diff --git a/Cargo.lock b/Cargo.lock
index fa6b85a..8b0d4bd 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1617,7 +1617,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "39cab71617ae0d63f51a36d69f866391735b51691dbda63cf6f96d042b63efeb"
 dependencies = [
  "libc",
- "windows-sys 0.61.2",
+ "windows-sys 0.59.0",
 ]
 
 [[package]]
@@ -2845,7 +2845,7 @@ dependencies = [
 [[package]]
 name = "op-revm"
 version = "10.0.0"
-source = "git+https://github.com/SeismicSystems/seismic-revm.git?rev=45b4f4f036d324013636c9f3203012e58971c187#45b4f4f036d324013636c9f3203012e58971c187"
+source = "git+https://github.com/SeismicSystems/seismic-revm.git?rev=a8d131537b21abc9bcf2984b2e319893a47d4b2d#a8d131537b21abc9bcf2984b2e319893a47d4b2d"
 dependencies = [
  "auto_impl",
  "revm",
@@ -3311,7 +3311,7 @@ checksum = "d6f6ff9a378485b298a5286656da665ba74413d36db0979633275d2e708145d4"
 [[package]]
 name = "revm"
 version = "29.0.0"
-source = "git+https://github.com/SeismicSystems/seismic-revm.git?rev=45b4f4f036d324013636c9f3203012e58971c187#45b4f4f036d324013636c9f3203012e58971c187"
+source = "git+https://github.com/SeismicSystems/seismic-revm.git?rev=a8d131537b21abc9bcf2984b2e319893a47d4b2d#a8d131537b21abc9bcf2984b2e319893a47d4b2d"
 dependencies = [
  "revm-bytecode",
  "revm-context",
@@ -3329,7 +3329,7 @@ dependencies = [
 [[package]]
 name = "revm-bytecode"
 version = "6.2.2"
-source = "git+https://github.com/SeismicSystems/seismic-revm.git?rev=45b4f4f036d324013636c9f3203012e58971c187#45b4f4f036d324013636c9f3203012e58971c187"
+source = "git+https://github.com/SeismicSystems/seismic-revm.git?rev=a8d131537b21abc9bcf2984b2e319893a47d4b2d#a8d131537b21abc9bcf2984b2e319893a47d4b2d"
 dependencies = [
  "bitvec",
  "phf",
@@ -3340,7 +3340,7 @@ dependencies = [
 [[package]]
 name = "revm-context"
 version = "9.0.2"
-source = "git+https://github.com/SeismicSystems/seismic-revm.git?rev=45b4f4f036d324013636c9f3203012e58971c187#45b4f4f036d324013636c9f3203012e58971c187"
+source = "git+https://github.com/SeismicSystems/seismic-revm.git?rev=a8d131537b21abc9bcf2984b2e319893a47d4b2d#a8d131537b21abc9bcf2984b2e319893a47d4b2d"
 dependencies = [
  "bitvec",
  "cfg-if",
@@ -3356,7 +3356,7 @@ dependencies = [
 [[package]]
 name = "revm-context-interface"
 version = "10.1.0"
-source = "git+https://github.com/SeismicSystems/seismic-revm.git?rev=45b4f4f036d324013636c9f3203012e58971c187#45b4f4f036d324013636c9f3203012e58971c187"
+source = "git+https://github.com/SeismicSystems/seismic-revm.git?rev=a8d131537b21abc9bcf2984b2e319893a47d4b2d#a8d131537b21abc9bcf2984b2e319893a47d4b2d"
 dependencies = [
  "alloy-eip2930",
  "alloy-eip7702",
@@ -3371,7 +3371,7 @@ dependencies = [
 [[package]]
 name = "revm-database"
 version = "7.0.5"
-source = "git+https://github.com/SeismicSystems/seismic-revm.git?rev=45b4f4f036d324013636c9f3203012e58971c187#45b4f4f036d324013636c9f3203012e58971c187"
+source = "git+https://github.com/SeismicSystems/seismic-revm.git?rev=a8d131537b21abc9bcf2984b2e319893a47d4b2d#a8d131537b21abc9bcf2984b2e319893a47d4b2d"
 dependencies = [
  "alloy-eips",
  "revm-bytecode",
@@ -3384,7 +3384,7 @@ dependencies = [
 [[package]]
 name = "revm-database-interface"
 version = "7.0.5"
-source = "git+https://github.com/SeismicSystems/seismic-revm.git?rev=45b4f4f036d324013636c9f3203012e58971c187#45b4f4f036d324013636c9f3203012e58971c187"
+source = "git+https://github.com/SeismicSystems/seismic-revm.git?rev=a8d131537b21abc9bcf2984b2e319893a47d4b2d#a8d131537b21abc9bcf2984b2e319893a47d4b2d"
 dependencies = [
  "auto_impl",
  "either",
@@ -3396,7 +3396,7 @@ dependencies = [
 [[package]]
 name = "revm-handler"
 version = "10.0.0"
-source = "git+https://github.com/SeismicSystems/seismic-revm.git?rev=45b4f4f036d324013636c9f3203012e58971c187#45b4f4f036d324013636c9f3203012e58971c187"
+source = "git+https://github.com/SeismicSystems/seismic-revm.git?rev=a8d131537b21abc9bcf2984b2e319893a47d4b2d#a8d131537b21abc9bcf2984b2e319893a47d4b2d"
 dependencies = [
  "auto_impl",
  "derive-where",
@@ -3414,7 +3414,7 @@ dependencies = [
 [[package]]
 name = "revm-inspector"
 version = "10.0.0"
-source = "git+https://github.com/SeismicSystems/seismic-revm.git?rev=45b4f4f036d324013636c9f3203012e58971c187#45b4f4f036d324013636c9f3203012e58971c187"
+source = "git+https://github.com/SeismicSystems/seismic-revm.git?rev=a8d131537b21abc9bcf2984b2e319893a47d4b2d#a8d131537b21abc9bcf2984b2e319893a47d4b2d"
 dependencies = [
  "auto_impl",
  "either",
@@ -3431,7 +3431,7 @@ dependencies = [
 [[package]]
 name = "revm-interpreter"
 version = "25.0.2"
-source = "git+https://github.com/SeismicSystems/seismic-revm.git?rev=45b4f4f036d324013636c9f3203012e58971c187#45b4f4f036d324013636c9f3203012e58971c187"
+source = "git+https://github.com/SeismicSystems/seismic-revm.git?rev=a8d131537b21abc9bcf2984b2e319893a47d4b2d#a8d131537b21abc9bcf2984b2e319893a47d4b2d"
 dependencies = [
  "revm-bytecode",
  "revm-context-interface",
@@ -3443,7 +3443,7 @@ dependencies = [
 [[package]]
 name = "revm-precompile"
 version = "27.0.0"
-source = "git+https://github.com/SeismicSystems/seismic-revm.git?rev=45b4f4f036d324013636c9f3203012e58971c187#45b4f4f036d324013636c9f3203012e58971c187"
+source = "git+https://github.com/SeismicSystems/seismic-revm.git?rev=a8d131537b21abc9bcf2984b2e319893a47d4b2d#a8d131537b21abc9bcf2984b2e319893a47d4b2d"
 dependencies = [
  "ark-bls12-381",
  "ark-bn254",
@@ -3466,7 +3466,7 @@ dependencies = [
 [[package]]
 name = "revm-primitives"
 version = "20.2.1"
-source = "git+https://github.com/SeismicSystems/seismic-revm.git?rev=45b4f4f036d324013636c9f3203012e58971c187#45b4f4f036d324013636c9f3203012e58971c187"
+source = "git+https://github.com/SeismicSystems/seismic-revm.git?rev=a8d131537b21abc9bcf2984b2e319893a47d4b2d#a8d131537b21abc9bcf2984b2e319893a47d4b2d"
 dependencies = [
  "alloy-primitives",
  "num_enum",
@@ -3477,7 +3477,7 @@ dependencies = [
 [[package]]
 name = "revm-state"
 version = "7.0.5"
-source = "git+https://github.com/SeismicSystems/seismic-revm.git?rev=45b4f4f036d324013636c9f3203012e58971c187#45b4f4f036d324013636c9f3203012e58971c187"
+source = "git+https://github.com/SeismicSystems/seismic-revm.git?rev=a8d131537b21abc9bcf2984b2e319893a47d4b2d#a8d131537b21abc9bcf2984b2e319893a47d4b2d"
 dependencies = [
  "bitflags 2.13.1",
  "revm-bytecode",
@@ -3616,7 +3616,7 @@ dependencies = [
  "errno",
  "libc",
  "linux-raw-sys",
- "windows-sys 0.61.2",
+ "windows-sys 0.59.0",
 ]
 
 [[package]]
@@ -3882,7 +3882,7 @@ dependencies = [
 [[package]]
 name = "seismic-revm"
 version = "1.0.0"
-source = "git+https://github.com/SeismicSystems/seismic-revm.git?rev=45b4f4f036d324013636c9f3203012e58971c187#45b4f4f036d324013636c9f3203012e58971c187"
+source = "git+https://github.com/SeismicSystems/seismic-revm.git?rev=a8d131537b21abc9bcf2984b2e319893a47d4b2d#a8d131537b21abc9bcf2984b2e319893a47d4b2d"
 dependencies = [
  "auto_impl",
  "hkdf",
@@ -4242,7 +4242,7 @@ dependencies = [
  "getrandom 0.4.3",
  "once_cell",
  "rustix",
- "windows-sys 0.61.2",
+ "windows-sys 0.59.0",
 ]
 
 [[package]]
@@ -4751,7 +4751,7 @@ version = "0.1.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c2a7b1c03c876122aa43f3020e6c3c3ee5c05081c9a00739faf7503aeba10d22"
 dependencies = [
- "windows-sys 0.61.2",
+ "windows-sys 0.59.0",
 ]
 
 [[package]]
diff --git a/Cargo.toml b/Cargo.toml
index 395dad7..f7bd17a 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -87,6 +87,6 @@ alloy-sol-type-parser = { git = "https://github.com/SeismicSystems/seismic-alloy
 seismic-alloy-consensus = { git = "https://github.com/SeismicSystems/seismic-alloy.git", rev = "70d1fb739c411b86199578b1f190fbc03c27ccda" }
 
 # revm
-revm = { git = "https://github.com/SeismicSystems/seismic-revm.git", rev = "45b4f4f036d324013636c9f3203012e58971c187" }
-op-revm = { git = "https://github.com/SeismicSystems/seismic-revm.git", rev = "45b4f4f036d324013636c9f3203012e58971c187" }
-seismic-revm = { git = "https://github.com/SeismicSystems/seismic-revm.git", rev = "45b4f4f036d324013636c9f3203012e58971c187" }
+revm = { git = "https://github.com/SeismicSystems/seismic-revm.git", rev = "a8d131537b21abc9bcf2984b2e319893a47d4b2d" }
+op-revm = { git = "https://github.com/SeismicSystems/seismic-revm.git", rev = "a8d131537b21abc9bcf2984b2e319893a47d4b2d" }
+seismic-revm = { git = "https://github.com/SeismicSystems/seismic-revm.git", rev = "a8d131537b21abc9bcf2984b2e319893a47d4b2d" }
diff --git a/crates/evm/src/tx.rs b/crates/evm/src/tx.rs
index e72e453..c0ad06d 100644
--- a/crates/evm/src/tx.rs
+++ b/crates/evm/src/tx.rs
@@ -572,7 +572,12 @@ impl FromTxWithEncoded<SeismicTxEnvelope> for SeismicTransaction<TxEnv> {
     fn from_encoded_tx(tx: &SeismicTxEnvelope, sender: Address, _encoded: Bytes) -> Self {
         let tx_env = SeismicTransaction::<TxEnv>::from_recovered_tx(tx, sender);
 
-        Self { base: tx_env.base, tx_hash: tx_env.tx_hash, decryption_failed: false }
+        Self {
+            base: tx_env.base,
+            tx_hash: tx_env.tx_hash,
+            decryption_failed: false,
+            signed_read: false,
+        }
     }
 }
 
@@ -591,7 +596,7 @@ impl FromRecoveredTx<SeismicTxEnvelope> for SeismicTransaction<TxEnv> {
             SeismicTxEnvelope::Eip7702(tx) => TxEnv::from_recovered_tx(tx.tx(), sender),
             SeismicTxEnvelope::Seismic(tx) => TxEnv::from_recovered_tx(tx.tx(), sender),
         };
-        SeismicTransaction { base, tx_hash, decryption_failed: false }
+        SeismicTransaction { base, tx_hash, decryption_failed: false, signed_read: false }
     }
 }
 
diff --git a/crates/seismic-evm/src/block/mod.rs b/crates/seismic-evm/src/block/mod.rs
index 391c3dc..51a0c56 100644
--- a/crates/seismic-evm/src/block/mod.rs
+++ b/crates/seismic-evm/src/block/mod.rs
@@ -829,4 +829,62 @@ mod tests {
             "transaction one block past expiry should be rejected, but it was accepted"
         );
     }
+
+    /// A `SeismicEvmFactory`-built EVM must expose the tx-type precompile at `0x6A`: a
+    /// top-level call returns the transaction's EIP-2718 type byte as a 32-byte word — the
+    /// value `TxUtils.txType()` reads via `staticcall`. This is the standalone-crate proof
+    /// that re-pinning to the precompile revm actually wires `0x6A` into the factory.
+    #[test]
+    fn test_txtype_precompile_via_factory() {
+        fn probe(tx_type: u8, signed_read: bool, selector: &[u8]) -> U256 {
+            let mut state = StateBuilder::new_with_database(InMemoryDB::default()).build();
+            let mock_keys = Box::leak(Box::new(PurposeKeys::well_known()));
+            let evm_factory = SeismicEvmFactory::new_with_purpose_keys(mock_keys);
+            let mut evm = evm_factory.create_evm(
+                &mut state,
+                EvmEnv::new(CfgEnv::new_with_spec(SeismicSpecId::MERCURY), BlockEnv::default()),
+            );
+
+            let tx = SeismicTransaction {
+                base: TxEnv {
+                    caller: Address::ZERO,
+                    kind: TxKind::Call(Address::with_last_byte(0x6A)),
+                    nonce: 0,
+                    gas_limit: 1_000_000,
+                    gas_price: 0,
+                    gas_priority_fee: None,
+                    value: U256::ZERO,
+                    data: Bytes::copy_from_slice(selector),
+                    chain_id: None,
+                    access_list: Default::default(),
+                    blob_hashes: Vec::new(),
+                    max_fee_per_blob_gas: 0,
+                    tx_type,
+                    authorization_list: Default::default(),
+                },
+                tx_hash: Default::default(),
+                decryption_failed: false,
+                signed_read,
+            };
+
+            let out = match evm.transact(tx).expect("transact to 0x6A").result {
+                ExecutionResult::Success { output, .. } => output.into_data(),
+                other => panic!("call to 0x6A precompile failed: {other:?}"),
+            };
+            assert_eq!(out.len(), 32, "tx-context precompile must return a 32-byte word");
+            U256::from_be_slice(&out)
+        }
+
+        // Empty selector → the raw EIP-2718 tx type.
+        assert_eq!(probe(0x4A, false, &[]), U256::from(0x4Au64));
+        assert_eq!(probe(0, false, &[]), U256::ZERO);
+
+        // Selector 0x01 → `signed_read && tx_type == 74`.
+        assert_eq!(probe(0x4A, true, &[0x01]), U256::from(1u64));
+        assert_eq!(probe(0x4A, false, &[0x01]), U256::ZERO);
+        // Raw signed_read=true on a non-Seismic type is normalized to 0 (isSignedRead =>
+        // isSeismicTx).
+        assert_eq!(probe(0, true, &[0x01]), U256::ZERO);
+        assert_eq!(probe(2, true, &[0x01]), U256::ZERO);
+    }
 }
diff --git a/crates/seismic-evm/src/lib.rs b/crates/seismic-evm/src/lib.rs
index 31dd520..5f3cbe2 100644
--- a/crates/seismic-evm/src/lib.rs
+++ b/crates/seismic-evm/src/lib.rs
@@ -214,6 +214,7 @@ where
             },
             tx_hash: Default::default(),
             decryption_failed: false,
+            signed_read: false,
         };
 
         let mut gas_limit = tx.base.gas_limit;