diff --git a/build.gradle b/build.gradle
index 981bab596c..dbc8a41eb0 100644
--- a/build.gradle
+++ b/build.gradle
@@ -16,8 +16,8 @@ buildscript {
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:2.3.1'
-        classpath 'com.novoda:bintray-release:0.4.0'
+        classpath 'com.android.tools.build:gradle:2.3.3'
+        classpath 'com.novoda:bintray-release:0.5.0'
     }
     // Workaround for the following test coverage issue. Remove when fixed:
     // https://code.google.com/p/android/issues/detail?id=226070
@@ -31,6 +31,9 @@ buildscript {
 allprojects {
     repositories {
         jcenter()
+        maven {
+            url "https://maven.google.com"
+        }
     }
     project.ext {
         exoplayerPublishEnabled = true
diff --git a/constants.gradle b/constants.gradle
index df5cf900a1..a877f8bd59 100644
--- a/constants.gradle
+++ b/constants.gradle
@@ -21,11 +21,11 @@ project.ext {
     targetSdkVersion = 25
     buildToolsVersion = '25'
     testSupportLibraryVersion = '0.5'
-    supportLibraryVersion = '25.3.1'
+    supportLibraryVersion = '25.4.0'
     dexmakerVersion = '1.2'
     mockitoVersion = '1.9.5'
     releaseVersion = 'r2.4.3'
-    modulePrefix = ':';
+    modulePrefix = ':'
     if (gradle.ext.has('exoplayerModulePrefix')) {
         modulePrefix += gradle.ext.exoplayerModulePrefix
     }
diff --git a/extensions/ima/build.gradle b/extensions/ima/build.gradle
index b2dd2ab97b..7732751296 100644
--- a/extensions/ima/build.gradle
+++ b/extensions/ima/build.gradle
@@ -16,7 +16,7 @@ dependencies {
     compile project(modulePrefix + 'library-core')
     compile 'com.android.support:support-annotations:' + supportLibraryVersion
     compile 'com.google.ads.interactivemedia.v3:interactivemedia:3.7.4'
-    compile 'com.google.android.gms:play-services-ads:11.0.1'
+    compile 'com.google.android.gms:play-services-ads:11.0.2'
     androidTestCompile project(modulePrefix + 'library')
     androidTestCompile 'com.google.dexmaker:dexmaker:' + dexmakerVersion
     androidTestCompile 'com.google.dexmaker:dexmaker-mockito:' + dexmakerVersion
diff --git a/extensions/okhttp/build.gradle b/extensions/okhttp/build.gradle
index 0aba07d118..bc9e0eba3e 100644
--- a/extensions/okhttp/build.gradle
+++ b/extensions/okhttp/build.gradle
@@ -31,7 +31,7 @@ android {
 
 dependencies {
     compile project(modulePrefix + 'library-core')
-    compile('com.squareup.okhttp3:okhttp:3.6.0') {
+    compile('com.squareup.okhttp3:okhttp:3.8.1') {
         exclude group: 'org.json'
     }
 }
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 8c0a9b91f6..fc42154505 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
-#Mon Mar 13 11:17:14 GMT 2017
+#Wed Jul 12 10:31:13 BST 2017
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-3.3-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.0.1-all.zip