diff --git a/src/tools/session_send.rs b/src/tools/session_send.rs
index ce4573e..f175ff3 100644
--- a/src/tools/session_send.rs
+++ b/src/tools/session_send.rs
@@ -456,7 +456,7 @@ fn parse_attachments(value: &serde_json::Value) -> anyhow::Result<Vec<MediaItem>
             return Err(anyhow!("attachment file is empty: {}", raw_path));
         }
 
-        let content_base64 = (metadata.len() <= 50 * 1024 * 1024)
+        let content_base64 = (metadata.len() <= 200 * 1024 * 1024)
             .then(|| {
                 let mut file = std::fs::File::open(&resolved_path)?;
                 let mut buf = Vec::with_capacity(metadata.len() as usize);