diff --git a/api/src/job.js b/api/src/job.js
index 46efe27..a2641f9 100644
--- a/api/src/job.js
+++ b/api/src/job.js
@@ -221,7 +221,7 @@ class Job {
             proc.stderr.on('data', async data => {
                 if (event_bus !== null) {
                     event_bus.emit('stderr', data);
-                } else if (stderr.length > this.runtime.output_max_size) {
+                } else if ((stderr.length + data.length) > this.runtime.output_max_size) {
                     this.logger.info(`stderr length exceeded`);
                     try {
                         process.kill(proc.pid, 'SIGKILL');
@@ -242,7 +242,7 @@ class Job {
             proc.stdout.on('data', async data => {
                 if (event_bus !== null) {
                     event_bus.emit('stdout', data);
-                } else if (stdout.length > this.runtime.output_max_size) {
+                } else if ((stdout.length + data.length) > this.runtime.output_max_size) {
                     this.logger.info(`stdout length exceeded`);
                     try {
                         process.kill(proc.pid, 'SIGKILL');
diff --git a/docker-compose.dev.yaml b/docker-compose.dev.yaml
index 8a0d385..278ec96 100644
--- a/docker-compose.dev.yaml
+++ b/docker-compose.dev.yaml
@@ -11,8 +11,6 @@ services:
             - 2000:2000
         volumes:
             - ./data/piston/packages:/piston/packages
-        environment:
-            - PISTON_REPO_URL=http://repo:8000/index
         tmpfs:
             - /piston/jobs:exec,uid=1000,gid=1000,mode=711