diff --git a/client/cmd.go b/client/cmd.go
index d5e9f86952..63c3116945 100644
--- a/client/cmd.go
+++ b/client/cmd.go
@@ -250,7 +250,6 @@ func readTxCommandFlags(clientCtx Context, flagSet *pflag.FlagSet) (Context, err
 			clientCtx = clientCtx.WithSignModeStr(flags.SignModeLegacyAminoJSON)
 		}
 	}
-
 	return clientCtx, nil
 }
 
diff --git a/client/flags/flags.go b/client/flags/flags.go
index 32763cc276..f2a1b5f354 100644
--- a/client/flags/flags.go
+++ b/client/flags/flags.go
@@ -36,6 +36,8 @@ const (
 	SignModeDirect = "direct"
 	// SignModeLegacyAminoJSON is the value of the --sign-mode flag for SIGN_MODE_LEGACY_AMINO_JSON
 	SignModeLegacyAminoJSON = "amino-json"
+	// SignModeEIP191 is the value of the --sign-mode flag for SIGN_MODE_EIP_191
+	SignModeEIP191 = "eip-191"
 )
 
 // List of CLI flags
diff --git a/client/tx/factory.go b/client/tx/factory.go
index 6cddad4154..9628aa8776 100644
--- a/client/tx/factory.go
+++ b/client/tx/factory.go
@@ -43,6 +43,8 @@ func NewFactoryCLI(clientCtx client.Context, flagSet *pflag.FlagSet) Factory {
 		signMode = signing.SignMode_SIGN_MODE_DIRECT
 	case flags.SignModeLegacyAminoJSON:
 		signMode = signing.SignMode_SIGN_MODE_LEGACY_AMINO_JSON
+	case flags.SignModeEIP191:
+		signMode = signing.SignMode_SIGN_MODE_EIP_191
 	}
 
 	accNum, _ := flagSet.GetUint64(flags.FlagAccountNumber)
diff --git a/proto/cosmos/tx/signing/v1beta1/signing.proto b/proto/cosmos/tx/signing/v1beta1/signing.proto
index f7fce76f5b..31eeb220c1 100644
--- a/proto/cosmos/tx/signing/v1beta1/signing.proto
+++ b/proto/cosmos/tx/signing/v1beta1/signing.proto
@@ -24,6 +24,18 @@ enum SignMode {
   // SIGN_MODE_LEGACY_AMINO_JSON is a backwards compatibility mode which uses
   // Amino JSON and will be removed in the future
   SIGN_MODE_LEGACY_AMINO_JSON = 127;
+
+  // SIGN_MODE_EIP_191 specifies the sign mode for EIP 191 signing on the Cosmos
+  // SDK. Ref: https://eips.ethereum.org/EIPS/eip-191
+  // 
+  // Currently, SIGN_MODE_EIP_191 is registered as a SignMode enum variant,
+  // but is not implemented on the SDK by default. To enable EIP-191, you need
+  // to pass a custom `TxConfig` that has an implementation of
+  // `SignModeHandler` for EIP-191. The SDK may decide to fully support
+  // EIP-191 in the future.
+  //
+  // Since: cosmos-sdk 0.45.2
+  SIGN_MODE_EIP_191 = 191;
 }
 
 // SignatureDescriptors wraps multiple SignatureDescriptor's.
diff --git a/types/tx/signing/signing.pb.go b/types/tx/signing/signing.pb.go
index 5069f11aa8..c31d37c06b 100644
--- a/types/tx/signing/signing.pb.go
+++ b/types/tx/signing/signing.pb.go
@@ -41,6 +41,11 @@ const (
 	// SIGN_MODE_LEGACY_AMINO_JSON is a backwards compatibility mode which uses
 	// Amino JSON and will be removed in the future
 	SignMode_SIGN_MODE_LEGACY_AMINO_JSON SignMode = 127
+	// SIGN_MODE_EIP_191 specifies the sign mode for EIP 191 signing on the Cosmos
+	// SDK. Ref: https://eips.ethereum.org/EIPS/eip-191
+	//
+	// Since: cosmos-sdk 0.45
+	SignMode_SIGN_MODE_EIP_191 SignMode = 191
 )
 
 var SignMode_name = map[int32]string{
@@ -48,6 +53,7 @@ var SignMode_name = map[int32]string{
 	1:   "SIGN_MODE_DIRECT",
 	2:   "SIGN_MODE_TEXTUAL",
 	127: "SIGN_MODE_LEGACY_AMINO_JSON",
+	191: "SIGN_MODE_EIP_191",
 }
 
 var SignMode_value = map[string]int32{
@@ -55,6 +61,7 @@ var SignMode_value = map[string]int32{
 	"SIGN_MODE_DIRECT":            1,
 	"SIGN_MODE_TEXTUAL":           2,
 	"SIGN_MODE_LEGACY_AMINO_JSON": 127,
+	"SIGN_MODE_EIP_191":           191,
 }
 
 func (x SignMode) String() string {
diff --git a/x/auth/tx/config.go b/x/auth/tx/config.go
index 2329240cf9..934d516978 100644
--- a/x/auth/tx/config.go
+++ b/x/auth/tx/config.go
@@ -23,9 +23,16 @@ type config struct {
 
 // NewTxConfig returns a new protobuf TxConfig using the provided ProtoCodec and sign modes. The
 // first enabled sign mode will become the default sign mode.
+// NOTE: Use NewTxConfigWithHandler to provide a custom signing handler in case the sign mode
+// is not supported by default (eg: SignMode_SIGN_MODE_EIP_191).
 func NewTxConfig(protoCodec codec.ProtoCodecMarshaler, enabledSignModes []signingtypes.SignMode) client.TxConfig {
+	return NewTxConfigWithHandler(protoCodec, makeSignModeHandler(enabledSignModes))
+}
+
+// NewTxConfig returns a new protobuf TxConfig using the provided ProtoCodec and signing handler.
+func NewTxConfigWithHandler(protoCodec codec.ProtoCodecMarshaler, handler signing.SignModeHandler) client.TxConfig {
 	return &config{
-		handler:     makeSignModeHandler(enabledSignModes),
+		handler:     handler,
 		decoder:     DefaultTxDecoder(protoCodec),
 		encoder:     DefaultTxEncoder(),
 		jsonDecoder: DefaultJSONTxDecoder(protoCodec),