updated CHANGELOG.md [ci skip]
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8516e74..fa4ed30 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
# Changelog
+### [1.9.3](https://www.github.com/googleapis/google-api-python-client/compare/v1.9.2...v1.9.3) (2020-06-10)
+
+
+### Bug Fixes
+
+* update GOOGLE_API_USE_MTLS values ([#940](https://www.github.com/googleapis/google-api-python-client/issues/940)) ([19908ed](https://www.github.com/googleapis/google-api-python-client/commit/19908edcd8a3df1db41e34100acc1f15c3c99397))
+
### [1.9.2](https://www.github.com/googleapis/google-api-python-client/compare/v1.9.1...v1.9.2) (2020-06-04)
