diff --git a/build.gradle b/build.gradle
index 7a47bbb..6012bce 100644
--- a/build.gradle
+++ b/build.gradle
@@ -16,7 +16,7 @@ allprojects {
 
             version_log4j = '2.19.0'
             version_jackson = '2.9.0'
-            version_retrofit = '2.1.0'
+            version_retrofit = '2.9.0'
             version_guava = '18.0'
             version_guice = '4.1.0'
             version_tyrus = '1.8.3'