diff --git a/chapter10/ex03_simple_qt_app/CMakeLists.txt b/chapter10/ex03_simple_qt_app/CMakeLists.txt
index 87ec42c..4b7c9fa 100644
--- a/chapter10/ex03_simple_qt_app/CMakeLists.txt
+++ b/chapter10/ex03_simple_qt_app/CMakeLists.txt
@@ -29,7 +29,7 @@ endif()
 add_executable(ch10_ex03_simple_qt_app main.cpp)
 
 # Set C++ standard for the executable
-target_compile_features(ch10_ex03_simple_qt_app PRIVATE cxx_std_11)
+target_compile_features(ch10_ex03_simple_qt_app PRIVATE cxx_std_17)
 
 # Link QT components to the executable
 target_link_libraries(ch10_ex03_simple_qt_app Qt6::Core Qt6::Widgets)
\ No newline at end of file
diff --git a/chapter12/emulator-example/CMakeLists.txt b/chapter12/emulator-example/CMakeLists.txt
index c8c543d..c340962 100644
--- a/chapter12/emulator-example/CMakeLists.txt
+++ b/chapter12/emulator-example/CMakeLists.txt
@@ -13,7 +13,7 @@ project(
   ch12_emulator_example
   VERSION 1.0
   DESCRIPTION "A simple C++ project to demonstrate basic CMake usage"
-  LANGUAGES CXX)
+  LANGUAGES CXX C)
 
 # enable testing
 include(CTest)