diff --git a/ion/build.gradle b/ion/build.gradle
index 3a775b47..52ceaf63 100644
--- a/ion/build.gradle
+++ b/ion/build.gradle
@@ -35,6 +35,7 @@ android {
     defaultConfig {
         targetSdkVersion 23
         minSdkVersion 9
+        consumerProguardFiles 'proguard-project.txt'
     }
 
     compileSdkVersion 23
diff --git a/ion/proguard-project.txt b/ion/proguard-project.txt
index f2fe1559..55acc23b 100644
--- a/ion/proguard-project.txt
+++ b/ion/proguard-project.txt
@@ -18,3 +18,4 @@
 #-keepclassmembers class fqcn.of.javascript.interface.for.webview {
 #   public *;
 #}
+-keep class com.google.android.gms.security.ProviderInstaller { *; }