diff --git a/src/brc20/operation/mod.rs b/src/brc20/operation/mod.rs
index 0501fa8840..08da43b775 100644
--- a/src/brc20/operation/mod.rs
+++ b/src/brc20/operation/mod.rs
@@ -21,13 +21,7 @@ pub enum Operation {
 }
 
 pub fn deserialize_brc20(s: &str) -> Result<Operation, JSONError> {
-  let mut value: Value = serde_json::from_str(s).map_err(|_| JSONError::InvalidJson)?;
-  let entry = value.as_object_mut().ok_or(JSONError::InvalidJson)?;
-  *entry = std::mem::take(entry)
-    .into_iter()
-    .map(|(k, v)| (k.to_lowercase(), v))
-    .collect();
-
+  let value: Value = serde_json::from_str(s).map_err(|_| JSONError::InvalidJson)?;
   if value.get("p") != Some(&json!(PROTOCOL_LITERAL)) {
     return Err(JSONError::NotBRC20Json);
   }
@@ -135,14 +129,6 @@ mod tests {
 }}"##
     );
 
-    assert_eq!(
-      deserialize_brc20(&json_str).unwrap(),
-      Operation::Deploy(Deploy {
-        tick: "ordi".to_string(),
-        max_supply,
-        mint_limit: Some(mint_limit),
-        decimals: None
-      })
-    );
+    assert_eq!(deserialize_brc20(&json_str), Err(JSONError::NotBRC20Json));
   }
 }