diff --git a/Dockerfile b/Dockerfile
index 672988b..f44d693 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -38,7 +38,7 @@ ARG BUILD_PHPMYADMIN_PW="phpmyadmin"
 ARG BUILD_PHPMYADMIN_USER="phpmyadmin"
 ARG BUILD_PRINTING="no"
 ARG BUILD_REDIS="yes"
-ARG BUILD_ROUNDCUBE_VERSION="1.3.10"
+ARG BUILD_ROUNDCUBE_VERSION="1.4.0"
 ARG BUILD_ROUNDCUBE_DB="roundcube"
 ARG BUILD_ROUNDCUBE_DIR="/opt/roundcube"
 ARG BUILD_ROUNDCUBE_PW="secretpassword"