diff --git a/build.gradle b/build.gradle
index 31199f3..f973588 100644
--- a/build.gradle
+++ b/build.gradle
@@ -11,7 +11,7 @@ buildscript {
 
   dependencies {
   	// usage: gradle dependencyUpdates -Drevision=release
-    classpath 'com.github.ben-manes:gradle-versions-plugin:0.19.0'
+    classpath 'com.github.ben-manes:gradle-versions-plugin:0.20.0'
   }
 }
 
@@ -51,5 +51,5 @@ subprojects {
 }
 
 task wrapper(type: Wrapper) {
-    gradleVersion = '4.8'
+    gradleVersion = '4.9'
 }
diff --git a/gradle/wrapper/gradle-wrapper.jar b/gradle/wrapper/gradle-wrapper.jar
index 91ca28c..1948b90 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 d2c45a4..a95009c 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.8-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.9-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
diff --git a/performanceDb/build.gradle b/performanceDb/build.gradle
index d3f2006..042bd65 100644
--- a/performanceDb/build.gradle
+++ b/performanceDb/build.gradle
@@ -4,7 +4,7 @@ dependencies {
 	compile project(':data-store')
 	compile project(':file-utils')
 	compile 'com.fasterxml.jackson.core:jackson-databind:2.9.6'
-	compile 'org.apache.commons:commons-collections4:4.1'
+	compile 'org.apache.commons:commons-collections4:4.2'
 	
 	
 	compile 'org.apache.logging.log4j:log4j-api:2.10.0'