diff --git a/CHANGES.md b/CHANGES.md
index 3e09d07..f110e83 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -20,6 +20,7 @@
 * Update Six compatibility library 1.10.0 (r433) to 1.11.0 (68112f3)
 * Update Tornado Web Server 4.5.1 (79b2683) to 5.0.1 (35a538f)
 * Update unidecode library 0.04.21 (e99b0e3) to 1.0.22 (81f938d)
+* Update webencodings 0.5 (3970651) to 0.5.1 (fa2cb5d)
 
 [develop changelog]
 
diff --git a/lib/webencodings/__init__.py b/lib/webencodings/__init__.py
index 03d5d35..d21d697 100644
--- a/lib/webencodings/__init__.py
+++ b/lib/webencodings/__init__.py
@@ -1,4 +1,4 @@
-# coding: utf8
+# coding: utf-8
 """
 
     webencodings
@@ -19,7 +19,7 @@ import codecs
 from .labels import LABELS
 
 
-VERSION = '0.5'
+VERSION = '0.5.1'
 
 
 # Some names in Encoding are not valid Python aliases. Remap these.
diff --git a/lib/webencodings/tests.py b/lib/webencodings/tests.py
index b8c5653..e12c10d 100644
--- a/lib/webencodings/tests.py
+++ b/lib/webencodings/tests.py
@@ -1,4 +1,4 @@
-# coding: utf8
+# coding: utf-8
 """
 
     webencodings.tests
diff --git a/lib/webencodings/x_user_defined.py b/lib/webencodings/x_user_defined.py
index f0daa11..d16e326 100644
--- a/lib/webencodings/x_user_defined.py
+++ b/lib/webencodings/x_user_defined.py
@@ -1,4 +1,4 @@
-# coding: utf8
+# coding: utf-8
 """
 
     webencodings.x_user_defined