diff --git a/runtime/src/lib.rs b/runtime/src/lib.rs
index 56b1d1926..c4a71e947 100644
--- a/runtime/src/lib.rs
+++ b/runtime/src/lib.rs
@@ -12,6 +12,7 @@ pub mod check_nonce;
 mod migrations;
 
 use codec::{Compact, Decode, Encode};
+use frame_support::pallet_prelude::InvalidTransaction;
 use frame_support::traits::{Imbalance, InsideBoth};
 use frame_support::{
     dispatch::DispatchResultWithPostInfo,
@@ -1596,6 +1597,14 @@ impl_runtime_apis! {
             tx: <Block as BlockT>::Extrinsic,
             block_hash: <Block as BlockT>::Hash,
         ) -> TransactionValidity {
+            use codec::DecodeLimit;
+            use frame_support::pallet_prelude::ValidateUnsigned;
+            use frame_support::traits::ExtrinsicCall;
+            let encoded = tx.call().encode();
+            if let Err(e) = <Runtime as ValidateUnsigned>::Call::decode_all_with_depth_limit(100, &mut encoded.as_slice()) {
+                log::warn!("Failed to decode call: {:?}", e);
+                return Err(TransactionValidityError::Invalid(InvalidTransaction::Call));
+            }
             Executive::validate_transaction(source, tx, block_hash)
         }
     }