diff --git a/CHANGES.MD b/CHANGES.MD
index b1284ca6..8a19636d 100644
--- a/CHANGES.MD
+++ b/CHANGES.MD
@@ -1,3 +1,10 @@
+3.21.0 (2025-07-28)
+=================
+- Bumped version for `gson` from `2.10` to `2.13.1`
+- Bumped version for `okhttp` from `4.12.0` to `5.1.0`
+- Bumped version for `okio` from `3.6.0` to `3.15.0`
+- Bumped version for `commons-codec` from `1.15.0` to `1.19.0`
+
 3.20.0 (2025-05-12)
 =================
 - Added support for `$promotions` complex field to `$update_account` event fields
diff --git a/README.md b/README.md
index 96218131..ffbe33b9 100644
--- a/README.md
+++ b/README.md
@@ -13,13 +13,13 @@ Java 1.7 or later.
 <dependency>
     <groupId>com.siftscience</groupId>
     <artifactId>sift-java</artifactId>
-    <version>3.20.0</version>
+    <version>3.21.0</version>
 </dependency>
 ```
 ### Gradle
 ```
 dependencies {
-    compile 'com.siftscience:sift-java:3.20.0'
+    compile 'com.siftscience:sift-java:3.21.0'
 }
 ```
 ### Other
diff --git a/build.gradle b/build.gradle
index d829f63b..b5808f9a 100644
--- a/build.gradle
+++ b/build.gradle
@@ -5,7 +5,7 @@ apply plugin: 'signing'
 apply plugin: 'java-library-distribution'
 
 group = 'com.siftscience'
-version = '3.20.0'
+version = '3.21.0'
 
 repositories {
     mavenCentral()
diff --git a/src/main/java/com/siftscience/Constants.java b/src/main/java/com/siftscience/Constants.java
index a2bcf51c..fc03fa43 100644
--- a/src/main/java/com/siftscience/Constants.java
+++ b/src/main/java/com/siftscience/Constants.java
@@ -3,6 +3,6 @@
 public class Constants {
 
     public static final String API_VERSION = "v205";
-    public static final String LIB_VERSION = "3.20.0";
+    public static final String LIB_VERSION = "3.21.0";
     public static final String USER_AGENT_HEADER = String.format("SiftScience/%s sift-java/%s", API_VERSION, LIB_VERSION);
 }
diff --git a/src/test/java/com/siftscience/SiftRequestTest.java b/src/test/java/com/siftscience/SiftRequestTest.java
index bf4fe073..376bb903 100644
--- a/src/test/java/com/siftscience/SiftRequestTest.java
+++ b/src/test/java/com/siftscience/SiftRequestTest.java
@@ -29,7 +29,7 @@ public void testUserAgentHeader() throws Exception {
 
         // then
         RecordedRequest recordedRequest = server.takeRequest();
-        assertEquals("SiftScience/v205 sift-java/3.20.0",
+        assertEquals("SiftScience/v205 sift-java/3.21.0",
             recordedRequest.getHeader("User-Agent"));
     }