diff --git a/src/project_euler_python/problems_001_050/Problem009.py b/src/project_euler_python/problems_001_050/Problem009.py
index 4b12964..4ebb1de 100644
--- a/src/project_euler_python/problems_001_050/Problem009.py
+++ b/src/project_euler_python/problems_001_050/Problem009.py
@@ -24,9 +24,9 @@ def compute():
     Find the product abc.
     """
 
-    upper_limit = 1000
-    for a in range(1, upper_limit + 1):
-        for b in range(a + 1, upper_limit + 1):
+    upper_limit = 1000 + 1
+    for a in range(1, upper_limit):
+        for b in range(a + 1, upper_limit):
             c = upper_limit - a - b
             if a * a + b * b == c * c:
                 # It is now implied that b < c, because we have a > 0