diff --git a/CHANGES.rst b/CHANGES.rst
index b8625d3..1f8c1a6 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -2,7 +2,7 @@
  Changes
 =========
 
-3.1.1 (unreleased)
+3.1.1 (2024-09-20)
 ==================
 
 - Fix crashes on 32-bit PPC Linux. Note that there is no CI for this,
diff --git a/src/greenlet/__init__.py b/src/greenlet/__init__.py
index 22dbed4..b2dcc9b 100644
--- a/src/greenlet/__init__.py
+++ b/src/greenlet/__init__.py
@@ -25,7 +25,7 @@
 ###
 # Metadata
 ###
-__version__ = '3.1.1.dev0'
+__version__ = '3.1.1'
 from ._greenlet import _C_API # pylint:disable=no-name-in-module
 
 ###