diff --git a/CHANGES.md b/CHANGES.md
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--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,5 +1,8 @@
 # Change history of the dot package
 
+## v1.6.4
+
+- fix mermaid generation with string shape in node (issue #40)
 
 ## v1.6.3