diff --git a/bashcached b/bashcached
index 6dbb8e8..52a95f7 100755
--- a/bashcached
+++ b/bashcached
@@ -10,7 +10,7 @@
 #   --check=CHECK            interval to check each cache's expire (default: 60)
 #   --help                   show this help
 #   --version                show bashcached's version
-IFS=$' \t\r' VERSION=3.1.1-bashcached; export LANG=C
+IFS=$' \t\r' VERSION=4.0.0-bashcached; export LANG=C
 
 if [[ -p "$BASHCACHED_PIPE" ]]; then
   send="$(mktemp -u)"; mkfifo -m 600 "$send"