diff --git a/test cases/frameworks/5 protocol buffers/meson.build b/test cases/frameworks/5 protocol buffers/meson.build
index 9a4154b..f9e677c 100644
--- a/test cases/frameworks/5 protocol buffers/meson.build
+++ b/test cases/frameworks/5 protocol buffers/meson.build
@@ -1,4 +1,4 @@
-project('protocol buffer test', 'cpp', default_options: ['cpp_std=c++14'])
+project('protocol buffer test', 'cpp', default_options: ['cpp_std=c++17'])
 
 protoc = find_program('protoc', required : false)
 dep = dependency('protobuf', required : false)