upgrade Gradle wrapper
diff --git a/build.gradle b/build.gradle
index a453677..0b75976 100755
--- a/build.gradle
+++ b/build.gradle
@@ -427,7 +427,7 @@
 }
 
 task wrapper(type: Wrapper) {
-    gradleVersion = '4.3'
+    gradleVersion = '4.3.1'
     description "Regenerates the Gradle Wrapper files"
 }
 
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 92165ee..0e680f3 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -2,4 +2,4 @@
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.3-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.3.1-bin.zip
diff --git a/quickstart/filtered/archetype-resources/build.gradle b/quickstart/filtered/archetype-resources/build.gradle
index e9c946e..a6889a5 100644
--- a/quickstart/filtered/archetype-resources/build.gradle
+++ b/quickstart/filtered/archetype-resources/build.gradle
@@ -87,7 +87,7 @@
 }
 
 task wrapper(type: Wrapper) {
-    gradleVersion = '4.3'
+    gradleVersion = '4.3.1'
 }
 
 // TODO: Configure execution mode for jettyRun task