diff --git a/source/CMakeLists.txt b/source/CMakeLists.txt
index 13840d1..e4e1133 100644
--- a/source/CMakeLists.txt
+++ b/source/CMakeLists.txt
@@ -10,7 +10,10 @@ add_definitions(${GTK_CFLAGS_OTHER})
 find_package(ICU REQUIRED COMPONENTS uc dt in io)
 
 #set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -pedantic -Wall -Wextra -Werror -Wmissing-declarations -fdiagnostics-color=always -std=c++2a")
-set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -pedantic -Wall -Wextra -Werror -Wmissing-declarations -fdiagnostics-color=always")
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -pedantic -Wall -Wextra -Werror -Wmissing-declarations -fdiagnostics-color=always \
+	-O2 -pipe -fno-plt -fexceptions \
+        -Wp,-D_FORTIFY_SOURCE=2 -Wformat -Werror=format-security \
+        -fstack-clash-protection -fcf-protection")
 
 set(SOURCE_FILES
         main.cc