diff --git a/meson.build b/meson.build
index 7ee3e2f..e47360b 100644
--- a/meson.build
+++ b/meson.build
@@ -4,10 +4,11 @@
     default_options: [
         'warning_level=3',
         'werror=true',
-        'cpp_std=c++17'
+        'cpp_std=c++20'
     ],
     license: 'Apache-2.0',
     version: '0.1',
+    meson_version: '>=0.57.0',
 )
 
 add_project_arguments(
@@ -26,9 +27,9 @@
 i2c = meson.get_compiler('cpp').find_library('i2c')
 sdbusplus = dependency('sdbusplus')
 systemd = dependency('systemd')
-systemd_system_unit_dir = systemd.get_pkgconfig_variable(
-    'systemdsystemunitdir',
-    define_variable: ['prefix', get_option('prefix')])
+systemd_system_unit_dir = systemd.get_variable(
+    pkgconfig: 'systemdsystemunitdir',
+    pkgconfig_define: ['prefix', get_option('prefix')])
 threads = dependency('threads')
 
 thresholds_a = static_library(