diff --git a/CMake/CatchMiscFunctions.cmake b/CMake/CatchMiscFunctions.cmake
index de6b7ae3..aa8eb1d1 100644
--- a/CMake/CatchMiscFunctions.cmake
+++ b/CMake/CatchMiscFunctions.cmake
@@ -77,6 +77,7 @@ function(add_warnings_to_targets targets)
           "-Wreorder"
           "-Wreturn-std-move"
           "-Wshadow"
+          "-Wsign-conversion"
           "-Wstrict-aliasing"
           "-Wsuggest-destructor-override"
           "-Wsuggest-override"