diff --git a/Sora/Sora.cs b/Sora/Sora.cs
index c7309b2..3ff3197 100644
--- a/Sora/Sora.cs
+++ b/Sora/Sora.cs
@@ -50,7 +50,10 @@ public enum SpotlightFocusRidType
         R1,
         R2,
     }
-
+    public class Header
+    {
+        public List<string> content { get; set; } = new List<string>();
+    }
     public class DataChannel
     {
         // 以下は設定必須
@@ -62,7 +65,8 @@ public class DataChannel
         public int? MaxRetransmits;
         public string? Protocol;
         public bool? Compress;
-        public string? Header;
+        public Header? Header;
+
     }
 
     public const string ActionBlock = "block";
@@ -457,7 +461,7 @@ public void Connect(Config config)
             }
             if (m.Header != null)
             {
-                c.SetHeader(m.Header);
+                c.SetHeader(new SoraConf.Internal.Header { content = new List<string>(m.Header.content) });
             }
             cc.data_channels.Add(c);
         }
diff --git a/src/sora.cpp b/src/sora.cpp
index 1b20c9a..28d495e 100644
--- a/src/sora.cpp
+++ b/src/sora.cpp
@@ -421,8 +421,11 @@ void Sora::DoConnect(const sora_conf::internal::ConnectConfig& cc,
       }
       if (dc.has_header()) {
         const auto& header_content = dc.header.content;
-        d.header->insert(d.header->end(), header_content.begin(),
-                         header_content.end());
+        d.header->reserve(header_content.size());
+        for (const auto& json_str : header_content) {
+          auto parsed = boost::json::parse(json_str);
+          d.header->push_back(std::move(parsed));
+        }
       }
       config.data_channels.push_back(std::move(d));
     }