diff --git a/CHANGELOG.md b/CHANGELOG.md
index 964cd17..6f27397 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,10 @@
 ## Changelog
 
+### 1.9.1 (Aug 03, 2022 UTC)
+* Fixed a bug where the packet loss rate was negative.
+* Changed the `startedAt` property of DirectCall to public
+* Improved stability
+
 ### 1.9.0 (Dec 9, 2021 UTC)
 For 1.9.0, a feature to delete a room in Group call is released.
 * Added `onDeleted()` in `RoomListener` which is invoked when the room has been deleted by the Platform API.
diff --git a/README.md b/README.md
index bb23010..2d2f286 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@
 
 [![Platform](https://img.shields.io/badge/platform-android-orange.svg)](https://github.com/sendbird/sendbird-calls-android)
 [![Languages](https://img.shields.io/badge/language-java-orange.svg)](https://github.com/sendbird/sendbird-calls-android)
-[![Maven](https://img.shields.io/badge/maven-v1.9.0-green.svg)](https://github.com/sendbird/sendbird-calls-android/tree/master/com/sendbird/sdk/sendbird-calls/1.9.0)
+[![Maven](https://img.shields.io/badge/maven-v1.9.1-green.svg)](https://github.com/sendbird/sendbird-calls-android/tree/master/com/sendbird/sdk/sendbird-calls/1.9.1)
 [![Commercial License](https://img.shields.io/badge/license-Commercial-brightgreen.svg)](https://github.com/sendbird/sendbird-calls-android/blob/master/LICENSE.md)
 
 ## Table of contents
@@ -80,7 +80,7 @@ allprojects {
 
 ```groovy
 dependencies {
-    implementation 'com.sendbird.sdk:sendbird-calls:1.9.0'
+    implementation 'com.sendbird.sdk:sendbird-calls:1.9.1'
 }
 ```
 
diff --git a/com/sendbird/sdk/sendbird-calls/1.9.1/sendbird-calls-1.9.1.aar b/com/sendbird/sdk/sendbird-calls/1.9.1/sendbird-calls-1.9.1.aar
new file mode 100644
index 0000000..2a80d11
Binary files /dev/null and b/com/sendbird/sdk/sendbird-calls/1.9.1/sendbird-calls-1.9.1.aar differ
diff --git a/com/sendbird/sdk/sendbird-calls/1.9.1/sendbird-calls-1.9.1.aar.md5 b/com/sendbird/sdk/sendbird-calls/1.9.1/sendbird-calls-1.9.1.aar.md5
new file mode 100644
index 0000000..87a654b
--- /dev/null
+++ b/com/sendbird/sdk/sendbird-calls/1.9.1/sendbird-calls-1.9.1.aar.md5
@@ -0,0 +1 @@
+e730b3b45f71bda15164a80aea389c9a
\ No newline at end of file
diff --git a/com/sendbird/sdk/sendbird-calls/1.9.1/sendbird-calls-1.9.1.aar.sha1 b/com/sendbird/sdk/sendbird-calls/1.9.1/sendbird-calls-1.9.1.aar.sha1
new file mode 100644
index 0000000..8f647ba
--- /dev/null
+++ b/com/sendbird/sdk/sendbird-calls/1.9.1/sendbird-calls-1.9.1.aar.sha1
@@ -0,0 +1 @@
+cf98d038231946146a7e8ad76cf3600d36a1230d
\ No newline at end of file
diff --git a/com/sendbird/sdk/sendbird-calls/1.9.1/sendbird-calls-1.9.1.pom b/com/sendbird/sdk/sendbird-calls/1.9.1/sendbird-calls-1.9.1.pom
new file mode 100644
index 0000000..8a3d7a2
--- /dev/null
+++ b/com/sendbird/sdk/sendbird-calls/1.9.1/sendbird-calls-1.9.1.pom
@@ -0,0 +1,46 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns="http://maven.apache.org/POM/4.0.0"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
+  <modelVersion>4.0.0</modelVersion>
+  <groupId>com.sendbird.sdk</groupId>
+  <artifactId>sendbird-calls</artifactId>
+  <version>1.9.1</version>
+  <packaging>aar</packaging>
+  <name>SendBird Calls Android SDK</name>
+  <description>SendBird is simplest solution for chat and messaging. It enables your app to engage and retain your users in real-time.</description>
+  <url>https://www.sendbird.com/</url>
+  <inceptionYear>2019</inceptionYear>
+  <licenses>
+    <license>
+      <name>SendBird Calls SDK License</name>
+      <url>https://github.com/sendbird/sendbird-calls-android/blob/master/LICENSE.md</url>
+    </license>
+  </licenses>
+  <dependencies>
+    <dependency>
+      <groupId>com.sendbird.sdk</groupId>
+      <artifactId>sendbird-webrtc</artifactId>
+      <version>1.0.4390</version>
+      <type>aar</type>
+      <scope>compile</scope>
+      <exclusions>
+        <exclusion>
+          <artifactId>*</artifactId>
+          <groupId>*</groupId>
+        </exclusion>
+      </exclusions>
+    </dependency>
+    <dependency>
+      <groupId>org.jetbrains.kotlin</groupId>
+      <artifactId>kotlin-stdlib</artifactId>
+      <version>1.5.31</version>
+      <scope>compile</scope>
+    </dependency>
+    <dependency>
+      <groupId>com.getkeepsafe.relinker</groupId>
+      <artifactId>relinker</artifactId>
+      <version>1.4.3</version>
+      <scope>compile</scope>
+    </dependency>
+  </dependencies>
+</project>
diff --git a/com/sendbird/sdk/sendbird-calls/1.9.1/sendbird-calls-1.9.1.pom.md5 b/com/sendbird/sdk/sendbird-calls/1.9.1/sendbird-calls-1.9.1.pom.md5
new file mode 100644
index 0000000..cf14112
--- /dev/null
+++ b/com/sendbird/sdk/sendbird-calls/1.9.1/sendbird-calls-1.9.1.pom.md5
@@ -0,0 +1 @@
+d80693dea172835b74120acef139aef4
\ No newline at end of file
diff --git a/com/sendbird/sdk/sendbird-calls/1.9.1/sendbird-calls-1.9.1.pom.sha1 b/com/sendbird/sdk/sendbird-calls/1.9.1/sendbird-calls-1.9.1.pom.sha1
new file mode 100644
index 0000000..6657381
--- /dev/null
+++ b/com/sendbird/sdk/sendbird-calls/1.9.1/sendbird-calls-1.9.1.pom.sha1
@@ -0,0 +1 @@
+1cb12f8fa9a200962cc0defb63fd15413d469403
\ No newline at end of file
diff --git a/com/sendbird/sdk/sendbird-calls/maven-metadata.xml b/com/sendbird/sdk/sendbird-calls/maven-metadata.xml
index 217de57..466f223 100644
--- a/com/sendbird/sdk/sendbird-calls/maven-metadata.xml
+++ b/com/sendbird/sdk/sendbird-calls/maven-metadata.xml
@@ -3,7 +3,7 @@
   <groupId>com.sendbird.sdk</groupId>
   <artifactId>sendbird-calls</artifactId>
   <versioning>
-    <release>1.9.0</release>
+    <release>1.9.1</release>
     <versions>
       <version>0.6.0</version>
       <version>0.6.1</version>
@@ -37,7 +37,8 @@
       <version>1.7.0</version>
       <version>1.8.0</version>
       <version>1.9.0</version>
+      <version>1.9.1</version>
     </versions>
-    <lastUpdated>20211209060127</lastUpdated>
+    <lastUpdated>20220803074819</lastUpdated>
   </versioning>
 </metadata>
diff --git a/com/sendbird/sdk/sendbird-calls/maven-metadata.xml.md5 b/com/sendbird/sdk/sendbird-calls/maven-metadata.xml.md5
index ef4c4af..52df518 100644
--- a/com/sendbird/sdk/sendbird-calls/maven-metadata.xml.md5
+++ b/com/sendbird/sdk/sendbird-calls/maven-metadata.xml.md5
@@ -1 +1 @@
-a70c068a60e916ad8a8026507ea4cc5b
\ No newline at end of file
+a7dcbc21ae03cbd6465eb186f8323c87
\ No newline at end of file
diff --git a/com/sendbird/sdk/sendbird-calls/maven-metadata.xml.sha1 b/com/sendbird/sdk/sendbird-calls/maven-metadata.xml.sha1
index a09550c..4e0c294 100644
--- a/com/sendbird/sdk/sendbird-calls/maven-metadata.xml.sha1
+++ b/com/sendbird/sdk/sendbird-calls/maven-metadata.xml.sha1
@@ -1 +1 @@
-7e4fbb111ef85ebd96f7c0399611b1d63fa46c34
\ No newline at end of file
+363beb93d859d83ec02a5735cf58f14a24d11642
\ No newline at end of file