diff --git a/pom.xml b/pom.xml
old mode 100755
new mode 100644
index bfb5caa1ce4..9c0fdf5f1d5
--- a/pom.xml
+++ b/pom.xml
@@ -53,7 +53,7 @@
         <jackson.version>2.8.11.1</jackson.version>
         <json-schema-validator.version>2.2.6</json-schema-validator.version>
         <scala.version>2.11</scala.version>
-        <akka.version>2.4.2</akka.version>
+        <akka.version>2.5.30</akka.version>
         <californium.version>1.0.2</californium.version>
         <gson.version>2.6.2</gson.version>
         <velocity.version>1.7</velocity.version>