diff --git a/dot_zshrc b/dot_zshrc
index 1a4217b..eb5acb4 100644
--- a/dot_zshrc
+++ b/dot_zshrc
@@ -35,8 +35,8 @@ z4h init || return
 
 # Export environment variables.
 export GPG_TTY=$TTY
-export SAVEHIST=200000
-export HISTSIZE=200000
+export SAVEHIST=1048576
+export HISTSIZE=1048576
 export HISTFILE=$HOME/.cache/zsh/history
 export SPACEVIMDIR="$HOME/.config/spacevim/"
 export FZF_MARKS_FILE=$HOME/.config/fzfmarks