diff --git a/include/cxxopts.hpp b/include/cxxopts.hpp
index c7ce60b..2f4c33e 100644
--- a/include/cxxopts.hpp
+++ b/include/cxxopts.hpp
@@ -551,7 +551,7 @@ namespace cxxopts
       // if we got to here, then `t` is a positive number that fits into
       // `R`. So to avoid MSVC C4146, we first cast it to `R`.
       // See https://github.com/jarro2783/cxxopts/issues/62 for more details.
-      return -static_cast<R>(t-1)-1;
+      return static_cast<R>(-static_cast<R>(t-1)-1);
     }
 
     template <typename R, typename T>
@@ -611,7 +611,7 @@ namespace cxxopts
           throw_or_mimic<argument_incorrect_type>(text);
         }
 
-        US next = result * base + digit;
+        const US next = static_cast<US>(result * base + digit);
         if (result > next)
         {
           throw_or_mimic<argument_incorrect_type>(text);
diff --git a/test/options.cpp b/test/options.cpp
index d110e01..d3d3c7a 100644
--- a/test/options.cpp
+++ b/test/options.cpp
@@ -9,7 +9,7 @@ class Argv {
 
   Argv(std::initializer_list<const char*> args)
   : m_argv(new char*[args.size()])
-  , m_argc(args.size())
+  , m_argc(static_cast<int>(args.size()))
   {
     int i = 0;
     auto iter = args.begin();