diff --git a/app/build.gradle b/app/build.gradle
index 4d05015..63ff55b 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -56,7 +56,7 @@ dependencies {
     annotationProcessor 'androidx.lifecycle:lifecycle-compiler:2.5.1'
 
     //rxjava2
-    implementation 'io.reactivex.rxjava2:rxjava:2.2.13'
+    implementation 'io.reactivex.rxjava2:rxjava:2.2.21'
     implementation 'io.reactivex.rxjava2:rxandroid:2.1.1'
     implementation 'com.squareup.sqlbrite3:sqlbrite:3.2.0'
     implementation 'com.jakewharton.rxbinding2:rxbinding-appcompat-v7:2.2.0'