diff --git a/src/dbus_utility.cpp b/src/dbus_utility.cpp
index cdfd13c..54eb0aa 100644
--- a/src/dbus_utility.cpp
+++ b/src/dbus_utility.cpp
@@ -91,7 +91,7 @@
 void checkDbusPathExists(const std::string& path,
                          std::function<void(bool)>&& callback)
 {
-    crow::connections::systemBus->async_method_call(
+    dbus::utility::async_method_call(
         [callback = std::move(callback)](const boost::system::error_code& ec,
                                          const MapperGetObject& objectNames) {
             callback(!ec && !objectNames.empty());
@@ -107,7 +107,7 @@
                 std::function<void(const boost::system::error_code&,
                                    const MapperGetSubTreeResponse&)>&& callback)
 {
-    crow::connections::systemBus->async_method_call(
+    dbus::utility::async_method_call(
         [callback{std::move(callback)}](
             const boost::system::error_code& ec,
             const MapperGetSubTreeResponse& subtree) { callback(ec, subtree); },
@@ -123,7 +123,7 @@
     std::function<void(const boost::system::error_code&,
                        const MapperGetSubTreePathsResponse&)>&& callback)
 {
-    crow::connections::systemBus->async_method_call(
+    dbus::utility::async_method_call(
         [callback{std::move(callback)}](
             const boost::system::error_code& ec,
             const MapperGetSubTreePathsResponse& subtreePaths) {
@@ -142,7 +142,7 @@
     std::function<void(const boost::system::error_code&,
                        const MapperGetSubTreeResponse&)>&& callback)
 {
-    crow::connections::systemBus->async_method_call(
+    dbus::utility::async_method_call(
         [callback{std::move(callback)}](
             const boost::system::error_code& ec,
             const MapperGetSubTreeResponse& subtree) { callback(ec, subtree); },
@@ -159,7 +159,7 @@
     std::function<void(const boost::system::error_code&,
                        const MapperGetSubTreePathsResponse&)>&& callback)
 {
-    crow::connections::systemBus->async_method_call(
+    dbus::utility::async_method_call(
         [callback{std::move(callback)}](
             const boost::system::error_code& ec,
             const MapperGetSubTreePathsResponse& subtreePaths) {
@@ -179,7 +179,7 @@
     std::function<void(const boost::system::error_code&,
                        const MapperGetSubTreeResponse&)>&& callback)
 {
-    crow::connections::systemBus->async_method_call(
+    dbus::utility::async_method_call(
         [callback{std::move(callback)}](
             const boost::system::error_code& ec,
             const MapperGetSubTreeResponse& subtree) { callback(ec, subtree); },
@@ -197,7 +197,7 @@
     std::function<void(const boost::system::error_code&,
                        const MapperGetSubTreePathsResponse&)>&& callback)
 {
-    crow::connections::systemBus->async_method_call(
+    dbus::utility::async_method_call(
         [callback{std::move(callback)}](
             const boost::system::error_code& ec,
             const MapperGetSubTreePathsResponse& subtreePaths) {
@@ -214,7 +214,7 @@
                    std::function<void(const boost::system::error_code&,
                                       const MapperGetObject&)>&& callback)
 {
-    crow::connections::systemBus->async_method_call(
+    dbus::utility::async_method_call(
         [callback{std::move(callback)}](const boost::system::error_code& ec,
                                         const MapperGetObject& object) {
             callback(ec, object);
@@ -239,7 +239,7 @@
                        std::function<void(const boost::system::error_code&,
                                           const ManagedObjectType&)>&& callback)
 {
-    crow::connections::systemBus->async_method_call(
+    dbus::utility::async_method_call(
         [callback{std::move(callback)}](const boost::system::error_code& ec,
                                         const ManagedObjectType& objects) {
             callback(ec, objects);