diff --git a/CMakeLists.txt b/CMakeLists.txt
index b799a62f..1e933d2a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -37,6 +37,7 @@ if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC")
 else()
   add_cxx_compiler_flag(-Wall)
 endif()
+add_cxx_compiler_flag(-Wconversion)
 add_cxx_compiler_flag(-Wextra)
 add_cxx_compiler_flag(-Wshadow)
 add_cxx_compiler_flag(-Werror RELEASE)