diff --git a/CHANGELOG.md b/CHANGELOG.md
index edbd7e9..784db7b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 ## Development
 
+### Added
+
+- `X-Api-Client` header
+
 ## 1.1.0
 
 ### Added