diff --git a/demos/build.gradle b/demos/build.gradle
index 2b1387e40d..436709308a 100644
--- a/demos/build.gradle
+++ b/demos/build.gradle
@@ -1,10 +1,14 @@
 plugins {
-  id 'org.akhikhl.gretty' version '2.0.0' apply false
+  id 'org.gretty' version '2.1.0' apply false
 }
 
 subprojects {
   apply plugin: 'war'
-  apply plugin: 'org.akhikhl.gretty'
+  apply plugin: 'org.gretty'
+
+  repositories {
+    jcenter()
+  }
 
   gretty {
     httpPort = 8080
diff --git a/gradle/wrapper/gradle-wrapper.jar b/gradle/wrapper/gradle-wrapper.jar
index c44b679acd..f6b961fd5a 100644
Binary files a/gradle/wrapper/gradle-wrapper.jar and b/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 568c50bf3a..7631b873a5 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,5 +1,6 @@
+#Tue Mar 20 12:42:36 EDT 2018
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.5.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.6-all.zip