diff --git a/cpr/auth.cpp b/cpr/auth.cpp
index f41299d61..dfda86263 100644
--- a/cpr/auth.cpp
+++ b/cpr/auth.cpp
@@ -2,7 +2,6 @@
 #include "cpr/util.h"
 
 #include <string_view>
-#include <utility>
 
 namespace cpr {
 
@@ -13,18 +12,6 @@ Authentication::Authentication(std::string_view username, std::string_view passw
     auth_string_ += password;
 }
 
-Authentication::Authentication(Authentication&& old) noexcept : auth_string_{std::move(old.auth_string_)}, auth_mode_{old.auth_mode_} {
-    old.auth_string_.resize(old.auth_string_.capacity());
-}
-
-Authentication& Authentication::operator=(Authentication&& old) noexcept {
-    auth_mode_ = old.auth_mode_;
-    util::secureStringClear(auth_string_);
-    auth_string_ = std::move(old.auth_string_);
-    old.auth_string_.resize(old.auth_string_.capacity());
-    return *this;
-}
-
 Authentication::~Authentication() noexcept {
     util::secureStringClear(auth_string_);
 }
diff --git a/include/cpr/auth.h b/include/cpr/auth.h
index 55ea0fb84..c93ba64e2 100644
--- a/include/cpr/auth.h
+++ b/include/cpr/auth.h
@@ -12,10 +12,8 @@ class Authentication {
   public:
     Authentication(std::string_view username, std::string_view password, AuthMode auth_mode);
     Authentication(const Authentication& other) = default;
-    Authentication(Authentication&& old) noexcept;
     ~Authentication() noexcept;
 
-    Authentication& operator=(Authentication&& old) noexcept;
     Authentication& operator=(const Authentication& other) = default;
 
     const char* GetAuthString() const noexcept;