diff --git a/lib/src/ethereum.dart b/lib/src/ethereum.dart
index 39e602b..b0fad74 100644
--- a/lib/src/ethereum.dart
+++ b/lib/src/ethereum.dart
@@ -53,7 +53,7 @@ EthSignature ethereumSign(PrivateKey priv, List<int> hash) {
     throw Exception('calculated R is zero');
   }
   var y = p.Y % priv.curve.n;
-  var v = (y % BigInt.two).toInt();
+  var v = (y & BigInt.one).toInt();
 
   var e = bitsToInt(hash, priv.curve.n.bitLength);
   var s = priv.D * r + e;
@@ -61,6 +61,8 @@ EthSignature ethereumSign(PrivateKey priv, List<int> hash) {
 
   if (s > (priv.curve.n >> 1)) {
     s = priv.curve.n - s;
+    // https://ethereum.stackexchange.com/a/53182
+    v ^= 1;
   }
 
   if (s.sign == 0) {
diff --git a/test/ecdsa_test.dart b/test/ecdsa_test.dart
index 94f7f84..fefc43b 100644
--- a/test/ecdsa_test.dart
+++ b/test/ecdsa_test.dart
@@ -126,5 +126,36 @@ void main() {
           BigInt.parse(
               '46948507304638947509940763649030358759909902576025900602547168820602576006531'));
     });
+
+    test('ethereum sign #6', () {
+      var hash = List<int>.generate(
+          32,
+          (index) => int.parse(
+              'b6e16d27ac5ab427a7f68900ac5559ce272dc6c37c82b3e052246c82244c50e4'
+                  .substring(2 * index, 2 * index + 2),
+              radix: 16));
+      var priv = PrivateKey(
+          getS256(),
+          BigInt.parse(
+              'e4d7f99de955728c9921a3de9f2bcdaeb54938da0b1179fdd2275d7ce09dd002',
+              radix: 16));
+
+      var sig = ethereumSign(priv, hash);
+      print(sig.toEthCompactHex());
+      expect(sig.getEIP155V(1), equals(37));
+      expect(sig.getV(), equals(27));
+      expect(
+          sig.R,
+          equals(BigInt.parse(
+              '0x96df6608b777f7642e741b97843475ab29981bca31c2f47d657b43ff7b460d21')));
+      expect(
+          sig.S,
+          BigInt.parse(
+              '0x48def6cd02fb866ac45f736dcc6829f1ca34c1f112805eae0c73981aecee9428'));
+      expect(
+          EthSignature.fromRSV(sig.R, sig.S, sig.getV()).toEthCompactHex(),
+          equals(
+              '96df6608b777f7642e741b97843475ab29981bca31c2f47d657b43ff7b460d2148def6cd02fb866ac45f736dcc6829f1ca34c1f112805eae0c73981aecee94281b'));
+    });
   });
 }