diff --git a/common/build.sbt b/common/build.sbt
index 19e4f04..89b578d 100644
--- a/common/build.sbt
+++ b/common/build.sbt
@@ -22,6 +22,7 @@
 libraryDependencies ++= Seq(
   "io.spray"          %% "spray-can"     % "1.3.3",
   "io.spray"          %% "spray-routing" % "1.3.3",
+  "org.apache.commons" % "commons-lang3" % "3.5",
   "com.typesafe.akka" %% "akka-actor"    % akkaVersion.value,
   "com.typesafe.akka" %% "akka-slf4j"    % akkaVersion.value)