diff --git a/cryptol-remote-api/python/CHANGELOG.md b/cryptol-remote-api/python/CHANGELOG.md
index 9891041a9..75383a288 100644
--- a/cryptol-remote-api/python/CHANGELOG.md
+++ b/cryptol-remote-api/python/CHANGELOG.md
@@ -3,6 +3,7 @@
 ## 2.12.4 -- YYYY-MM-DD
 
 * NEW CHANGELOG ENTRIES SINCE 2.12.2 GO HERE
+* fix: add `typing-extensions` as an explicit dependency for the client.
 
 ## 2.12.2 -- 2021-12-21