diff --git a/core/src/genesis.rs b/core/src/genesis.rs
index 2e58bed89..92b5f4c61 100644
--- a/core/src/genesis.rs
+++ b/core/src/genesis.rs
@@ -116,14 +116,17 @@ pub fn genesis_testnet4() -> core::Block {
 			total_difficulty: Difficulty::from_num(global::initial_block_difficulty()),
 			secondary_scaling: global::initial_graph_weight(),
 			nonce: 8612241555342799290,
-			proof: Proof::new(vec![
-				0x46f3b4, 0x1135f8c, 0x1a1596f, 0x1e10f71, 0x41c03ea, 0x63fe8e7, 0x65af34f,
-				0x73c16d3, 0x8216dc3, 0x9bc75d0, 0xae7d9ad, 0xc1cb12b, 0xc65e957, 0xf67a152,
-				0xfac6559, 0x100c3d71, 0x11eea08b, 0x1225dfbb, 0x124d61a1, 0x132a14b4, 0x13f4ec38,
-				0x1542d236, 0x155f2df0, 0x1577394e, 0x163c3513, 0x19349845, 0x19d46953, 0x19f65ed4,
-				0x1a0411b9, 0x1a2fa039, 0x1a72a06c, 0x1b02ddd2, 0x1b594d59, 0x1b7bffd3, 0x1befe12e,
-				0x1c82e4cd, 0x1d492478, 0x1de132a5, 0x1e578b3c, 0x1ed96855, 0x1f222896, 0x1fea0da6,
-			]),
+			proof: Proof {
+				nonces: vec![
+					0x46f3b4, 0x1135f8c, 0x1a1596f, 0x1e10f71, 0x41c03ea, 0x63fe8e7, 0x65af34f,
+					0x73c16d3, 0x8216dc3, 0x9bc75d0, 0xae7d9ad, 0xc1cb12b, 0xc65e957, 0xf67a152,
+					0xfac6559, 0x100c3d71, 0x11eea08b, 0x1225dfbb, 0x124d61a1, 0x132a14b4, 0x13f4ec38,
+					0x1542d236, 0x155f2df0, 0x1577394e, 0x163c3513, 0x19349845, 0x19d46953, 0x19f65ed4,
+					0x1a0411b9, 0x1a2fa039, 0x1a72a06c, 0x1b02ddd2, 0x1b594d59, 0x1b7bffd3, 0x1befe12e,
+					0x1c82e4cd, 0x1d492478, 0x1de132a5, 0x1e578b3c, 0x1ed96855, 0x1f222896, 0x1fea0da6,
+				],
+				edge_bits: 29,
+			},
 		},
 		..Default::default()
 	})