diff --git a/oracle/rpc/runtime-api/src/lib.rs b/oracle/rpc/runtime-api/src/lib.rs
index f39bb7f03b245350c920a2990f6dad4549e5899b..c250569bc8375cf1916529d407ed0eb496213be4 100644
--- a/oracle/rpc/runtime-api/src/lib.rs
+++ b/oracle/rpc/runtime-api/src/lib.rs
@@ -3,6 +3,8 @@
 #![cfg_attr(not(feature = "std"), no_std)]
 // The `too_many_arguments` warning originates from `decl_runtime_apis` macro.
 #![allow(clippy::too_many_arguments)]
+// The `unnecessary_mut_passed` warning originates from `decl_runtime_apis` macro.
+#![allow(clippy::unnecessary_mut_passed)]
 
 use codec::Codec;
 use sp_std::prelude::Vec;