diff --git a/app/build.gradle b/app/build.gradle
index 8a6f831..99f795a 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -40,8 +40,9 @@
     kapt 'com.android.databinding:compiler:3.0.1'
 
     // Android Architecture Components for Lifecycles, LiveData, Room, and ViewModel
-    compile "android.arch.lifecycle:runtime:1.1.0"
-    compile "android.arch.lifecycle:extensions:1.1.0"
+    implementation "android.arch.lifecycle:runtime:1.1.0"
+    implementation "android.arch.lifecycle:extensions:1.1.0"
+    implementation "android.arch.lifecycle:reactivestreams:1.1.0"
     annotationProcessor "android.arch.lifecycle:compiler:1.1.0"
 
     implementation "android.arch.persistence.room:runtime:1.0.0"
@@ -58,7 +59,7 @@
     testAnnotationProcessor "com.google.dagger:dagger-compiler:$dagger_version"
 
     // Android Design Support Library
-    compile 'com.android.support:design:26.1.0'
+    implementation 'com.android.support:design:26.1.0'
 
     // RxJava
     implementation "io.reactivex.rxjava2:rxjava:2.1.7"
diff --git a/app/src/main/java/keijumt/todoapp/util/LiveDataReactiveStreamsExt.kt b/app/src/main/java/keijumt/todoapp/util/LiveDataReactiveStreamsExt.kt
new file mode 100644
index 0000000..4f1e741
--- /dev/null
+++ b/app/src/main/java/keijumt/todoapp/util/LiveDataReactiveStreamsExt.kt
@@ -0,0 +1,11 @@
+package keijumt.todoapp.util
+
+import android.arch.lifecycle.LiveData
+import android.arch.lifecycle.LiveDataReactiveStreams
+import org.reactivestreams.Publisher
+
+/**
+ * Created by matsumoto_k on 2018/03/09.
+ */
+
+fun <T> Publisher<T>.toLiveData() = LiveDataReactiveStreams.fromPublisher(this) as LiveData<T>