diff --git a/crates/rkgk/src/api/wall.rs b/crates/rkgk/src/api/wall.rs
index a1a3445..ab13378 100644
--- a/crates/rkgk/src/api/wall.rs
+++ b/crates/rkgk/src/api/wall.rs
@@ -320,6 +320,10 @@ impl SessionLoop {
                     wall::EventKind::Edit { edits } => {
                         let chunk_data = recv_expect(ws).await?.into_data();
 
+                        if edits.len() > self.wall.settings().max_edit_size {
+                            bail!("too many chunks modified in one edit");
+                        }
+
                         let mut edits_with_data = Vec::with_capacity(edits.len());
                         for edit in edits {
                             if let Some(data) = chunk_data