diff --git a/Chaos/Cipher/Block/Encryptor.hpp b/Chaos/Cipher/Block/Encryptor.hpp
index 13626dc..8150c91 100644
--- a/Chaos/Cipher/Block/Encryptor.hpp
+++ b/Chaos/Cipher/Block/Encryptor.hpp
@@ -18,7 +18,9 @@ concept Encryptor = requires(const T constEncryptor,
     typename T::Key;
     requires std::constructible_from<T, typename T::Key>;
     requires std::unsigned_integral<std::remove_cvref_t<decltype(T::BlockSize)>>;
+    typename std::integral_constant<decltype(T::BlockSize), T::BlockSize>;
     requires std::unsigned_integral<std::remove_cvref_t<decltype(T::KeySize)>>;
+    typename std::integral_constant<decltype(T::KeySize), T::KeySize>;
     constEncryptor.EncryptBlock(outBegin, outEnd, inBegin, inEnd);
     { constEncryptor.EncryptBlock(block) } -> std::same_as<typename T::Block>;
     { constEncryptor.GetBlockSize() } -> std::unsigned_integral;