diff --git a/antigen.zsh b/antigen.zsh
index 7515513..65e2860 100644
--- a/antigen.zsh
+++ b/antigen.zsh
@@ -72,6 +72,7 @@ bundle-install () {
 
     if [[ $1 == --update ]]; then
         local update=true
+        shift
     else
         local update=false
     fi