diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8c222c430..2c90bd682 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,9 @@
 
 ## Unreleased
 
+- Removed vulnerable versions of flask and requests
+([#1207](https://github.com/census-instrumentation/opencensus-python/pull/1207))
+
 # 0.11.1
 Released 2023-01-18