diff --git a/Userland/Utilities/CMakeLists.txt b/Userland/Utilities/CMakeLists.txt
index f8c02ba6a8..aa1b563489 100644
--- a/Userland/Utilities/CMakeLists.txt
+++ b/Userland/Utilities/CMakeLists.txt
@@ -120,6 +120,7 @@ target_link_libraries(js LibJS LibLine LibMain)
 link_with_unicode_data(js)
 target_link_libraries(keymap LibKeyboard LibMain)
 target_link_libraries(kill LibMain)
+target_link_libraries(killall LibCore LibMain)
 target_link_libraries(less LibMain)
 target_link_libraries(ln LibMain)
 target_link_libraries(logout LibMain)
diff --git a/Userland/Utilities/killall.cpp b/Userland/Utilities/killall.cpp
index 4d12099329..af9b5209b0 100644
--- a/Userland/Utilities/killall.cpp
+++ b/Userland/Utilities/killall.cpp
@@ -1,14 +1,16 @@
 /*
  * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
+ * Copyright (c) 2022, Zachary Penn <zack@sysdevs.org>
  *
  * SPDX-License-Identifier: BSD-2-Clause
  */
 
 #include <AK/String.h>
 #include <LibCore/ProcessStatisticsReader.h>
+#include <LibCore/System.h>
+#include <LibMain/Main.h>
 #include <ctype.h>
 #include <signal.h>
-#include <stdio.h>
 #include <stdlib.h>
 
 static void print_usage_and_exit()
@@ -17,7 +19,7 @@ static void print_usage_and_exit()
     exit(1);
 }
 
-static int kill_all(const String& process_name, const unsigned signum)
+static ErrorOr<int> kill_all(const String& process_name, const unsigned signum)
 {
     auto all_processes = Core::ProcessStatisticsReader::get_all();
     if (!all_processes.has_value())
@@ -25,46 +27,44 @@ static int kill_all(const String& process_name, const unsigned signum)
 
     for (auto& process : all_processes.value().processes) {
         if (process.name == process_name) {
-            int ret = kill(process.pid, signum);
-            if (ret < 0)
-                perror("kill");
+            TRY(Core::System::kill(process.pid, signum));
         }
     }
 
     return 0;
 }
 
-int main(int argc, char** argv)
+ErrorOr<int> serenity_main(Main::Arguments arguments)
 {
     unsigned signum = SIGTERM;
     int name_argi = 1;
 
-    if (argc != 2 && argc != 3)
+    if (arguments.argc != 2 && arguments.argc != 3)
         print_usage_and_exit();
 
-    if (argc == 3) {
+    if (arguments.argc == 3) {
         name_argi = 2;
 
-        if (argv[1][0] != '-')
+        if (arguments.argv[1][0] != '-')
             print_usage_and_exit();
 
         Optional<unsigned> number;
 
-        if (isalpha(argv[1][1])) {
-            int value = getsignalbyname(&argv[1][1]);
+        if (isalpha(arguments.argv[1][1])) {
+            int value = getsignalbyname(&arguments.argv[1][1]);
             if (value >= 0 && value < NSIG)
                 number = value;
         }
 
         if (!number.has_value())
-            number = String(&argv[1][1]).to_uint();
+            number = String(&arguments.argv[1][1]).to_uint();
 
         if (!number.has_value()) {
-            warnln("'{}' is not a valid signal name or number", &argv[1][1]);
+            warnln("'{}' is not a valid signal name or number", &arguments.argv[1][1]);
             return 2;
         }
         signum = number.value();
     }
 
-    return kill_all(argv[name_argi], signum);
+    return kill_all(arguments.strings[name_argi], signum);
 }