diff --git a/Number.php b/Number.php
index be0243d..df67017 100644
--- a/Number.php
+++ b/Number.php
@@ -15,7 +15,7 @@
 	return 1;
 }
 
-define( 'DATAVALUES_NUMBER_VERSION', '0.8.3 dev' );
+define( 'DATAVALUES_NUMBER_VERSION', '0.8.3' );
 
 if ( defined( 'MEDIAWIKI' ) ) {
 	$GLOBALS['wgExtensionCredits']['datavalues'][] = [
diff --git a/README.md b/README.md
index 54221a6..bc2f486 100644
--- a/README.md
+++ b/README.md
@@ -50,9 +50,11 @@ the [Wikidata project](https://www.wikidata.org/).
 
 ## Release notes
 
-### 0.8.3 (dev)
+### 0.8.3 (2017-06-26)
 
-* Updated minimal required PHP version to 5.5.9.
+* Fixed `UnboundedQuantityValue::newFromArray` not accepting mixed values.
+* Deprecated `DecimalValue::newFromArray` and `UnboundedQuantityValue::newFromArray`.
+* Updated minimal required PHP version from 5.3 to 5.5.9.
 
 ### 0.8.2 (2016-11-17)