diff --git a/ethers/providers/jsonrpc.nim b/ethers/providers/jsonrpc.nim
index 2cc37b5..3e097db 100644
--- a/ethers/providers/jsonrpc.nim
+++ b/ethers/providers/jsonrpc.nim
@@ -301,7 +301,7 @@ method provider*(signer: JsonRpcSigner): Provider {.gcsafe, raises: [SignerError
   signer.provider
 
 method getAddress*(
-  signer: JsonRpcSigner): Future[Address] {.async.} =
+  signer: JsonRpcSigner): Future[Address] {.async: (raises:[SignerError]).} =
 
   if address =? signer.address:
     return address
@@ -324,7 +324,8 @@ method signMessage*(
 
 method sendTransaction*(
   signer: JsonRpcSigner,
-  transaction: Transaction): Future[TransactionResponse] {.async.} =
+  transaction: Transaction): Future[TransactionResponse]
+  {.async: (raises:[SignerError]).} =
 
   convertSignerError:
     if nonce =? transaction.nonce:
diff --git a/ethers/signer.nim b/ethers/signer.nim
index df05eba..3a70dc7 100644
--- a/ethers/signer.nim
+++ b/ethers/signer.nim
@@ -40,7 +40,7 @@ method provider*(
   doAssert false, "not implemented"
 
 method getAddress*(
-  signer: Signer): Future[Address] {.base, async.} =
+  signer: Signer): Future[Address] {.base, async: (raises:[SignerError]).} =
 
   doAssert false, "not implemented"
 
@@ -53,7 +53,7 @@ method signMessage*(
 method sendTransaction*(
   signer: Signer,
   transaction: Transaction): Future[TransactionResponse]
-  {.base, async.} =
+  {.base, async: (raises:[SignerError]).} =
 
   doAssert false, "not implemented"
 
diff --git a/ethers/signers/wallet.nim b/ethers/signers/wallet.nim
index c622c21..d757b62 100644
--- a/ethers/signers/wallet.nim
+++ b/ethers/signers/wallet.nim
@@ -67,7 +67,9 @@ method provider*(wallet: Wallet): Provider {.gcsafe, raises: [SignerError].} =
     raiseWalletError "Wallet has no provider"
   provider
 
-method getAddress*(wallet: Wallet): Future[Address] {.async.} =
+method getAddress*(
+  wallet: Wallet): Future[Address] {.async: (raises:[SignerError]).} =
+
   return wallet.address
 
 proc signTransaction*(wallet: Wallet,
@@ -79,7 +81,8 @@ proc signTransaction*(wallet: Wallet,
 
 method sendTransaction*(
   wallet: Wallet,
-  transaction: Transaction): Future[TransactionResponse] {.async.} =
+  transaction: Transaction): Future[TransactionResponse]
+  {.async: (raises:[SignerError]).} =
 
   convertError:
     let signed = await signTransaction(wallet, transaction)
diff --git a/testmodule/mocks.nim b/testmodule/mocks.nim
index 30584e1..7e3d877 100644
--- a/testmodule/mocks.nim
+++ b/testmodule/mocks.nim
@@ -11,10 +11,14 @@ func new*(_: type MockSigner, provider: Provider): MockSigner =
 method provider*(signer: MockSigner): Provider =
   signer.provider
 
-method getAddress*(signer: MockSigner): Future[Address] {.async.} =
+method getAddress*(
+  signer: MockSigner): Future[Address] {.async: (raises:[SignerError]).} =
+
   return signer.address
 
-method sendTransaction*(signer: MockSigner,
-                        transaction: Transaction):
-                       Future[TransactionResponse] {.async.} =
+method sendTransaction*(
+  signer: MockSigner,
+  transaction: Transaction): Future[TransactionResponse]
+  {.async: (raises:[SignerError]).} =
+
   signer.transactions.add(transaction)