diff --git a/challenges/hard/53_casual_attention/challenge.html b/challenges/hard/53_casual_attention/challenge.html
index 1558f9d6..4a7d9a90 100644
--- a/challenges/hard/53_casual_attention/challenge.html
+++ b/challenges/hard/53_casual_attention/challenge.html
@@ -249,7 +249,7 @@ <h2>Constraints</h2>
   <li>Matrix <code>Q</code>, <code>K</code>, and <code>V</code> are all of size <code>M×d</code></li>
   <li>1 &le; <code>M</code> &le; 10000</li>
   <li>1 &le; <code>d</code> &le; 128</li>
-  <li>All elements in <code>Q</code>, <code>K</code>, and <code>V</code> are sampled from<code>[-100.0, 100.0]</code></li>
+  <li>All elements in <code>Q</code>, <code>K</code>, and <code>V</code> are sampled from<code>[-1.0, 1.0]</code></li>
   <li>Data type for all matrices is <code>float32</code></li>
 
   <li>Performance is measured with <code>M</code> = 5,000</li>
diff --git a/challenges/hard/53_casual_attention/challenge.py b/challenges/hard/53_casual_attention/challenge.py
index af087d0f..2def7986 100644
--- a/challenges/hard/53_casual_attention/challenge.py
+++ b/challenges/hard/53_casual_attention/challenge.py
@@ -141,9 +141,9 @@ def generate_functional_test(self) -> List[Dict[str, Any]]:
     def generate_performance_test(self) -> Dict[str, Any]:
         M, d = 5000, 128
         return {
-            "Q": RandTensor((M, d), -100.0, 100.0),
-            "K": RandTensor((M, d), -100.0, 100.0),
-            "V": RandTensor((M, d), -100.0, 100.0),
+            "Q": RandTensor((M, d), -1.0, 1.0),
+            "K": RandTensor((M, d), -1.0, 1.0),
+            "V": RandTensor((M, d), -1.0, 1.0),
             "output": OutTensor((M, d)),
             "M": M,
             "d": d,