diff --git a/build.gradle b/build.gradle
index 149724f..f53851c 100644
--- a/build.gradle
+++ b/build.gradle
@@ -8,7 +8,7 @@ buildscript {
         versions.mockito = '1.9.5'
         versions.simplexml = '2.7.1'
         versions.slf4j = '1.7.25'
-        versions.sonar = '4.5.4'
+        versions.sonar = '5.1'
         versions.sonarJava = '2.1'
         versions.sslrSquidBridge = '2.6'
         versions.staxmate = '2.0.1'