diff --git a/libozsh.zsh b/libozsh.zsh
index 3165882..e63b2c0 100644
--- a/libozsh.zsh
+++ b/libozsh.zsh
@@ -47,7 +47,7 @@ function ozsh_update {
 		git -C $d pull --rebase
 	done
 
-	echo $(date) > "$OZSH_LASTUPDATE_FILE"
+	echo $(date +%Y-%m-%d) > "$OZSH_LASTUPDATE_FILE"
 }
 
 function ozsh_autoupdate {
@@ -81,4 +81,5 @@ function ozsh_init {
 ozsh_init
 
 # undefine functions
-unset -f ozsh_init
\ No newline at end of file
+unset -f ozsh_init
+unset -f ozsh_autoupdate
\ No newline at end of file