diff --git a/.github/workflows/cd.yml b/.github/workflows/cd.yml
index 6c6100c..074f49b 100644
--- a/.github/workflows/cd.yml
+++ b/.github/workflows/cd.yml
@@ -55,6 +55,6 @@ jobs:
         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
       with:
         tag_name: ${{ github.ref }}
-        release_name: ${{ github.ref }}
+        release_name: Version ${{ github.ref }}
         draft: false
         prerelease: ${{ contains(steps.version.outputs.TAG_VERSION, '-rc') }}
diff --git a/CHANGELOG b/CHANGELOG
index 0b20ec9..91a8554 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,17 @@
+Version 0.4.0 (2021-03-02)
+--------------------------
+Required parameters after optional parameters deprecated in PHP 8.0 (closes #97)
+Lock Mountebank to v2.4.0 (#67)
+Remove deprecated errcontext from custom error handler (#95)
+Switch to version 4 UUIDs (#94)
+Remove rmccue/requests library as it is only used for Synchronous emitter (#42)
+Make clearer to users that the optional timestamp argument should be provided in milliseconds (#71)
+Add support for dvce_sent_tstamp (#56)
+Remove use of chdir() in FileEmitter (#81)
+Make optional timestamp argument set 'true timestamp' rather than 'device created timestamp' (#59)
+Review schema versions in Constants.php (#83)
+Add Snyk Integration (#93)
+
 Version 0.3.1 (2021-02-18)
 --------------------------
 Update copyright notices to 2021 (#92)
diff --git a/composer.json b/composer.json
index e933c6a..1944b23 100644
--- a/composer.json
+++ b/composer.json
@@ -28,7 +28,7 @@
     },
     "authors": [
         {
-            "name": "Joshua Beemster"
+            "name": "Snowplow Analytics Ltd"
         }
     ]
 }
diff --git a/src/Constants.php b/src/Constants.php
index c4134ba..93121e8 100644
--- a/src/Constants.php
+++ b/src/Constants.php
@@ -46,7 +46,7 @@ class Constants {
      * - SSL: the default for whether or not to use SSL Encryption
      * - Type: the default for what type of request the emitter will be making (POST or GET)
      */
-    const TRACKER_VERSION       = "php-0.3.1";
+    const TRACKER_VERSION       = "php-0.4.0";
     const DEFAULT_BASE_64       = true;
     const DEBUG_LOG_FILES       = true;
     const CONTEXT_SCHEMA        = "iglu:com.snowplowanalytics.snowplow/contexts/jsonschema/1-0-1";
diff --git a/tests/tests/ClassInitTests/TrackerTest.php b/tests/tests/ClassInitTests/TrackerTest.php
index 2db25e7..626f903 100644
--- a/tests/tests/ClassInitTests/TrackerTest.php
+++ b/tests/tests/ClassInitTests/TrackerTest.php
@@ -67,7 +67,7 @@ public function testTrackerInit() {
         // Asserts
         $this->assertEquals($this->s1, $tracker->returnSubject());
         $this->assertEquals(false, $tracker->returnEncodeBase64());
-        $this->assertEquals(array("tv" => "php-0.3.1", "tna" => "namespace", "aid" => "app_id"), $tracker->returnStdNvPairs());
+        $this->assertEquals(array("tv" => "php-0.4.0", "tna" => "namespace", "aid" => "app_id"), $tracker->returnStdNvPairs());
         $tracker->turnOffDebug(true);
     }