diff --git a/CHANGES.txt b/CHANGES.txt
index ed33e05a..98f6fefd 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -2,7 +2,7 @@
 CHANGELOG
 #########
 
-3.7.0 (unreleased)
+4.0.0 (2019-12-02)
 ==================
 
 **Breaking changes**
diff --git a/setup.py b/setup.py
index df00400d..9cce08bb 100755
--- a/setup.py
+++ b/setup.py
@@ -15,7 +15,7 @@
 package_data = {}
 
 setup(name='cornice',
-      version='3.7.0.dev0',
+      version='4.0.0',
       description='Define Web Services in Pyramid.',
       long_description=README + '\n\n' + CHANGES,
       license='MPLv2.0',