diff --git a/CHANGELOG-Japanese.md b/CHANGELOG-Japanese.md
index d4e8d690f..5a58c60be 100644
--- a/CHANGELOG-Japanese.md
+++ b/CHANGELOG-Japanese.md
@@ -12,6 +12,11 @@
   * eid-metrics
   * log-metrics
   * search
+- `utf16/utf16be/utf16le/wide`フィールドモディファイアが`base64offset|contains`フィールドモディファイアと一緒に使えるようになった。 (#1432) (@fukusuket)
+  * `utf16|base64offset|contains`
+  * `utf16be|base64offset|contains`
+  * `utf16le|base64offset|contains`
+  * `wide|base64offset|contains`
 
 **改善:**
 
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 768007bcd..5fa06afb6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -12,6 +12,11 @@
   * eid-metrics
   * log-metrics
   * search
+- Support for `utf16/utf16be/utf16le/wide` field modifiers to be used with the `base64offset|contains` field modifier. (#1432) (@fukusuket)
+  * `utf16|base64offset|contains`
+  * `utf16be|base64offset|contains`
+  * `utf16le|base64offset|contains`
+  * `wide|base64offset|contains`
 
 **Enhancements:**