diff --git a/README b/README
index a7d77da..2d97e14 100644
--- a/README
+++ b/README
@@ -8,7 +8,7 @@ DESCRIPTION
   Converts an image to map tiles to be used in Google Maps, Leaflet and other
   map rendering software.
 
-  Version:   v4.0.0
+  Version:   v4.0.1
   Homepage:  https://github.com/jahed/maptiles
   Donate:    https://jahed.dev/donate
 
diff --git a/maptiles b/maptiles
index d944bf7..5d74428 100755
--- a/maptiles
+++ b/maptiles
@@ -2,7 +2,7 @@
 set -eo pipefail
 
 name="maptiles"
-version="v4.0.0"
+version="v4.0.1"
 
 function print_help {
   cat <<EOF