diff --git a/rust/diffie-hellman/src/lib.rs b/rust/diffie-hellman/src/lib.rs
index de7ff526..14a15169 100644
--- a/rust/diffie-hellman/src/lib.rs
+++ b/rust/diffie-hellman/src/lib.rs
@@ -12,5 +12,5 @@ pub fn public_key(p: u64, g: u64, a: u64) -> u64 {
 }
 
 pub fn secret(p: u64, b_pub: u64, a: u64) -> u64 {
-    return b_pub.pow(a.try_into().unwrap()) % p
+    b_pub.to_biguint().unwrap().modpow(&a.to_biguint().unwrap(), &p.to_biguint().unwrap()).try_into().unwrap()
 }
diff --git a/rust/diffie-hellman/tests/diffie-hellman.rs b/rust/diffie-hellman/tests/diffie-hellman.rs
index 17085a31..52b28a45 100644
--- a/rust/diffie-hellman/tests/diffie-hellman.rs
+++ b/rust/diffie-hellman/tests/diffie-hellman.rs
@@ -49,7 +49,6 @@ fn public_key_correct_big_numbers() {
 }
 
 #[test]
-#[ignore]
 fn secret_key_correct_big_numbers() {
     let p: u64 = 4_294_967_927;