diff --git a/src/rpc/rpc_server.rs b/src/rpc/rpc_server.rs
index 1c6bc8d2..4d14b790 100644
--- a/src/rpc/rpc_server.rs
+++ b/src/rpc/rpc_server.rs
@@ -51,7 +51,7 @@ where
 
 	trace!(
 		"Request message: {}",
-		serde_json::to_string(&msg).unwrap_or("<json error>".into())
+		serde_json::to_string(&msg).unwrap_or("<json error>".into()).chars().take(100).collect::<String>()
 	);
 
 	match handler(msg, sockaddr).await {
diff --git a/src/table/merkle.rs b/src/table/merkle.rs
index a917a028..f60be8a8 100644
--- a/src/table/merkle.rs
+++ b/src/table/merkle.rs
@@ -56,6 +56,7 @@ pub struct MerkleNodeKey {
 	pub partition: MerklePartition,
 
 	// prefix: a prefix for the hash of full keys, i.e. hash(hash(partition_key)+sort_key)
+	#[serde(with = "serde_bytes")]
 	pub prefix: Vec<u8>,
 }