diff --git a/src/apps/ethereum/sign_message.py b/src/apps/ethereum/sign_message.py
index e4bc7d80fa..792da3bf70 100644
--- a/src/apps/ethereum/sign_message.py
+++ b/src/apps/ethereum/sign_message.py
@@ -24,7 +24,12 @@ async def sign_message(ctx, msg):
     address_n = msg.address_n or ()
     node = await seed.derive_node(ctx, address_n)
 
-    signature = secp256k1.sign(node.private_key(), message_digest(msg.message), False, secp256k1.CANONICAL_SIG_ETHEREUM)
+    signature = secp256k1.sign(
+        node.private_key(),
+        message_digest(msg.message),
+        False,
+        secp256k1.CANONICAL_SIG_ETHEREUM,
+    )
 
     sig = EthereumMessageSignature()
     sig.address = node.ethereum_pubkeyhash()
diff --git a/src/apps/ethereum/sign_tx.py b/src/apps/ethereum/sign_tx.py
index 28650ce011..1f4972358b 100644
--- a/src/apps/ethereum/sign_tx.py
+++ b/src/apps/ethereum/sign_tx.py
@@ -131,7 +131,9 @@ async def send_signature(ctx, msg: EthereumSignTx, digest):
     address_n = msg.address_n or ()
     node = await seed.derive_node(ctx, address_n)
 
-    signature = secp256k1.sign(node.private_key(), digest, False, secp256k1.CANONICAL_SIG_ETHEREUM)
+    signature = secp256k1.sign(
+        node.private_key(), digest, False, secp256k1.CANONICAL_SIG_ETHEREUM
+    )
 
     req = EthereumTxRequest()
     req.signature_v = signature[0]