Added information about the zlib version update in the changelog
diff --git a/docs/CHANGES b/docs/CHANGES
index 3c6a877..85c1542 100644
--- a/docs/CHANGES
+++ b/docs/CHANGES
@@ -75,6 +75,10 @@ CHANGES BETWEEN 2.12.1 and 2.13.0 (2023-Feb-09)
af_debug_hints_
```
+ - The internal zlib library was updated to version 1.2.13. Note,
+ however, that FreeType is *not* affected by CVE-2022-37434 since
+ it doesn't use the `inflateGetHeader` function.
+
======================================================================