diff --git a/build.sbt b/build.sbt
index c71779d4..542d0dd8 100644
--- a/build.sbt
+++ b/build.sbt
@@ -95,7 +95,7 @@ lazy val warRunner_6_0 =
         ),
       crossPaths := false, // exclude Scala suffix from artifact names
       autoScalaLibrary := false, // exclude scala-library from dependencies
-      libraryDependencies += "com.heroku" % "webapp-runner" % "10.1.31.0"
+      libraryDependencies += "com.heroku" % "webapp-runner" % "10.1.33.0"
     )
 
 lazy val sbtWar =