--- a/CHANGELOG.rst	2020-12-08 07:16:12.000000000 +0800
+++ b/CHANGELOG.rst	2020-12-18 17:33:00.372643789 +0800
@@ -31,7 +31,7 @@
 
 
 3.1.8 (11-Aug-2020)
-==================
+===================
 
 A number of changes have been implemented to either correct problems or
 improve the processed results.  The most significant of the changes are: