diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2293998..32be70c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,7 @@
 # Master
 
 - Python 2.7.17 now available on Heroku 18 and 16.
+- Deprecation warning: BUILD_WITH_GEO_LIBRARIES is now deprecated. See warning for details.
 
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 # 158 (2019-10-21)