diff --git a/setup/INFRA_VERSION b/setup/INFRA_VERSION
index 633839829..49aa64d3e 100644
--- a/setup/INFRA_VERSION
+++ b/setup/INFRA_VERSION
@@ -3,4 +3,4 @@
 # If you change the infra version, be sure to put a warning
 # in the change log
 
-INFRA_VERSION=4
+INFRA_VERSION=5
diff --git a/src/apptask.js b/src/apptask.js
index 79a696a2f..f7075f6c2 100644
--- a/src/apptask.js
+++ b/src/apptask.js
@@ -204,7 +204,8 @@ function createContainer(app, callback) {
                 Volumes: {},
                 VolumesFrom: [],
                 Env: env.concat(addonEnv),
-                ExposedPorts: exposedPorts
+                ExposedPorts: exposedPorts,
+                CpuShares: 512 // relative to 1024 for system processes
             };
 
             debugApp(app, 'Creating container for %s', app.manifest.dockerImage);