diff --git a/CMakeLists.txt b/CMakeLists.txt
index 475e294..152d927 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -4,6 +4,7 @@ project(lily_png)
 set(CMAKE_CXX_STANDARD 23)
 
 add_subdirectory(file_reader)
+target_include_directories(file_read INTERFACE "file_reader")
 find_package(ZLIB)
 
 add_library(lily_png STATIC src/lily_png.cpp
@@ -13,5 +14,5 @@ add_library(lily_png STATIC src/lily_png.cpp
         src/utils.h
         src/filter.cpp
         src/filter.h)
-target_link_libraries(lily_png file_read ZLIB::ZLIB)
+target_link_libraries(lily_png PRIVATE file_read ZLIB::ZLIB)
 
diff --git a/file_reader b/file_reader
index f8f0ef3..ec3d796 160000
--- a/file_reader
+++ b/file_reader
@@ -1 +1 @@
-Subproject commit f8f0ef364ee87473300ff2f51e192465843e0a8c
+Subproject commit ec3d79677455c47c31f3244a763d53933da84eb8
diff --git a/src/filter.cpp b/src/filter.cpp
index e76e8d2..4a4089e 100644
--- a/src/filter.cpp
+++ b/src/filter.cpp
@@ -43,7 +43,7 @@ void filter_scanline(unsigned char *scanline, unsigned char *previous_scanline,
 	}
 }
 
-void filter(buffer_unsigned &data, buffer_unsigned &dest ,metadata &meta)
+void filter(buffer<unsigned char> &data, buffer<unsigned char> &dest ,metadata &meta)
 {
 	unsigned long index = 0;
 	unsigned long index_dest = 0;
diff --git a/src/filter.h b/src/filter.h
index daf128c..3b66ac4 100644
--- a/src/filter.h
+++ b/src/filter.h
@@ -2,5 +2,5 @@
 #include "utils.h"
 
 void filter_scanline(unsigned char *scanline, unsigned char *previous_scanline, unsigned char *dest, metadata &meta, unsigned char filter_type);
-void filter(buffer_unsigned &data, buffer_unsigned &dest ,metadata &meta);
+void filter(buffer<unsigned char> &data, buffer<unsigned char> &dest ,metadata &meta);
 
diff --git a/src/lily_png.cpp b/src/lily_png.cpp
index fae4683..6d59601 100644
--- a/src/lily_png.cpp
+++ b/src/lily_png.cpp
@@ -3,7 +3,7 @@
 std::vector<color> palette;
 bool palette_found = false;
 
-static void read_raw_data(const std::string &file_path, buffer_unsigned &data, metadata &meta)
+static void read_raw_data(const std::string &file_path, buffer<unsigned char> &data, metadata &meta)
 {
 	std::println("Zlib version is {}", zlibVersion());
 	unsigned char magic[9] = {137, 80, 78, 71, 13, 10, 26, 10};
@@ -15,10 +15,10 @@ static void read_raw_data(const std::string &file_path, buffer_unsigned &data, m
 		std::println("File is not a png!");
 		return ;
 	}
-	buffer_unsigned raw_dat{};
+	buffer<unsigned char> raw_dat{};
 	while (true)
 	{
-		std::tuple<unsigned int, buffer> chunk_header;
+		std::tuple<unsigned int, buffer<char>> chunk_header;
 		std::get<1>(chunk_header).size = 4;
 		auto ret = reader.read_from_tuple(chunk_header);
 		if (ret.second == READ_FILE_ENDED || ret.second == READ_INCOMPLETE)
@@ -29,9 +29,9 @@ static void read_raw_data(const std::string &file_path, buffer_unsigned &data, m
 		unsigned int size = std::get<0>(chunk_header);
 		//std::println("Chunk type {} Size {}", std::get<1>(chunk_header).data, std::get<0>(chunk_header));
 
-		buffer_unsigned raw_data{};
+		buffer<unsigned char> raw_data{};
 		raw_data.size = std::get<0>(chunk_header);
-		std::tuple<buffer, unsigned> dat;
+		std::tuple<buffer<char>, unsigned> dat;
 		std::get<0>(dat).size = std::get<0>(chunk_header);
 		ret = reader.read_from_tuple(dat);
 		if (ret.second == READ_FILE_ENDED || ret.second == READ_INCOMPLETE)
@@ -100,7 +100,7 @@ static void apply_palette_scanline(unsigned char *scanline, unsigned char *dest,
 	}
 }
 
-static void apply_palette(buffer_unsigned &data, buffer_unsigned &dest, metadata &meta)
+static void apply_palette(buffer<unsigned char> &data, buffer<unsigned char> &dest, metadata &meta)
 {
 	unsigned long index = 0;
 	unsigned long index_dest = 0;
@@ -120,14 +120,14 @@ static void apply_palette(buffer_unsigned &data, buffer_unsigned &dest, metadata
 	}
 }
 
-void read_png(const std::string &file_path, buffer_unsigned &data)
+void read_png(const std::string &file_path, buffer<unsigned char> &data)
 {
-	buffer_unsigned tmp_data{};
+	buffer<unsigned char> tmp_data{};
 	metadata meta{0};
 	read_raw_data(file_path, tmp_data, meta);
 	if (palette_found == true)
 	{
-		buffer_unsigned dest_palette{};
+		buffer<unsigned char> dest_palette{};
 		apply_palette(tmp_data, dest_palette, meta);
 		tmp_data = dest_palette;
 	}
diff --git a/src/lily_png.h b/src/lily_png.h
index f260cc6..ea316f9 100644
--- a/src/lily_png.h
+++ b/src/lily_png.h
@@ -2,7 +2,6 @@
 
 #include "../file_reader/src/file_read.h"
 #include <string>
-#include <iostream>
 #include <vector>
 #include "utils.h"
 #include "filter.h"
@@ -15,4 +14,4 @@ struct color
 	unsigned char b = 0;
 };
 
-void read_png(const std::string &file_path, buffer_unsigned &data);
\ No newline at end of file
+void read_png(const std::string &file_path, buffer<unsigned char> &data);
\ No newline at end of file
diff --git a/src/metadata.cpp b/src/metadata.cpp
index 2978ffe..ca4007c 100644
--- a/src/metadata.cpp
+++ b/src/metadata.cpp
@@ -1,7 +1,7 @@
 #include "metadata.h"
 
 
-metadata parse_metadata(buffer &data)
+metadata parse_metadata(buffer<char> &data)
 {
 	std::tuple<unsigned int, unsigned int, char, char, char, char, char> meta;
 	constexpr std::size_t size = std::tuple_size_v<decltype(meta)>;
diff --git a/src/metadata.h b/src/metadata.h
index 0ca3b48..01f77df 100644
--- a/src/metadata.h
+++ b/src/metadata.h
@@ -12,4 +12,4 @@ struct metadata
 	char interface;
 };
 
-metadata parse_metadata(buffer &data);
+metadata parse_metadata(buffer<char> &data);