diff --git a/constants.gradle b/constants.gradle
index 32210bc95c..ea0c2436c0 100644
--- a/constants.gradle
+++ b/constants.gradle
@@ -25,7 +25,7 @@ project.ext {
     buildToolsVersion = '27.0.3'
     testSupportLibraryVersion = '0.5'
     supportLibraryVersion = '27.0.0'
-    playServicesLibraryVersion = '11.4.2'
+    playServicesLibraryVersion = '12.0.0'
     dexmakerVersion = '1.2'
     mockitoVersion = '1.9.5'
     junitVersion = '4.12'
diff --git a/extensions/cast/build.gradle b/extensions/cast/build.gradle
index d7e99573cb..ded92000d3 100644
--- a/extensions/cast/build.gradle
+++ b/extensions/cast/build.gradle
@@ -30,9 +30,9 @@ dependencies {
     // com.android.support:support-v4, com.android.support:appcompat-v7 and
     // com.android.support:mediarouter-v7 to be used. Else older versions are
     // used, for example:
-    // com.google.android.gms:play-services-cast-framework:11.4.2
-    // |-- com.google.android.gms:play-services-basement:11.4.2
-    //   |-- com.android.support:support-v4:25.2.0
+    // com.google.android.gms:play-services-cast-framework:12.0.0
+    // |-- com.google.android.gms:play-services-basement:12.0.0
+    //   |-- com.android.support:support-v4:26.1.0
     api 'com.android.support:support-v4:' + supportLibraryVersion
     api 'com.android.support:appcompat-v7:' + supportLibraryVersion
     api 'com.android.support:mediarouter-v7:' + supportLibraryVersion
diff --git a/extensions/ima/build.gradle b/extensions/ima/build.gradle
index 1a35ad3450..3529e05380 100644
--- a/extensions/ima/build.gradle
+++ b/extensions/ima/build.gradle
@@ -29,12 +29,12 @@ dependencies {
     // This dependency is necessary to force the supportLibraryVersion of
     // com.android.support:support-v4 to be used. Else an older version (25.2.0)
     // is included via:
-    // com.google.android.gms:play-services-ads:11.4.2
-    // |-- com.google.android.gms:play-services-ads-lite:11.4.2
-    //   |-- com.google.android.gms:play-services-basement:11.4.2
-    //     |-- com.android.support:support-v4:25.2.0
+    // com.google.android.gms:play-services-ads:12.0.0
+    // |-- com.google.android.gms:play-services-ads-lite:12.0.0
+    //   |-- com.google.android.gms:play-services-basement:12.0.0
+    //     |-- com.android.support:support-v4:26.1.0
     api 'com.android.support:support-v4:' + supportLibraryVersion
-    api 'com.google.ads.interactivemedia.v3:interactivemedia:3.7.4'
+    api 'com.google.ads.interactivemedia.v3:interactivemedia:3.8.5'
     implementation project(modulePrefix + 'library-core')
     implementation 'com.google.android.gms:play-services-ads:' + playServicesLibraryVersion
 }