diff --git a/CHANGES.md b/CHANGES.md
index 88f953d35..b31864db1 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,13 +1,16 @@
-# 4.0.0 (2020-?-?)
+# 4.0.0 (2020-3-29)
 
 *asyncio aiohttp refactor*
 
-- Replace requests with aiohttp
+- Replace requests with aiohttp - `PR #440`
   - Replace xmlrpc2 with aiohttp-xmlrpc - `PR #404`
-- Add PyPI metadata and Python version plugin filters - `PR #391`
-- Autobuild Docker images with master
-- Only Print conf deprecations if found in config - `PR #327`
-
+- Only store PEP503 Normalized Simple API directories - `PR #465 + #455`
+- Flag errors when KeyboardInterrupt raised during sync - `PR #421`
+- Finish Windows Support + Add CI - `PRs #469 + #471` - Thanks **@FaustinCarter**
+- Autobuild Docker images with master - `PR #88` - Thanks **@abitrolly**
+- Only print conf deprecations if found in config - `PR #327`
+- Add PyPI metadata and Python version plugin filters - `PR #391` - Thanks **@TemptorSent**
+- Add in *GitHub Actions CI* for Linux (Ubuntu), MacOSX + Windows
 
 # 3.6.0 (2019-09-24)
 
diff --git a/README.md b/README.md
index 6de8a7d19..777119635 100644
--- a/README.md
+++ b/README.md
@@ -8,9 +8,10 @@
 
 ----
 
-This is a PyPI mirror client according to `PEP 381`
+This is a PyPI mirror client according to `PEP 381` + `PEP 503`
 http://www.python.org/dev/peps/pep-0381/.
 
+- bandersnatch >=4.0 supports *Linux*, *MacOSX* + *Windows*
 - [Documentation](https://bandersnatch.readthedocs.io/en/latest/)
 
 **bandersnatch maintainers** are looking for more **help**! Please refer to our
diff --git a/setup.cfg b/setup.cfg
index e54839d16..0a6dec23e 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -16,7 +16,7 @@ project_urls =
     Source Code = https://github.com/pypa/bandersnatch
     Change Log = https://github.com/pypa/bandersnatch/CHANGES.md
 url = https://github.com/pypa/bandersnatch/
-version = 4.0.0.dev2
+version = 4.0.0
 
 [options]
 include_package_data = True
diff --git a/src/bandersnatch/__init__.py b/src/bandersnatch/__init__.py
index 281daf03e..bf7a8ae8f 100644
--- a/src/bandersnatch/__init__.py
+++ b/src/bandersnatch/__init__.py
@@ -19,7 +19,7 @@ def version_str(self) -> str:
     major=4,
     minor=0,
     micro=0,
-    releaselevel="dev2",
+    releaselevel="",
     serial=0,  # Not currently in use with Bandersnatch versioning
 )
 __version__ = __version_info__.version_str