diff --git a/lib/history.zsh b/lib/history.zsh
index 0f04de215..0ee8cfe7a 100644
--- a/lib/history.zsh
+++ b/lib/history.zsh
@@ -27,8 +27,8 @@ esac
 
 ## History file configuration
 [ -z "$HISTFILE" ] && HISTFILE="$HOME/.zsh_history"
-HISTSIZE=50000
-SAVEHIST=10000
+[ "$HISTSIZE" -lt 50000 ] && HISTSIZE=50000
+[ "$SAVEHIST" -lt 10000 ] && SAVEHIST=10000
 
 ## History command configuration
 setopt extended_history       # record timestamp of command in HISTFILE