diff --git a/README.md b/README.md
index 9d070e5..090da6c 100644
--- a/README.md
+++ b/README.md
@@ -12,6 +12,7 @@ license: mit
 datasets:
 - cc100
 - wikipedia
+- c4
 widget:
 - text: "西田幾多郎は、"
 ---