diff --git a/docker-compose.example.yml b/docker-compose.example.yml
index 3c7c2f4..589049f 100644
--- a/docker-compose.example.yml
+++ b/docker-compose.example.yml
@@ -14,6 +14,7 @@ services:
             - /tmp
             - /judger_run:exec,mode=777
             - /spj:exec,mode=777
+            - /dev/shm:mode=777
         volumes:
             - $PWD/tests/test_case:/test_case:ro
             - $PWD/log:/log