diff --git a/letsencrypt-auto-source/letsencrypt-auto b/letsencrypt-auto-source/letsencrypt-auto
index 86367a5c0..415bcbbc7 100755
--- a/letsencrypt-auto-source/letsencrypt-auto
+++ b/letsencrypt-auto-source/letsencrypt-auto
@@ -19,7 +19,7 @@ XDG_DATA_HOME=${XDG_DATA_HOME:-~/.local/share}
 VENV_NAME="letsencrypt"
 VENV_PATH=${VENV_PATH:-"$XDG_DATA_HOME/$VENV_NAME"}
 VENV_BIN="$VENV_PATH/bin"
-LE_AUTO_VERSION="0.4.1"
+LE_AUTO_VERSION="0.5.0.dev0"
 
 # This script takes the same arguments as the main letsencrypt program, but it
 # additionally responds to --verbose (more output) and --debug (allow support