diff --git a/CMakeLists.txt b/CMakeLists.txt
index 8341f6b6..5954ac87 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -15,6 +15,8 @@ endfunction()
 
 if (CMAKE_CXX_COMPILER_ID MATCHES "GNU")
     add_compile_options(-Wall -Wextra -pedantic -Wcast-qual -Wfloat-equal -Wmissing-declarations -Wmissing-format-attribute -Wredundant-decls -Wshadow -Wundef -Wold-style-cast -Wno-multichar)
+elseif (CMAKE_CXX_COMPILER_ID MATCHES "MSVC")
+    add_compile_definitions(_CRT_SECURE_NO_WARNINGS)
 elseif (CMAKE_CXX_COMPILER_ID MATCHES "Clang")
     add_compile_options(-Weverything)
     # no need for c++98 compatibility
diff --git a/simplecpp.h b/simplecpp.h
index 5b918a98..1857908d 100755
--- a/simplecpp.h
+++ b/simplecpp.h
@@ -44,6 +44,12 @@
 #define nullptr NULL
 #endif
 
+#if defined(_MSC_VER)
+// suppress warnings about "conversion from 'type1' to 'type2', possible loss of data"
+#  pragma warning(disable : 4267)
+#  pragma warning(disable : 4244)
+#endif
+
 namespace simplecpp {
 
     typedef std::string TokenString;