diff --git a/src/CalcManager/pch.h b/src/CalcManager/pch.h
index 288bbc9..9c71ff3 100644
--- a/src/CalcManager/pch.h
+++ b/src/CalcManager/pch.h
@@ -21,6 +21,6 @@
 #include <vector>
 #include <winerror.h>
 #include <iostream>
-#include <math.h>
+#include <cmath>
 #include <random>
 #include <iomanip>
diff --git a/src/CalculatorUnitTests/pch.h b/src/CalculatorUnitTests/pch.h
index b4137b2..e24dd53 100644
--- a/src/CalculatorUnitTests/pch.h
+++ b/src/CalculatorUnitTests/pch.h
@@ -21,7 +21,7 @@
 #include <windows.h>
 #include <collection.h>
 #include <ppltasks.h>
-#include <assert.h>
+#include <cassert>
 #include <concrt.h>
 #include <string>
 #include <bitset>
diff --git a/src/GraphControl/pch.h b/src/GraphControl/pch.h
index 7906103..21f1608 100644
--- a/src/GraphControl/pch.h
+++ b/src/GraphControl/pch.h
@@ -17,7 +17,7 @@
 #include <concrt.h>
 #include <future>
 #include <memory>
-#include <assert.h>
+#include <cassert>
 #include <functional>
 #include <string>
 #include <sstream>