diff --git a/ethcore/res/tendermint.json b/ethcore/res/tendermint.json
index 8aa8f24f7..2f40d707b 100644
--- a/ethcore/res/tendermint.json
+++ b/ethcore/res/tendermint.json
@@ -4,7 +4,7 @@
 		"Tendermint": {
 			"params": {
 				"gasLimitBoundDivisor": "0x0400",
-				"validators" : [
+				"authorities" : [
 					"0x7d577a597b2742b498cb5cf0c26cdcd726d39e6e",
 					"0x82a978b3f5962a5b0957d9ee9eef472ee55b42f1"
 				]
diff --git a/ethcore/src/spec/spec.rs b/ethcore/src/spec/spec.rs
index d86f7ec46..5b861c25e 100644
--- a/ethcore/src/spec/spec.rs
+++ b/ethcore/src/spec/spec.rs
@@ -279,7 +279,7 @@ impl Spec {
 	}
 
 	/// Create a new Spec with Tendermint consensus which does internal sealing (not requiring work).
-	/// Account "0".sha3() and "1".sha3() are a validators.
+	/// Account "0".sha3() and "1".sha3() are a authorities.
 	pub fn new_test_tendermint() -> Self {
 		Spec::load(include_bytes!("../../res/tendermint.json") as &[u8]).expect("tendermint.json is invalid")
 	}
diff --git a/json/src/spec/tendermint.rs b/json/src/spec/tendermint.rs
index 97c30fbb2..3d1a5a06d 100644
--- a/json/src/spec/tendermint.rs
+++ b/json/src/spec/tendermint.rs
@@ -26,7 +26,7 @@ pub struct TendermintParams {
 	#[serde(rename="gasLimitBoundDivisor")]
 	pub gas_limit_bound_divisor: Uint,
 	/// Valid authorities
-	pub validators: Vec<Address>,
+	pub authorities: Vec<Address>,
 }
 
 /// Tendermint engine deserialization.
@@ -46,7 +46,7 @@ mod tests {
 		let s = r#"{
 			"params": {
 				"gasLimitBoundDivisor": "0x0400",
-				"validators" : ["0xc6d9d2cd449a754c494264e1809c50e34d64562b"]
+				"authorities" : ["0xc6d9d2cd449a754c494264e1809c50e34d64562b"]
 			}
 		}"#;