diff --git a/tools/warnings/extra-cflags b/tools/warnings/extra-cflags
index 6492588382..ce92a20a1a 100644
--- a/tools/warnings/extra-cflags
+++ b/tools/warnings/extra-cflags
@@ -1 +1 @@
--Wall -Wextra
+-Wall -Wextra -Wconversion -Wsign-conversion
diff --git a/tools/warnings/extra-cxxflags b/tools/warnings/extra-cxxflags
index 6492588382..ce92a20a1a 100644
--- a/tools/warnings/extra-cxxflags
+++ b/tools/warnings/extra-cxxflags
@@ -1 +1 @@
--Wall -Wextra
+-Wall -Wextra -Wconversion -Wsign-conversion