diff --git a/cmake/FairMQProjectSettings.cmake b/cmake/FairMQProjectSettings.cmake
index 8db7da5d..b3621c8d 100644
--- a/cmake/FairMQProjectSettings.cmake
+++ b/cmake/FairMQProjectSettings.cmake
@@ -114,8 +114,8 @@ endif()
 set(CMAKE_CONFIGURATION_TYPES "Debug" "Release" "RelWithDebInfo")
 set(_warnings "-Wshadow -Wall -Wextra -Wpedantic")
 set(CMAKE_CXX_FLAGS_DEBUG          "-Og -g ${_warnings} ${_sanitizers}")
-set(CMAKE_CXX_FLAGS_RELEASE        "-O2 -DNDEBUG")
-set(CMAKE_CXX_FLAGS_RELWITHDEBINFO "-O2 -g ${_warnings} -DNDEBUG ${_sanitizers}")
+set(CMAKE_CXX_FLAGS_RELEASE        "-O3 -DNDEBUG")
+set(CMAKE_CXX_FLAGS_RELWITHDEBINFO "-O3 -g ${_warnings} -DNDEBUG ${_sanitizers}")
 unset(_warnings)
 unset(_sanitizers)