prep to publish (#45)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5a733a0..50de15e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,4 @@
-## 3.8.3-dev
+## 3.8.3
 
 - Require the latest shelf and remove dead code.
 
diff --git a/pubspec.yaml b/pubspec.yaml
index 2197e60..0c67e5c 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,5 +1,5 @@
 name: sse
-version: 3.8.3-dev
+version: 3.8.3
 homepage: https://github.com/dart-lang/sse
 description: >-
   Provides client and server functionality for setting up bi-directional
@@ -20,8 +20,4 @@
 dev_dependencies:
   shelf_static: '>=0.2.8 <2.0.0'
   test: ^1.5.3
-  webdriver: ^2.1.0
-
-dependency_overrides:
-  shelf:
-    git: https://github.com/dart-lang/shelf.git
+  webdriver: ^3.0.0