diff --git a/docs/changelog.rst b/docs/changelog.rst
index cdbb430e..3281b7b7 100644
--- a/docs/changelog.rst
+++ b/docs/changelog.rst
@@ -5,9 +5,14 @@ Changelog
 
 Development
 ===========
-- Add Python 3.7 in travis #2058
 - (Fill this out as you fix issues and develop your features).
 
+Changes in 0.18.1
+=================
+- Fix a bug introduced in 0.18.0 which was causing `.save()` to update all the fields
+    instead of updating only the modified fields. This gug only occurs when using custom pk #2082
+- Add Python 3.7 in travis #2058
+
 Changes in 0.18.0
 =================
 - Drop support for EOL'd MongoDB v2.6, v3.0, and v3.2.
diff --git a/mongoengine/__init__.py b/mongoengine/__init__.py
index 4ddc2bf9..d6a50766 100644
--- a/mongoengine/__init__.py
+++ b/mongoengine/__init__.py
@@ -23,7 +23,7 @@ __all__ = (list(document.__all__) + list(fields.__all__) +
            list(signals.__all__) + list(errors.__all__))
 
 
-VERSION = (0, 18, 0)
+VERSION = (0, 18, 1)
 
 
 def get_version():