diff --git a/documents/flow/scan.md b/documents/flow/scan.md
index 595c1e0..b55f13f 100644
--- a/documents/flow/scan.md
+++ b/documents/flow/scan.md
@@ -1,4 +1,4 @@
-# スキャンフロー
+## スキャンフロー
diff --git a/documents/flow/viewer.md b/documents/flow/viewer.md
index 8fd7a4b..ff7df4d 100644
--- a/documents/flow/viewer.md
+++ b/documents/flow/viewer.md
@@ -1,4 +1,4 @@
-# ビューアフロー
+## ビューアフロー
diff --git a/documents/flow/viewer_combined.md b/documents/flow/viewer_combined.md
index c1cd7fe..0005ded 100644
--- a/documents/flow/viewer_combined.md
+++ b/documents/flow/viewer_combined.md
@@ -1,4 +1,4 @@
-# ビューア(結合済)フロー
+## ビューア(結合済)フロー