diff --git a/src/main.rs b/src/main.rs
index b2a2e69..e8bbd9f 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -45,7 +45,7 @@ use time::PreciseTime;
 use gpu::Gpu;
 
 const LIVE_DIFFICULTY: u64 = 0xffffffc000000000;
-const BETA_DIFFICULTY: u64 = 0xfffffc0000000000;
+const BETA_DIFFICULTY: u64 = 0xfffff00000000000;
 
 fn work_value(root: [u8; 32], work: [u8; 8]) -> u64 {
     let mut buf = [0u8; 8];