diff --git a/.env b/.env
index 4abc672..ff5c648 100644
--- a/.env
+++ b/.env
@@ -1,4 +1,4 @@
-COMPOSE_PROJECT_NAME=r2c-grav
+COMPOSE_PROJECT_NAME=r2c_grav
 
 PROJECT_ROOT=./public_html
 LOG_ROOT=./log