diff --git a/README.md b/README.md
index 6aef1dd..0a8f7f0 100644
--- a/README.md
+++ b/README.md
@@ -58,7 +58,7 @@ Bill (Heath) Gates 65 3.3
  * Conversions can be chained if invalid
  * Fast
 
-# Instalation
+# Installation
 
 ```
 $ git clone https://github.com/red0124/ssp
diff --git a/include/ss/parser.hpp b/include/ss/parser.hpp
index 1dd978d..20385d5 100644
--- a/include/ss/parser.hpp
+++ b/include/ss/parser.hpp
@@ -5,7 +5,7 @@
 #include "restrictions.hpp"
 #include <cstring>
 #include <optional>
-#include <stdlib.h>
+#include <cstdlib>
 #include <string>
 #include <vector>
 
diff --git a/include/ss/type_traits.hpp b/include/ss/type_traits.hpp
index 11a2dc7..75683e6 100644
--- a/include/ss/type_traits.hpp
+++ b/include/ss/type_traits.hpp
@@ -57,14 +57,6 @@ using head_t = typename left_of_impl<0, Ts...>::type;
 // tup tail/last
 ////////////////
 
-template <size_t N, typename T, typename... Ts>
-struct right_of_impl;
-
-template <size_t N, typename T, typename... Ts>
-struct right_of_impl {
-    using type = typename right_of_impl<N - 1, Ts...>::type;
-};
-
 template <typename T, typename... Ts>
 struct right_of_impl<0, T, Ts...> {
     using type = std::tuple<T, Ts...>;
@@ -230,9 +222,6 @@ using filter_not_t = typename filter_not<Trait, Ts...>::type;
 // count
 ////////////////
 
-template <template <typename...> class Trait, typename T, typename... Ts>
-struct count;
-
 template <template <typename...> class Trait, typename T, typename... Ts>
 struct count {
     static constexpr size_t size =
@@ -248,9 +237,6 @@ struct count<Trait, T> {
 // count not
 ////////////////
 
-template <template <typename...> class Trait, typename T, typename... Ts>
-struct count;
-
 template <template <typename...> class Trait, typename T, typename... Ts>
 struct count_not {
     static constexpr size_t size =