diff --git a/app/build.gradle b/app/build.gradle
index c9f917f..355f19f 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -96,7 +96,7 @@ dependencies {
     implementation 'com.github.wada811:DataBinding-ktx:6.1.0'
 
     // rx
-    implementation 'io.reactivex.rxjava3:rxjava:3.0.6'
+    implementation 'io.reactivex.rxjava3:rxjava:3.1.5'
     implementation 'io.reactivex.rxjava3:rxandroid:3.0.0'
     implementation 'io.reactivex.rxjava3:rxkotlin:3.0.1'