diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9678bf084..06bc7ddfe 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,70 @@
 # Changelog
 
+## [2.4.0](https://github.com/aws/aws-encryption-sdk-java/compare/v2.3.3...v2.4.0) (2022-03-09)
+
+
+### Features
+
+* AWS SDK v2 support ([006cdc4](https://github.com/aws/aws-encryption-sdk-java/commit/006cdc4b6395536c8c1b317d85c252f4892d6172))
+
+
+### Fixes
+
+* Revert "AWS Encryption SDK 2.4.0 Release -- $(date +%Y-%m-%d)" ([7563a95](https://github.com/aws/aws-encryption-sdk-java/commit/7563a9536fdd0a637777df7659f15bfbb56f31cb))
+
+
+### Maintenance
+
+* Add back removed CiphertextHeaders.deserialize method ([#382](https://github.com/aws/aws-encryption-sdk-java/issues/382)) ([c1f3e63](https://github.com/aws/aws-encryption-sdk-java/commit/c1f3e637421c7d5d71a092fd4812aa435639c3da))
+* add build to support uploading artifacts ([#379](https://github.com/aws/aws-encryption-sdk-java/issues/379)) ([69e7914](https://github.com/aws/aws-encryption-sdk-java/commit/69e7914d30e8c0ecea11aed7a924f77210677991))
+* Add CODEOWNERS file ([#406](https://github.com/aws/aws-encryption-sdk-java/issues/406)) ([b9adf9f](https://github.com/aws/aws-encryption-sdk-java/commit/b9adf9fdb3177d80bd7c2ec5ddad86230f2b13f4))
+* add javadoc update to batch build ([#376](https://github.com/aws/aws-encryption-sdk-java/issues/376)) ([d88190b](https://github.com/aws/aws-encryption-sdk-java/commit/d88190b810452c29c9e48892806bc7063a75800a))
+* Adding semantic release config file ([#346](https://github.com/aws/aws-encryption-sdk-java/issues/346)) ([6201c1a](https://github.com/aws/aws-encryption-sdk-java/commit/6201c1accccd3dea2d991a1d579234842865540d))
+* **ci:** change release vars ([#578](https://github.com/aws/aws-encryption-sdk-java/issues/578)) ([de99b56](https://github.com/aws/aws-encryption-sdk-java/commit/de99b563d1cd63551e284a0b9c71dad8dec53444))
+* **deps-dev:** bump junit-jupiter-api from 5.7.2 to 5.8.0 ([#339](https://github.com/aws/aws-encryption-sdk-java/issues/339)) ([6dfaef9](https://github.com/aws/aws-encryption-sdk-java/commit/6dfaef907b5ec5a3ed0c8bb4e774792f683ef03d))
+* **deps-dev:** bump junit-jupiter-api from 5.8.0 to 5.8.1 ([#347](https://github.com/aws/aws-encryption-sdk-java/issues/347)) ([7d3bb0a](https://github.com/aws/aws-encryption-sdk-java/commit/7d3bb0a976746bfb56c13136e876234ea64da581))
+* **deps-dev:** bump junit-jupiter-api from 5.8.1 to 5.8.2 ([#427](https://github.com/aws/aws-encryption-sdk-java/issues/427)) ([7de569a](https://github.com/aws/aws-encryption-sdk-java/commit/7de569aa3766e2339a2c7bbf0bb3c474f75f99cd))
+* **deps-dev:** bump junit-vintage-engine from 5.7.2 to 5.8.0 ([#337](https://github.com/aws/aws-encryption-sdk-java/issues/337)) ([2338b92](https://github.com/aws/aws-encryption-sdk-java/commit/2338b92358b655ee057ba15b4a6b4282988f8875))
+* **deps-dev:** bump junit-vintage-engine from 5.8.0 to 5.8.1 ([#348](https://github.com/aws/aws-encryption-sdk-java/issues/348)) ([d0221cf](https://github.com/aws/aws-encryption-sdk-java/commit/d0221cf8367d7cf2e03ef94dc55f09e48ef9fa07))
+* **deps-dev:** bump junit-vintage-engine from 5.8.1 to 5.8.2 ([#426](https://github.com/aws/aws-encryption-sdk-java/issues/426)) ([065ab94](https://github.com/aws/aws-encryption-sdk-java/commit/065ab94d7ca57d33fac8217cdcba4f046d7e910c))
+* **deps-dev:** bump mockito-core from 3.12.3 to 3.12.4 ([#323](https://github.com/aws/aws-encryption-sdk-java/issues/323)) ([0208d0d](https://github.com/aws/aws-encryption-sdk-java/commit/0208d0d1a2309a26277f3793dc3e7ba6c13c1141))
+* **deps-dev:** bump mockito-core from 4.0.0 to 4.1.0 ([#441](https://github.com/aws/aws-encryption-sdk-java/issues/441)) ([8dfda1a](https://github.com/aws/aws-encryption-sdk-java/commit/8dfda1ac4d28d82e069a91891743a524965a16e8))
+* **deps-dev:** bump mockito-core from 4.1.0 to 4.2.0 ([#458](https://github.com/aws/aws-encryption-sdk-java/issues/458)) ([a1b1885](https://github.com/aws/aws-encryption-sdk-java/commit/a1b18851328a310deff388b11f0fbf691a4cfd2b))
+* **deps-dev:** bump mockito-core from 4.2.0 to 4.3.1 ([#500](https://github.com/aws/aws-encryption-sdk-java/issues/500)) ([a709e69](https://github.com/aws/aws-encryption-sdk-java/commit/a709e69c3beca2824bc5f6c6529b30417df4bbaf))
+* **deps:** bump aws-java-sdk from 1.12.102 to 1.12.105 ([#404](https://github.com/aws/aws-encryption-sdk-java/issues/404)) ([b87d8c6](https://github.com/aws/aws-encryption-sdk-java/commit/b87d8c6716ba98e1b4e1bb08c841f849aa31ebc2))
+* **deps:** bump aws-java-sdk from 1.12.105 to 1.12.106 ([#405](https://github.com/aws/aws-encryption-sdk-java/issues/405)) ([dd633c0](https://github.com/aws/aws-encryption-sdk-java/commit/dd633c037caa0c7ca373cd59f554d49b5cb80448))
+* **deps:** bump aws-java-sdk from 1.12.106 to 1.12.127 ([#436](https://github.com/aws/aws-encryption-sdk-java/issues/436)) ([91f6ffc](https://github.com/aws/aws-encryption-sdk-java/commit/91f6ffca2ce0499d08b6ce3259459fbb7cce890d))
+* **deps:** bump aws-java-sdk from 1.12.127 to 1.12.128 ([#437](https://github.com/aws/aws-encryption-sdk-java/issues/437)) ([37078ec](https://github.com/aws/aws-encryption-sdk-java/commit/37078ec29805ae23ce7c21e440890d68a9b0956c))
+* **deps:** bump aws-java-sdk from 1.12.128 to 1.12.129 ([#447](https://github.com/aws/aws-encryption-sdk-java/issues/447)) ([6872c63](https://github.com/aws/aws-encryption-sdk-java/commit/6872c637b199b3df16104ce3b3b644b90f308c1c))
+* **deps:** bump aws-java-sdk from 1.12.129 to 1.12.131 ([#463](https://github.com/aws/aws-encryption-sdk-java/issues/463)) ([a98a321](https://github.com/aws/aws-encryption-sdk-java/commit/a98a321c046ef1af0343ee3c4753c5e1c361bb62))
+* **deps:** bump aws-java-sdk from 1.12.131 to 1.12.150 ([#508](https://github.com/aws/aws-encryption-sdk-java/issues/508)) ([433dc1b](https://github.com/aws/aws-encryption-sdk-java/commit/433dc1b809a62f7e3bc011b62a55ec4a5e7e90ae))
+* **deps:** bump aws-java-sdk from 1.12.150 to 1.12.151 ([#510](https://github.com/aws/aws-encryption-sdk-java/issues/510)) ([70257a5](https://github.com/aws/aws-encryption-sdk-java/commit/70257a5e0d7244682ce8a72c72ea20101113dd48))
+* **deps:** bump aws-java-sdk from 1.12.151 to 1.12.162 ([#541](https://github.com/aws/aws-encryption-sdk-java/issues/541)) ([22abc6c](https://github.com/aws/aws-encryption-sdk-java/commit/22abc6c14714ecd164fbb08936d996fd34610b05))
+* **deps:** bump aws-java-sdk from 1.12.54 to 1.12.68 ([#341](https://github.com/aws/aws-encryption-sdk-java/issues/341)) ([291be0a](https://github.com/aws/aws-encryption-sdk-java/commit/291be0a722567697cb2fe5174837c83276d626bd))
+* **deps:** bump aws-java-sdk from 1.12.68 to 1.12.73 ([#350](https://github.com/aws/aws-encryption-sdk-java/issues/350)) ([153a0b3](https://github.com/aws/aws-encryption-sdk-java/commit/153a0b3ec3e99c3d878ac9f97176138277a35d8b))
+* **deps:** bump aws-java-sdk from 1.12.73 to 1.12.74 ([#351](https://github.com/aws/aws-encryption-sdk-java/issues/351)) ([e5f3962](https://github.com/aws/aws-encryption-sdk-java/commit/e5f3962f74da9b4197e37d98e68e722ee0d10e8f))
+* **deps:** bump aws-java-sdk from 1.12.74 to 1.12.75 ([#353](https://github.com/aws/aws-encryption-sdk-java/issues/353)) ([3339c20](https://github.com/aws/aws-encryption-sdk-java/commit/3339c20b05e9cbb65317785cf72c3d46087c82c6))
+* **deps:** bump aws-java-sdk from 1.12.75 to 1.12.102 ([#400](https://github.com/aws/aws-encryption-sdk-java/issues/400)) ([98b079c](https://github.com/aws/aws-encryption-sdk-java/commit/98b079cb61417f3ee36035d74772f8913ef09518))
+* **deps:** bump bcprov-ext-jdk15on from 1.69 to 1.70 ([#439](https://github.com/aws/aws-encryption-sdk-java/issues/439)) ([969852a](https://github.com/aws/aws-encryption-sdk-java/commit/969852a4bd934f1a50d05b256e6aae82ed8832fe))
+* **deps:** bump build-helper-maven-plugin from 3.2.0 to 3.3.0 ([#473](https://github.com/aws/aws-encryption-sdk-java/issues/473)) ([4f7d08c](https://github.com/aws/aws-encryption-sdk-java/commit/4f7d08ca31c09dc6ddbd22bd1d4d4c8629614ea0))
+* **deps:** bump fmt-maven-plugin from 2.12 to 2.13 ([#429](https://github.com/aws/aws-encryption-sdk-java/issues/429)) ([e5d8c32](https://github.com/aws/aws-encryption-sdk-java/commit/e5d8c3227ae027105e0195e006dd5a9a2f2fa0d6))
+* **deps:** bump maven-compiler-plugin from 3.8.1 to 3.9.0 ([#481](https://github.com/aws/aws-encryption-sdk-java/issues/481)) ([369a049](https://github.com/aws/aws-encryption-sdk-java/commit/369a0498127377ae3b4cdfa3649c612f18a4582a))
+* **deps:** bump maven-javadoc-plugin from 3.3.0 to 3.3.1 ([#333](https://github.com/aws/aws-encryption-sdk-java/issues/333)) ([693e43f](https://github.com/aws/aws-encryption-sdk-java/commit/693e43fb9606824e8b4f5336ef8d06cf454338de))
+* **deps:** bump nexus-staging-maven-plugin from 1.6.11 to 1.6.12 ([#546](https://github.com/aws/aws-encryption-sdk-java/issues/546)) ([6fa782b](https://github.com/aws/aws-encryption-sdk-java/commit/6fa782bb830273bf09cf80e0f14fc3be774ea276))
+* **deps:** bump nexus-staging-maven-plugin from 1.6.8 to 1.6.11 ([#535](https://github.com/aws/aws-encryption-sdk-java/issues/535)) ([0ab1db0](https://github.com/aws/aws-encryption-sdk-java/commit/0ab1db09d10c9477167dd0545747e1391090727b))
+* **docs:** update README get started example ([#423](https://github.com/aws/aws-encryption-sdk-java/issues/423)) ([da0fe89](https://github.com/aws/aws-encryption-sdk-java/commit/da0fe89836c40e33f201b792052f02abe44af92b))
+* **docs:** updating broken javadoc link ([#366](https://github.com/aws/aws-encryption-sdk-java/issues/366)) ([487be4b](https://github.com/aws/aws-encryption-sdk-java/commit/487be4b8765e92b4b5b8d840133955573e8710da))
+* moving and renaming buildspec.yml ([#360](https://github.com/aws/aws-encryption-sdk-java/issues/360)) ([e259caf](https://github.com/aws/aws-encryption-sdk-java/commit/e259caf3c50ab4c3346ca8e203cc6d6878482aa7))
+* release updates ([#369](https://github.com/aws/aws-encryption-sdk-java/issues/369)) ([4b9d932](https://github.com/aws/aws-encryption-sdk-java/commit/4b9d932a6d8f5085db34b0f8a693f9cfc0d04b49))
+* source controlling cfn templates that will be used for our release process ([#345](https://github.com/aws/aws-encryption-sdk-java/issues/345)) ([456dda0](https://github.com/aws/aws-encryption-sdk-java/commit/456dda0a8d6a2b3ce67024cc0b52edd24ec2816b))
+* update dependabot to update mainline-1.x ([#440](https://github.com/aws/aws-encryption-sdk-java/issues/440)) ([960f3e5](https://github.com/aws/aws-encryption-sdk-java/commit/960f3e5459d196b1d623d61d9d780fa519b106ad))
+* update gh token ([#412](https://github.com/aws/aws-encryption-sdk-java/issues/412)) ([f8ada9b](https://github.com/aws/aws-encryption-sdk-java/commit/f8ada9bcd3c804abcf1747ffb1cefbdff8c1e576))
+* update release process ([#396](https://github.com/aws/aws-encryption-sdk-java/issues/396)) ([c0ff093](https://github.com/aws/aws-encryption-sdk-java/commit/c0ff093c633cabc21d537ff8e27d6a41d08a772c))
+* update releaserc to include pom.xml file ([#357](https://github.com/aws/aws-encryption-sdk-java/issues/357)) ([63e2f05](https://github.com/aws/aws-encryption-sdk-java/commit/63e2f054929b056bdd74328b94c5f96577626113))
+* update token name and timeout ([#411](https://github.com/aws/aws-encryption-sdk-java/issues/411)) ([c0d5a0e](https://github.com/aws/aws-encryption-sdk-java/commit/c0d5a0e8c8564ece51f4c43c99ae7bfcc4ab71d5))
+* updating prod template to remove resources and abstract ones ([#354](https://github.com/aws/aws-encryption-sdk-java/issues/354)) ([ecc17a6](https://github.com/aws/aws-encryption-sdk-java/commit/ecc17a6789a204fdc9bded0fa335b7087f0b371b))
+* Upgrade mockito to 4.0.0 ([#438](https://github.com/aws/aws-encryption-sdk-java/issues/438)) ([629dbfd](https://github.com/aws/aws-encryption-sdk-java/commit/629dbfdaa91b6023034f808f5e4865fd7048c963))
+
 ### 2.3.3 -- 2021-08-26
 
 ### Maintenance
diff --git a/README.md b/README.md
index bed34b071..587099702 100644
--- a/README.md
+++ b/README.md
@@ -56,7 +56,7 @@ You can get the latest release from Maven:
 <dependency>
   <groupId>com.amazonaws</groupId>
   <artifactId>aws-encryption-sdk-java</artifactId>
-  <version>2.3.3</version>
+  <version>2.4.0</version>
 </dependency>
 ```
 
diff --git a/pom.xml b/pom.xml
index 9be1f51b6..d36709c88 100644
--- a/pom.xml
+++ b/pom.xml
@@ -4,7 +4,7 @@
 
     <groupId>com.amazonaws</groupId>
     <artifactId>aws-encryption-sdk-java</artifactId>
-    <version>2.3.3</version>
+    <version>2.4.0</version>
     <packaging>jar</packaging>
 
     <name>aws-encryption-sdk-java</name>