diff --git a/CHANGES.rst b/CHANGES.rst
index 73cec73ef..ba500f150 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -1,4 +1,4 @@
-0.3.1 (unreleased)
+0.3.1 (2018-10-20)
 ------------------
 
 Minor bugfixes and improvements.
diff --git a/asv/__init__.py b/asv/__init__.py
index 5705878d9..6a481ff7c 100644
--- a/asv/__init__.py
+++ b/asv/__init__.py
@@ -9,7 +9,7 @@
 
 # This __version__ assignment is parsed by setup.py; keep it in this form.
 # Development versions end with ".dev" (suffix is added below).
-__version__ = '0.3.1.dev'
+__version__ = '0.3.1'
 __release__ = not __version__.endswith(".dev")
 
 try: