diff --git a/build.gradle b/build.gradle
index feda3c0..fd77a78 100644
--- a/build.gradle
+++ b/build.gradle
@@ -14,7 +14,7 @@ buildscript {
 }
 
 plugins {
-	id "org.sonarqube" version "1.2"
+	id "org.sonarqube" version "2.2"
 }
 
 group = 'org.springframework.session'
diff --git a/docs/src/main/java/README.adoc b/docs/src/main/java/README.adoc
new file mode 100644
index 0000000..49eff9d
--- /dev/null
+++ b/docs/src/main/java/README.adoc
@@ -0,0 +1 @@
+This exists for Sonar
\ No newline at end of file