diff --git a/CHANGES.rst b/CHANGES.rst
index 885654573..0f3841d0b 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -1,17 +1,14 @@
 Release History
 ---------------
 
-Release 0.5.1 (in development)
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+Release 0.5.1 (2021-02-19)
+~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 New Features:
 
 * Paragraphs can now be numbered. rinohtype also allows for referencing them by
-  number, but docutils/Sphinx doesn't offer the means for this.
-
-Changed:
-
-*
+  number, but docutils/Sphinx doesn't readily offer the means express that. A
+  workaround for this will be included in a future release.
 
 Fixed:
 
@@ -22,6 +19,9 @@ Fixed:
 * Handling of base template specified as string in a template configuration
 * Table column widths entries now also accept fractions
 
+Part of the work included in this release was kindly sponsored by `Joby
+Aviation <https://www.jobyaviation.com>`_.
+
 
 Release 0.5.0 (2021-02-03)
 ~~~~~~~~~~~~~~~~~~~~~~~~~~
diff --git a/src/rinoh/__init__.py b/src/rinoh/__init__.py
index af9887911..e1439f7ca 100644
--- a/src/rinoh/__init__.py
+++ b/src/rinoh/__init__.py
@@ -35,7 +35,7 @@
 
 
 __version__ = importlib_metadata.version('rinohtype')
-__release_date__ = 'in development'
+__release_date__ = '2021-02-19'
 
 
 from . import resource