diff --git a/src/cpu/avx2.cpp b/src/cpu/avx2.cpp
index 46f285f..d48cb37 100644
--- a/src/cpu/avx2.cpp
+++ b/src/cpu/avx2.cpp
@@ -4,11 +4,11 @@
 
 using namespace std;
 
-void CPU::avx2::avx_sum(int *a, int *b)
+void cpu::avx2::avx_sum(int *a, int *b)
 {
 }
 
-void CPU::avx2::printAVX2Num(int *num)
+void cpu::avx2::printAVX2Num(int *num)
 {
     for (int i = 0; i < avx2::AVX2_INT_SIZE; i++)
     {
diff --git a/src/cpu/avx2.hpp b/src/cpu/avx2.hpp
index cf63283..33ad2dc 100644
--- a/src/cpu/avx2.hpp
+++ b/src/cpu/avx2.hpp
@@ -1,5 +1,5 @@
 #pragma once
-namespace CPU
+namespace cpu
 {
 class avx2
 {
diff --git a/src/cpu/demos/sse.cpp b/src/cpu/demos/sse.cpp
index 2a2f722..d5c3199 100644
--- a/src/cpu/demos/sse.cpp
+++ b/src/cpu/demos/sse.cpp
@@ -4,7 +4,7 @@
 #include "../naive.hpp"
 #include <sys/time.h>
 
-using namespace CPU;
+using namespace cpu;
 using namespace std;
 
 long int gettime(){
diff --git a/src/cpu/naive.cpp b/src/cpu/naive.cpp
index a9e1d3e..8730b38 100644
--- a/src/cpu/naive.cpp
+++ b/src/cpu/naive.cpp
@@ -2,7 +2,7 @@
 #include "types.hpp"
 #include <iostream>
 
-void CPU::Naive::sum_128_long(UInt *a,UInt *b){
+void cpu::Naive::sum_128_long(UInt *a,UInt *b){
     ULong a1 = ((ULong)a[0] << 32) | a[1];
     ULong a2 = ((ULong)a[2] << 32) | a[3];
     ULong b1 = ((ULong)b[0] << 32) | b[1];
diff --git a/src/cpu/naive.hpp b/src/cpu/naive.hpp
index 69f1d65..f5999af 100644
--- a/src/cpu/naive.hpp
+++ b/src/cpu/naive.hpp
@@ -1,7 +1,7 @@
 #pragma once
 
 #include "types.hpp"
-namespace CPU
+namespace cpu
 {
 class Naive
 {
diff --git a/src/cpu/sse.cpp b/src/cpu/sse.cpp
index 96673d3..522622d 100644
--- a/src/cpu/sse.cpp
+++ b/src/cpu/sse.cpp
@@ -2,7 +2,7 @@
 #include <iostream>
 
 //X86 Assembly to add two 128 bit numbers in the form of packed integers 32bit
-void CPU::SSE::paddw(UInt *a,UInt *b) {
+void cpu::SSE::paddw(UInt *a,UInt *b) {
     asm(
         "movdqa %0, %%xmm1\n"
         "paddw %1, %%xmm1\n"
@@ -14,7 +14,7 @@ void CPU::SSE::paddw(UInt *a,UInt *b) {
 
 
 //X86 Assembly to add two 128 bit numbers in the form of packed long 64bit
-void CPU::SSE::paddd(ULong *a,ULong *b) {
+void cpu::SSE::paddd(ULong *a,ULong *b) {
     asm(
         "movdqa %0, %%xmm1\n"
         "paddd %1, %%xmm1\n"
diff --git a/src/cpu/sse.hpp b/src/cpu/sse.hpp
index 8e218d7..237d9d4 100644
--- a/src/cpu/sse.hpp
+++ b/src/cpu/sse.hpp
@@ -3,7 +3,7 @@
 #include "types.hpp"
 
 
-namespace CPU
+namespace cpu
 {
 class SSE
 {
diff --git a/src/cpu/utils.hpp b/src/cpu/utils.hpp
index a595320..4c9590a 100644
--- a/src/cpu/utils.hpp
+++ b/src/cpu/utils.hpp
@@ -5,7 +5,7 @@
 
 using namespace std;
 
-namespace CPU
+namespace cpu
 {
 class Utils
 {