diff --git a/main.cpp b/main.cpp
index eaf503d..01bd052 100644
--- a/main.cpp
+++ b/main.cpp
@@ -10,7 +10,7 @@ hello()
 }
 
 int
-main(int argc, char** argv)
+main(int argc, const char* argv[])
 {
     std::thread t{hello};
     t.join();