diff --git a/CHANGELOG.md b/CHANGELOG.md
index 39f6840..a387976 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,6 @@
 # 1.1.0
 
+ * [security] Rebuild image using latest upstream python:3.7-alpine tag to fix CVE-2019-5021 (#10)
  * [dependencies] Bump twisted from 18.9.0 to 19.2.1 (#6)
 
 # 1.0.0