diff --git a/semaphore/docker-compose.yml b/semaphore/docker-compose.yml
index 14ed757..dda1487 100644
--- a/semaphore/docker-compose.yml
+++ b/semaphore/docker-compose.yml
@@ -6,6 +6,8 @@ services:
     ports:
       - 3000:3000
     environment:
+      TZ: America/Detroit
+      SEMAPHORE_SCHEDULE_TIMEZONE: "America/Detroit"
       SEMAPHORE_DB_USER: "${semaphore_db_user}"
       SEMAPHORE_DB_PASS: "${semaphore_db_pass}"
       SEMAPHORE_DB_HOST: "${semaphore_db_host}"