diff --git a/std/algorithm.hpp b/std/algorithm.hpp
index 7ec7845..7fd1936 100644
--- a/std/algorithm.hpp
+++ b/std/algorithm.hpp
@@ -7,3 +7,4 @@ using std::min;
 using std::max;
 using std::transform;
 using std::equal_range;
+using std::replace;
diff --git a/std/fstream.hpp b/std/fstream.hpp
new file mode 100644
index 0000000..b244031
--- /dev/null
+++ b/std/fstream.hpp
@@ -0,0 +1,4 @@
+#pragma once
+
+#include <fstream>
+using std::ifstream;
diff --git a/std/string.hpp b/std/string.hpp
index 8fe3c8b..7c4ea0a 100644
--- a/std/string.hpp
+++ b/std/string.hpp
@@ -3,3 +3,4 @@
 #include <string>
 
 using std::string;
+using std::getline;