diff --git a/meson.build b/meson.build
index 7c6e889c4b5ef8f2999bd0e19d1a3ffccb62ef19..f6a472d3acd4b0983273b293ca36e2e7affd0660 100644
--- a/meson.build
+++ b/meson.build
@@ -1,6 +1,6 @@
 project('mfix-parser', 'cpp',
         version : '0.1',
-        default_options : ['warning_level=3', 'cpp_std=c++17'])
+        default_options : ['warning_level=3', 'cpp_std=c++2a'])
 
 tao_inc = include_directories('subprojects/PEGTL/include')
 catch2_inc = include_directories('subprojects/Catch2/single_include')