diff --git a/protocols/USDe/contracts/lib/math/PRBMathSD59x18.sol b/protocols/USDe/contracts/lib/math/PRBMathSD59x18.sol
index c806f89..6e20820 100644
--- a/protocols/USDe/contracts/lib/math/PRBMathSD59x18.sol
+++ b/protocols/USDe/contracts/lib/math/PRBMathSD59x18.sol
@@ -171,7 +171,7 @@ library PRBMathSD59x18 {
 
   /// @notice Calculates the binary exponent of x using the binary fraction method.
   ///
-  /// @dev See https://ethereum.stackexchange.com/q/79903/24693.
+  /// @dev See https://ethereum.stackexchange.com/questions/79903/exponential-function-with-fractional-numbers.
   ///
   /// Requirements:
   /// - x must be 192 or less.