Update CHANGELOG.
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 36bfcf2..bab5b30 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,7 @@
 # 1.3.7
 
 * Split help into verbose and non-verbose lists (#938).
+* Don't crash when non-ASCII whitespace is trimmed (#901).
 
 # 1.3.6