diff --git a/lib/history.zsh b/lib/history.zsh
index 876936b8..b162a557 100644
--- a/lib/history.zsh
+++ b/lib/history.zsh
@@ -3,7 +3,6 @@ HISTFILE=$HOME/.zsh_history
 HISTSIZE=10000
 SAVEHIST=10000
 
-setopt append_history
 setopt extended_history
 setopt hist_expire_dups_first
 setopt hist_ignore_dups # ignore duplication command history list