diff --git a/app/build.gradle b/app/build.gradle
index 6e94961..552347a 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -60,7 +60,7 @@ dependencies {
     implementation 'com.squareup.retrofit2:retrofit:2.6.0'
     implementation 'com.squareup.retrofit2:adapter-rxjava2:2.5.0'
     implementation 'io.reactivex.rxjava2:rxandroid:2.1.1'
-    implementation 'io.reactivex.rxjava2:rxjava:2.2.9'
+    implementation 'io.reactivex.rxjava2:rxjava:2.2.21'
 
     //leak canary
     debugImplementation 'com.squareup.leakcanary:leakcanary-android:2.0-beta-2'