diff --git a/CHANGELOG.md b/CHANGELOG.md
index 39e5dd8dd2..60d03b7855 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -46,6 +46,7 @@ Ref: https://keepachangelog.com/en/1.0.0/
 * (rpc) [#955](https://github.com/tharsis/ethermint/pull/955) Fix websocket server push duplicated messages to subscriber.
 * (ante) [tharsis#964](https://github.com/tharsis/ethermint/pull/964) add NewInfiniteGasMeterWithLimit for storing the user provided gas limit. Fixes block's consumed gas calculation in the block creation phase. (Modified to only fix check tx mode to avoid breaking consensus).
 * (evm) [\#529](https://github.com/tharsis/ethermint/issues/529) support return value on trace tx response.
+* (rpc) [tharsis#1006](https://github.com/tharsis/ethermint/pull/1006) Use `string` as the parameters type to correct ambiguous results.
 
 ## [v0.7.2-cronos-6] - 2021-12-17
 
diff --git a/rpc/ethereum/namespaces/web3/api.go b/rpc/ethereum/namespaces/web3/api.go
index 54af350db6..04fbee76bc 100644
--- a/rpc/ethereum/namespaces/web3/api.go
+++ b/rpc/ethereum/namespaces/web3/api.go
@@ -21,6 +21,6 @@ func (a *PublicAPI) ClientVersion() string {
 }
 
 // Sha3 returns the keccak-256 hash of the passed-in input.
-func (a *PublicAPI) Sha3(input hexutil.Bytes) hexutil.Bytes {
-	return crypto.Keccak256(input)
+func (a *PublicAPI) Sha3(input string) hexutil.Bytes {
+	return crypto.Keccak256(hexutil.Bytes(input))
 }
diff --git a/tests/e2e/integration_test.go b/tests/e2e/integration_test.go
index afcc1bd61a..4d7d94adc0 100644
--- a/tests/e2e/integration_test.go
+++ b/tests/e2e/integration_test.go
@@ -53,3 +53,37 @@ func (s *IntegrationTestSuite) TestChainID() {
 func TestIntegrationTestSuite(t *testing.T) {
 	suite.Run(t, new(IntegrationTestSuite))
 }
+
+func (s *IntegrationTestSuite) TestWeb3Sha3() {
+	testCases := []struct {
+		name     string
+		arg      string
+		expected string
+	}{
+		{
+			"normal input",
+			"0xabcd1234567890",
+			"0x23e7488ec9097f0126b0338926bfaeb5264b01cb162a0fd4a6d76e1081c2b24a",
+		},
+		{
+			"0x case",
+			"0x",
+			"0x39bef1777deb3dfb14f64b9f81ced092c501fee72f90e93d03bb95ee89df9837",
+		},
+		{
+			"empty string case",
+			"",
+			"0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470",
+		},
+	}
+
+	for _, tc := range testCases {
+		s.Run(tc.name, func() {
+			var result string
+
+			err := s.rpcClient.Call(&result, "web3_sha3", tc.arg)
+			s.Require().NoError(err)
+			s.Require().Equal(tc.expected, result)
+		})
+	}
+}