diff --git a/spectrum/build.gradle b/spectrum/build.gradle
index 6f34022..2bf46a5 100644
--- a/spectrum/build.gradle
+++ b/spectrum/build.gradle
@@ -35,6 +35,7 @@ android {
         targetSdkVersion 23
         versionCode libraryVersionCode
         versionName libraryVersion
+        consumerProguardFiles 'proguard-rules.pro'
     }
     buildTypes {
         release {
diff --git a/spectrum/proguard-rules.pro b/spectrum/proguard-rules.pro
index 63c6e9f..0cbd084 100644
--- a/spectrum/proguard-rules.pro
+++ b/spectrum/proguard-rules.pro
@@ -15,3 +15,13 @@
 #-keepclassmembers class fqcn.of.javascript.interface.for.webview {
 #   public *;
 #}
+
+# From http://stackoverflow.com/a/31567519/3995632
+# Ensure annotations are kept for runtime use.
+-keepattributes *Annotation*
+# Don't remove any GreenRobot classes
+-keep class org.greenrobot.** {*;}
+# Don't remove any methods that have the @Subscribe annotation
+-keepclassmembers class ** {
+    @org.greenrobot.eventbus.Subscribe <methods>;
+}