diff --git a/HISTORY.rst b/HISTORY.rst
index d46725f..41d68f9 100644
--- a/HISTORY.rst
+++ b/HISTORY.rst
@@ -3,7 +3,7 @@
 History
 -------
 
-3.1 (2021-xx-xx)
+3.1 (2021-01-04)
 ++++++++++++++++
 
 - Ensure license is included in package (Thanks, Julien Schueller)
diff --git a/idna/package_data.py b/idna/package_data.py
index 31e5a9c..1420ea2 100644
--- a/idna/package_data.py
+++ b/idna/package_data.py
@@ -1,2 +1,2 @@
-__version__ = '3.0'
+__version__ = '3.1'