***************************************************************'
+  echo ''
+else
+  if [[ -d ~/.rvm/ ]]; then
+    echo 'found RVM'
+    [[ -s "$HOME/.rvm/scripts/rvm" ]] && source "$HOME/.rvm/scripts/rvm"
+  fi
+  if [[ -d ~/.rbenv/ ]]; then
+    echo 'found rbenv'
+    eval "$(rbenv init -)"
+  fi
+fi
+
 # ------------------
 # zsh/after
 # ==================