diff --git a/CHANGES.rst b/CHANGES.rst
index 32565111..57fe7131 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -1,3 +1,8 @@
+v3.9.1
+======
+
+* #296: Exclude 'prepare' package.
+
 v3.9.0
 ======
 
diff --git a/setup.cfg b/setup.cfg
index 8974f885..6fc73125 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -29,6 +29,7 @@ exclude =
 	dist*
 	docs*
 	tests*
+	prepare*
 
 [options.extras_require]
 testing =