diff --git a/src/display.cpp b/src/display.cpp
index 1f3eba8..dcf6d3c 100644
--- a/src/display.cpp
+++ b/src/display.cpp
@@ -122,9 +122,9 @@ void drawDots(const Color& bottom, const Color& middleBottom, const Color& middl
 
 void drawMillisDeci(const unsigned long millisTotal, const Color& color) {
   const auto secondsTotal = millisTotal / 1000;
-  const auto minutes = (int)secondsTotal / 60;
-  const auto seconds = (int)secondsTotal % 60;
-  const auto deci = (int)millisTotal / 100 % 10;
+  const auto minutes = static_cast<int>(secondsTotal) / 60;
+  const auto seconds = static_cast<int>(secondsTotal) % 60;
+  const auto deci = static_cast<int>(millisTotal) / 100 % 10;
 
   pixels.clear();
   if (minutes > 0) {
@@ -142,9 +142,9 @@ void drawMillisDeci(const unsigned long millisTotal, const Color& color) {
 }
 
 void drawMillis(const unsigned long millisTotal, const Color& color) {
-  const auto secondsTotal = (unsigned long)ceil(millisTotal / 1000.0);
-  const auto minutes = (int)secondsTotal / 60;
-  const auto seconds = (int)secondsTotal % 60;
+  const auto secondsTotal = static_cast<unsigned long>(ceil(millisTotal / 1000.0));
+  const auto minutes = static_cast<int>(secondsTotal) / 60;
+  const auto seconds = static_cast<int>(secondsTotal) % 60;
 
   pixels.clear();
   if (minutes > 0) {