diff --git a/backends/piston/docker-compose.yml b/backends/piston/docker-compose.yml
index c3626c69..3e96207b 100644
--- a/backends/piston/docker-compose.yml
+++ b/backends/piston/docker-compose.yml
@@ -11,8 +11,8 @@ services:
         sed -i "s/app.use(body_parser.json());/app.use(body_parser.json({ limit: '50mb' }));/" /piston_api/src/index.js
         exec /piston_api/src/docker-entrypoint.sh
     environment:
-      - PISTON_RUN_TIMEOUT=50000
-      - PISTON_RUN_CPU_TIME=50000
+      - PISTON_RUN_TIMEOUT=20000
+      - PISTON_RUN_CPU_TIME=20000
       - PISTON_MAX_FILE_SIZE=50000000
       - PISTON_OUTPUT_MAX_SIZE=10485760
       - PISTON_MAX_CONCURRENT_JOBS=200