diff --git a/app/build.gradle b/app/build.gradle
index 144bfbb..c8f9d88 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -101,6 +101,7 @@ dependencies {
     implementation 'com.google.firebase:firebase-ads:17.2.0'
     implementation 'com.android.billingclient:billing:1.2'
     implementation 'com.crashlytics.sdk.android:crashlytics:2.9.9'
+    implementation 'com.android.support:multidex:1.0.3'
     samsungImplementation project(":IAP5Helper")
 }
 
diff --git a/app/src/main/java/com/wbrawner/simplemarkdown/MarkdownApplication.java b/app/src/main/java/com/wbrawner/simplemarkdown/MarkdownApplication.java
index dee4463..6a3aecf 100644
--- a/app/src/main/java/com/wbrawner/simplemarkdown/MarkdownApplication.java
+++ b/app/src/main/java/com/wbrawner/simplemarkdown/MarkdownApplication.java
@@ -1,8 +1,8 @@
 package com.wbrawner.simplemarkdown;
 
-import android.app.Application;
+import android.support.multidex.MultiDexApplication;
 
-public class MarkdownApplication extends Application {
+public class MarkdownApplication extends MultiDexApplication {
 
     private AppComponent component;