diff --git a/main.cpp b/main.cpp
index 9147e3f..88a5997 100644
--- a/main.cpp
+++ b/main.cpp
@@ -33,8 +33,13 @@ Input input_data(istream& in, bool prompt) {
     return inp;
 }
 
-int main() {
+int main(int argc, char* argv[]) {
     curl_global_init(CURL_GLOBAL_ALL);
+    if (argc > 1) {
+        for (size_t i = 0; i < argc; i++) {
+            cerr << "argv [" << i << "] = " << argv[i];
+        }
+    }
     auto in = input_data(cin, true);
     auto bins = make_histogram(in.numbers, in.bin_count);
     show_histogram_svg(bins);