diff --git a/example/aliases/glide_computer_example.cpp b/example/aliases/glide_computer_example.cpp
index a6c30052..11d40e6e 100644
--- a/example/aliases/glide_computer_example.cpp
+++ b/example/aliases/glide_computer_example.cpp
@@ -75,7 +75,7 @@ auto get_waypoints()
   return waypoints;
 }
 
-template<std::ranges::forward_range R>
+template<std::ranges::input_range R>
   requires std::same_as<std::ranges::range_value_t<R>, glider>
 void print(const R& gliders)
 {
@@ -90,7 +90,7 @@ void print(const R& gliders)
   }
 }
 
-template<std::ranges::forward_range R>
+template<std::ranges::input_range R>
   requires std::same_as<std::ranges::range_value_t<R>, std::pair<const char*, weather>>
 void print(const R& conditions)
 {
@@ -105,7 +105,7 @@ void print(const R& conditions)
   }
 }
 
-template<std::ranges::forward_range R>
+template<std::ranges::input_range R>
   requires std::same_as<std::ranges::range_value_t<R>, waypoint>
 void print(const R& waypoints)
 {
diff --git a/example/literals/glide_computer_example.cpp b/example/literals/glide_computer_example.cpp
index 58f96c06..f3a2a832 100644
--- a/example/literals/glide_computer_example.cpp
+++ b/example/literals/glide_computer_example.cpp
@@ -75,7 +75,7 @@ auto get_waypoints()
   return waypoints;
 }
 
-template<std::ranges::forward_range R>
+template<std::ranges::input_range R>
   requires std::same_as<std::ranges::range_value_t<R>, glider>
 void print(const R& gliders)
 {
@@ -90,7 +90,7 @@ void print(const R& gliders)
   }
 }
 
-template<std::ranges::forward_range R>
+template<std::ranges::input_range R>
   requires std::same_as<std::ranges::range_value_t<R>, std::pair<const char*, weather>>
 void print(const R& conditions)
 {
@@ -105,7 +105,7 @@ void print(const R& conditions)
   }
 }
 
-template<std::ranges::forward_range R>
+template<std::ranges::input_range R>
   requires std::same_as<std::ranges::range_value_t<R>, waypoint>
 void print(const R& waypoints)
 {
diff --git a/example/references/glide_computer_example.cpp b/example/references/glide_computer_example.cpp
index 002d8172..701f04d2 100644
--- a/example/references/glide_computer_example.cpp
+++ b/example/references/glide_computer_example.cpp
@@ -75,7 +75,7 @@ auto get_waypoints()
   return waypoints;
 }
 
-template<std::ranges::forward_range R>
+template<std::ranges::input_range R>
   requires std::same_as<std::ranges::range_value_t<R>, glider>
 void print(const R& gliders)
 {
@@ -90,7 +90,7 @@ void print(const R& gliders)
   }
 }
 
-template<std::ranges::forward_range R>
+template<std::ranges::input_range R>
   requires std::same_as<std::ranges::range_value_t<R>, std::pair<const char*, weather>>
 void print(const R& conditions)
 {
@@ -105,7 +105,7 @@ void print(const R& conditions)
   }
 }
 
-template<std::ranges::forward_range R>
+template<std::ranges::input_range R>
   requires std::same_as<std::ranges::range_value_t<R>, waypoint>
 void print(const R& waypoints)
 {
diff --git a/src/core/include/units/bits/external/hacks.h b/src/core/include/units/bits/external/hacks.h
index 4219f768..f080d05c 100644
--- a/src/core/include/units/bits/external/hacks.h
+++ b/src/core/include/units/bits/external/hacks.h
@@ -138,7 +138,6 @@ using ::ranges::begin;
 using ::ranges::end;
 using ::ranges::distance;
 
-using ::ranges::forward_range;
 using ::ranges::input_range;
 using ::ranges::range_value_t;