diff --git a/src/main.m b/src/main.m
index 020bddb..d6e015b 100644
--- a/src/main.m
+++ b/src/main.m
@@ -43,7 +43,7 @@ void set_default_handler(NSString *url_scheme, NSString *handler) {
 }
 
 int main(int argc, const char *argv[]) {
-    const char *target = (argc == 1) ? '\0' : argv[1];
+    NSString *target = (argc > 1) ? [NSString stringWithUTF8String:argv[1]] : nil;
 
     @autoreleasepool {
         // Get all HTTP handlers
@@ -52,17 +52,17 @@ int main(int argc, const char *argv[]) {
         // Get current HTTP handler
         NSString *current_handler_name = get_current_http_handler();
 
-        if (target == '\0') {
+        if (target == nil) {
             // List all HTTP handlers, marking the current one with a star
             for (NSString *key in handlers) {
                 char *mark = [key caseInsensitiveCompare:current_handler_name] == NSOrderedSame ? "* " : "  ";
                 printf("%s%s\n", mark, [key UTF8String]);
             }
         } else {
-            NSString *target_handler_name = [NSString stringWithUTF8String:target];
+            NSString *target_handler_name = target;
 
             if ([target_handler_name caseInsensitiveCompare:current_handler_name] == NSOrderedSame) {
-              printf("%s is already set as the default HTTP handler\n", target);
+              printf("%s is already set as the default HTTP handler\n", [target UTF8String]);
             } else {
                 NSString *target_handler = handlers[target_handler_name];
 
@@ -71,7 +71,7 @@ int main(int argc, const char *argv[]) {
                     set_default_handler(@"http", target_handler);
                     set_default_handler(@"https", target_handler);
                 } else {
-                    printf("%s is not available as an HTTP handler\n", target);
+                    printf("%s is not available as an HTTP handler\n", [target UTF8String]);
 
                     return 1;
                 }