diff --git a/src/renderer/core/renderer/renderer.cpp b/src/renderer/core/renderer/renderer.cpp
index 620c924..de411bd 100644
--- a/src/renderer/core/renderer/renderer.cpp
+++ b/src/renderer/core/renderer/renderer.cpp
@@ -9,7 +9,7 @@
 #endif
 
 std::chrono::duration<double> delta_time = {};
-std::chrono::time_point<std::chrono::system_clock> last_time = {};
+decltype(std::chrono::high_resolution_clock::now()) last_time = {};
 
 void renderer::tick() {
 }
@@ -54,7 +54,7 @@ void aorii::destroy_renderer() {
 }
 
 void aorii::update() {
-    const auto current_time = std::chrono::high_resolution_clock::now();
+    const auto& current_time = std::chrono::high_resolution_clock::now();
     delta_time = current_time - last_time;
     last_time = current_time;