--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -25,7 +25,7 @@
 #
 # Makefile for Jack Keyboard
 #
-cmake_minimum_required(VERSION 2.8)
+cmake_minimum_required(VERSION 3.10)
 
 set(CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/cmake/")
 set(VERSION "2.7.2")
@@ -36,7 +36,7 @@
 
 project(jack-keyboard)
 
-add_executable(jack-keyboard src/jack-keyboard src/pianokeyboard)
+add_executable(jack-keyboard src/jack-keyboard.c src/pianokeyboard.c)
 
 find_package(GTK2 2.2 REQUIRED gtk)
 include_directories(${GTK2_INCLUDE_DIRS})