diff --git a/src/consts.rs b/src/consts.rs
index 232f08f..cca2fe2 100644
--- a/src/consts.rs
+++ b/src/consts.rs
@@ -29,7 +29,7 @@ pub const INITIAL_REWARD_RATE: u64 = 10u64.pow(3u32);
 
 /// The initial hashing difficulty. The admin authority can update this in the future, if needed.
 pub const INITIAL_DIFFICULTY: Hash = Hash::new_from_array([
-    0, 0, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+    0, 0, 0, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
     255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
 ]);