diff --git a/app/build.gradle b/app/build.gradle
index 0bd8e5a..5f81937 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -57,6 +57,7 @@
     compile "android.arch.lifecycle:extensions:1.0.0"
     annotationProcessor "android.arch.lifecycle:compiler:1.0.0"
 
+    // Rx
     implementation "io.reactivex.rxjava2:rxjava:$rx_java_version"
     implementation "io.reactivex.rxjava2:rxandroid:$rx_android_version"