diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3c28484..12ebf86 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -37,6 +37,7 @@ endif()
 if (NOT "${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC")
     message(STATUS "No MSVC compiler in use")
     set(CMAKE_CXX_FLAGS "-Wall -Wparentheses -Winline -Wbad-function-cast -Wdisabled-optimization -Wextra")
+    set(CMAKE_CXX_FLAGS_RELEASE "-O3")
 else()
     message(STATUS "MSVC compiler in use")
     set(CMAKE_CXX_FLAGS "/Wall /W2")