diff --git a/heroku-deploy/src/main/java/com/heroku/sdk/deploy/DeployWar.java b/heroku-deploy/src/main/java/com/heroku/sdk/deploy/DeployWar.java
index <HASH>..<HASH> 100644
--- a/heroku-deploy/src/main/java/com/heroku/sdk/deploy/DeployWar.java
+++ b/heroku-deploy/src/main/java/com/heroku/sdk/deploy/DeployWar.java
@@ -11,7 +11,7 @@ import java.util.*;
 
 public class DeployWar extends WarApp {
 
-  public static final String DEFAULT_WEBAPP_RUNNER_VERSION = "8.5.15.1";
+  public static final String DEFAULT_WEBAPP_RUNNER_VERSION = "8.5.23.0";
 
   private static final String WEBAPP_RUNNER_URL_FORMAT="http://central.maven.org/maven2/com/github/jsimone/webapp-runner/%s/webapp-runner-%s.jar";
 
@@ -29,7 +29,7 @@ public class DeployWar extends WarApp {
       this(name, warFile, webappRunnerUrl);
       this.deployer.setEncodedApiKey(apiKey);
   }
-  
+
   @Override
   protected Map<String,String> defaultProcTypes() {
     Map<String,String> processTypes = new HashMap<String, String>();
Upgrade default Tomcat to <I>