diff --git a/archive_exception.cpp b/archive_exception.cpp
index eae9da7..4955d32 100644
--- a/archive_exception.cpp
+++ b/archive_exception.cpp
@@ -30,13 +30,13 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 namespace ns_archive {
 
-archive_exception::archive_exception(const std::string& what) :
+archive_exception::archive_exception(const std::string& what) noexcept :
   _what(what)
 {
   //
 }
 
-const char* archive_exception::what()
+const char* archive_exception::what() const noexcept
 {
   return _what.c_str();
 }
diff --git a/archive_exception.hpp b/archive_exception.hpp
index 082d4f0..1fcaa50 100644
--- a/archive_exception.hpp
+++ b/archive_exception.hpp
@@ -37,9 +37,9 @@ namespace ns_archive {
 class archive_exception : public std::exception
 {
 public:
-  archive_exception(const std::string& what);
+  archive_exception(const std::string& what) noexcept;
 
-  const char* what();
+  const char* what() const noexcept override;
 
 private:
   std::string _what;