diff --git a/include/gsl/span b/include/gsl/span
index 3022e0d..a649cea 100644
--- a/include/gsl/span
+++ b/include/gsl/span
@@ -100,7 +100,7 @@ namespace details
 
     template <std::size_t From, std::size_t To>
     struct is_allowed_extent_conversion
-        : std::integral_constant<bool, From == To || To == gsl::dynamic_extent>
+        : std::integral_constant<bool, From == To || To == dynamic_extent>
     {
     };
 
@@ -421,24 +421,24 @@ public:
     constexpr span() noexcept : storage_(nullptr, details::extent_type<0>())
     {}
 
-    template <std::size_t MyExtent = Extent, std::enable_if_t<MyExtent != gsl::dynamic_extent, int> = 0>
+    template <std::size_t MyExtent = Extent, std::enable_if_t<MyExtent != dynamic_extent, int> = 0>
     constexpr explicit span(pointer ptr, size_type count) noexcept : storage_(ptr, count)
     {
         Expects(count == Extent);
     }
 
-    template <std::size_t MyExtent = Extent, std::enable_if_t<MyExtent == gsl::dynamic_extent, int> = 0>
+    template <std::size_t MyExtent = Extent, std::enable_if_t<MyExtent == dynamic_extent, int> = 0>
     constexpr span(pointer ptr, size_type count) noexcept : storage_(ptr, count)
     {}
 
-    template <std::size_t MyExtent = Extent, std::enable_if_t<MyExtent != gsl::dynamic_extent, int> = 0>
+    template <std::size_t MyExtent = Extent, std::enable_if_t<MyExtent != dynamic_extent, int> = 0>
     constexpr explicit span(pointer firstElem, pointer lastElem) noexcept
         : storage_(firstElem, static_cast<std::size_t>(lastElem - firstElem))
     {
         Expects(lastElem - firstElem == static_cast<difference_type>(Extent));
     }
 
-    template <std::size_t MyExtent = Extent, std::enable_if_t<MyExtent == gsl::dynamic_extent, int> = 0>
+    template <std::size_t MyExtent = Extent, std::enable_if_t<MyExtent == dynamic_extent, int> = 0>
     constexpr span(pointer firstElem, pointer lastElem) noexcept
         : storage_(firstElem, static_cast<std::size_t>(lastElem - firstElem))
     {}
diff --git a/include/gsl/string_span b/include/gsl/string_span
index 092c8d8..ba125b7 100644
--- a/include/gsl/string_span
+++ b/include/gsl/string_span
@@ -471,7 +471,7 @@ bool operator==(const T& one, const gsl::basic_string_span<CharT, Extent>& other
 }
 
 // operator !=
-template <typename CharT, std::size_t Extent = gsl::dynamic_extent, typename T,
+template <typename CharT, std::size_t Extent = dynamic_extent, typename T,
           typename = std::enable_if_t<std::is_convertible<
               T, gsl::basic_string_span<std::add_const_t<CharT>, Extent>>::value>>
 bool operator!=(gsl::basic_string_span<CharT, Extent> one, const T& other)
@@ -480,7 +480,7 @@ bool operator!=(gsl::basic_string_span<CharT, Extent> one, const T& other)
 }
 
 template <
-    typename CharT, std::size_t Extent = gsl::dynamic_extent, typename T,
+    typename CharT, std::size_t Extent = dynamic_extent, typename T,
     typename = std::enable_if_t<
         std::is_convertible<T, gsl::basic_string_span<std::add_const_t<CharT>, Extent>>::value &&
         !gsl::details::is_basic_string_span<T>::value>>
@@ -490,7 +490,7 @@ bool operator!=(const T& one, gsl::basic_string_span<CharT, Extent> other)
 }
 
 // operator<
-template <typename CharT, std::size_t Extent = gsl::dynamic_extent, typename T,
+template <typename CharT, std::size_t Extent = dynamic_extent, typename T,
           typename = std::enable_if_t<std::is_convertible<
               T, gsl::basic_string_span<std::add_const_t<CharT>, Extent>>::value>>
 bool operator<(gsl::basic_string_span<CharT, Extent> one, const T& other)
@@ -500,7 +500,7 @@ bool operator<(gsl::basic_string_span<CharT, Extent> one, const T& other)
 }
 
 template <
-    typename CharT, std::size_t Extent = gsl::dynamic_extent, typename T,
+    typename CharT, std::size_t Extent = dynamic_extent, typename T,
     typename = std::enable_if_t<
         std::is_convertible<T, gsl::basic_string_span<std::add_const_t<CharT>, Extent>>::value &&
         !gsl::details::is_basic_string_span<T>::value>>
@@ -516,7 +516,7 @@ bool operator<(const T& one, gsl::basic_string_span<CharT, Extent> other)
 // so the cases below are already covered by the previous operators
 
 template <
-    typename CharT, std::size_t Extent = gsl::dynamic_extent, typename T,
+    typename CharT, std::size_t Extent = dynamic_extent, typename T,
     typename DataType = typename T::value_type,
     typename = std::enable_if_t<
         !gsl::details::is_span<T>::value && !gsl::details::is_basic_string_span<T>::value &&
@@ -530,7 +530,7 @@ bool operator<(gsl::basic_string_span<CharT, Extent> one, const T& other)
 }
 
 template <
-    typename CharT, std::size_t Extent = gsl::dynamic_extent, typename T,
+    typename CharT, std::size_t Extent = dynamic_extent, typename T,
     typename DataType = typename T::value_type,
     typename = std::enable_if_t<
         !gsl::details::is_span<T>::value && !gsl::details::is_basic_string_span<T>::value &&
@@ -545,7 +545,7 @@ bool operator<(const T& one, gsl::basic_string_span<CharT, Extent> other)
 #endif
 
 // operator <=
-template <typename CharT, std::size_t Extent = gsl::dynamic_extent, typename T,
+template <typename CharT, std::size_t Extent = dynamic_extent, typename T,
           typename = std::enable_if_t<std::is_convertible<
               T, gsl::basic_string_span<std::add_const_t<CharT>, Extent>>::value>>
 bool operator<=(gsl::basic_string_span<CharT, Extent> one, const T& other)
@@ -554,7 +554,7 @@ bool operator<=(gsl::basic_string_span<CharT, Extent> one, const T& other)
 }
 
 template <
-    typename CharT, std::size_t Extent = gsl::dynamic_extent, typename T,
+    typename CharT, std::size_t Extent = dynamic_extent, typename T,
     typename = std::enable_if_t<
         std::is_convertible<T, gsl::basic_string_span<std::add_const_t<CharT>, Extent>>::value &&
         !gsl::details::is_basic_string_span<T>::value>>
@@ -569,7 +569,7 @@ bool operator<=(const T& one, gsl::basic_string_span<CharT, Extent> other)
 // so the cases below are already covered by the previous operators
 
 template <
-    typename CharT, std::size_t Extent = gsl::dynamic_extent, typename T,
+    typename CharT, std::size_t Extent = dynamic_extent, typename T,
     typename DataType = typename T::value_type,
     typename = std::enable_if_t<
         !gsl::details::is_span<T>::value && !gsl::details::is_basic_string_span<T>::value &&
@@ -582,7 +582,7 @@ bool operator<=(gsl::basic_string_span<CharT, Extent> one, const T& other)
 }
 
 template <
-    typename CharT, std::size_t Extent = gsl::dynamic_extent, typename T,
+    typename CharT, std::size_t Extent = dynamic_extent, typename T,
     typename DataType = typename T::value_type,
     typename = std::enable_if_t<
         !gsl::details::is_span<T>::value && !gsl::details::is_basic_string_span<T>::value &&
@@ -596,7 +596,7 @@ bool operator<=(const T& one, gsl::basic_string_span<CharT, Extent> other)
 #endif
 
 // operator>
-template <typename CharT, std::size_t Extent = gsl::dynamic_extent, typename T,
+template <typename CharT, std::size_t Extent = dynamic_extent, typename T,
           typename = std::enable_if_t<std::is_convertible<
               T, gsl::basic_string_span<std::add_const_t<CharT>, Extent>>::value>>
 bool operator>(gsl::basic_string_span<CharT, Extent> one, const T& other)
@@ -605,7 +605,7 @@ bool operator>(gsl::basic_string_span<CharT, Extent> one, const T& other)
 }
 
 template <
-    typename CharT, std::size_t Extent = gsl::dynamic_extent, typename T,
+    typename CharT, std::size_t Extent = dynamic_extent, typename T,
     typename = std::enable_if_t<
         std::is_convertible<T, gsl::basic_string_span<std::add_const_t<CharT>, Extent>>::value &&
         !gsl::details::is_basic_string_span<T>::value>>
@@ -620,7 +620,7 @@ bool operator>(const T& one, gsl::basic_string_span<CharT, Extent> other)
 // so the cases below are already covered by the previous operators
 
 template <
-    typename CharT, std::size_t Extent = gsl::dynamic_extent, typename T,
+    typename CharT, std::size_t Extent = dynamic_extent, typename T,
     typename DataType = typename T::value_type,
     typename = std::enable_if_t<
         !gsl::details::is_span<T>::value && !gsl::details::is_basic_string_span<T>::value &&
@@ -633,7 +633,7 @@ bool operator>(gsl::basic_string_span<CharT, Extent> one, const T& other)
 }
 
 template <
-    typename CharT, std::size_t Extent = gsl::dynamic_extent, typename T,
+    typename CharT, std::size_t Extent = dynamic_extent, typename T,
     typename DataType = typename T::value_type,
     typename = std::enable_if_t<
         !gsl::details::is_span<T>::value && !gsl::details::is_basic_string_span<T>::value &&
@@ -647,7 +647,7 @@ bool operator>(const T& one, gsl::basic_string_span<CharT, Extent> other)
 #endif
 
 // operator >=
-template <typename CharT, std::size_t Extent = gsl::dynamic_extent, typename T,
+template <typename CharT, std::size_t Extent = dynamic_extent, typename T,
           typename = std::enable_if_t<std::is_convertible<
               T, gsl::basic_string_span<std::add_const_t<CharT>, Extent>>::value>>
 bool operator>=(gsl::basic_string_span<CharT, Extent> one, const T& other)
@@ -656,7 +656,7 @@ bool operator>=(gsl::basic_string_span<CharT, Extent> one, const T& other)
 }
 
 template <
-    typename CharT, std::size_t Extent = gsl::dynamic_extent, typename T,
+    typename CharT, std::size_t Extent = dynamic_extent, typename T,
     typename = std::enable_if_t<
         std::is_convertible<T, gsl::basic_string_span<std::add_const_t<CharT>, Extent>>::value &&
         !gsl::details::is_basic_string_span<T>::value>>
@@ -671,7 +671,7 @@ bool operator>=(const T& one, gsl::basic_string_span<CharT, Extent> other)
 // so the cases below are already covered by the previous operators
 
 template <
-    typename CharT, std::size_t Extent = gsl::dynamic_extent, typename T,
+    typename CharT, std::size_t Extent = dynamic_extent, typename T,
     typename DataType = typename T::value_type,
     typename = std::enable_if_t<
         !gsl::details::is_span<T>::value && !gsl::details::is_basic_string_span<T>::value &&
@@ -684,7 +684,7 @@ bool operator>=(gsl::basic_string_span<CharT, Extent> one, const T& other)
 }
 
 template <
-    typename CharT, std::size_t Extent = gsl::dynamic_extent, typename T,
+    typename CharT, std::size_t Extent = dynamic_extent, typename T,
     typename DataType = typename T::value_type,
     typename = std::enable_if_t<
         !gsl::details::is_span<T>::value && !gsl::details::is_basic_string_span<T>::value &&