diff --git a/PoW.py b/PoW.py
index cb9c390..f136204 100644
--- a/PoW.py
+++ b/PoW.py
@@ -1,4 +1,4 @@
-import hashlib
+import hashlib, sys
 
 def check(data, proof, complexity=1, f=hashlib.sha256):
     zeros="0"*complexity
@@ -13,7 +13,7 @@ def check(data, proof, complexity=1, f=hashlib.sha256):
     return b>=complexity
 
 def mine(data, complexity=1, f=hashlib.sha256):
-    for a in range(0, 1000000000):
+    for a in range(0, sys.maxsize):
         if check(data, a, complexity, f):
             return a
             break