diff --git a/attachment-viewer/build.gradle b/attachment-viewer/build.gradle
index a92eb11212..1c9e88cc5b 100644
--- a/attachment-viewer/build.gradle
+++ b/attachment-viewer/build.gradle
@@ -63,7 +63,7 @@ android {
 dependencies {
     implementation 'com.github.chrisbanes:PhotoView:2.1.4'
 
-    implementation 'io.reactivex.rxjava2:rxkotlin:2.3.0'
+    implementation 'io.reactivex.rxjava2:rxkotlin:2.4.0'
     implementation 'io.reactivex.rxjava2:rxandroid:2.1.1'
 
     implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
diff --git a/matrix-sdk-android-rx/build.gradle b/matrix-sdk-android-rx/build.gradle
index 0e899e21ff..37b0ff8d00 100644
--- a/matrix-sdk-android-rx/build.gradle
+++ b/matrix-sdk-android-rx/build.gradle
@@ -36,7 +36,7 @@ android {
 dependencies {
     implementation project(":matrix-sdk-android")
     implementation 'androidx.appcompat:appcompat:1.2.0'
-    implementation 'io.reactivex.rxjava2:rxkotlin:2.3.0'
+    implementation 'io.reactivex.rxjava2:rxkotlin:2.4.0'
     implementation 'io.reactivex.rxjava2:rxandroid:2.1.1'
     implementation "org.jetbrains.kotlinx:kotlinx-coroutines-rx2:$kotlin_coroutines_version"
 
diff --git a/vector/build.gradle b/vector/build.gradle
index 92f3e151dc..e57ee57d35 100644
--- a/vector/build.gradle
+++ b/vector/build.gradle
@@ -341,7 +341,7 @@ dependencies {
     implementation 'com.googlecode.libphonenumber:libphonenumber:8.12.18'
 
     // rx
-    implementation 'io.reactivex.rxjava2:rxkotlin:2.3.0'
+    implementation 'io.reactivex.rxjava2:rxkotlin:2.4.0'
     implementation 'io.reactivex.rxjava2:rxandroid:2.1.1'
     implementation 'com.jakewharton.rxrelay2:rxrelay:2.1.1'
     // RXBinding