diff --git a/argument.cpp b/argument.cpp
index 8931969..ed74a9d 100644
--- a/argument.cpp
+++ b/argument.cpp
@@ -39,7 +39,7 @@
     { 0, 0, 0, 0},
 };
 
-ArgumentParser::ArgumentParser(int argc, char** argv)
+ArgumentParser::ArgumentParser(int argc, char * const argv[])
 {
     int option = 0;
 
@@ -83,7 +83,7 @@
     }
 }
 
-void ArgumentParser::usage(char** argv)
+void ArgumentParser::usage(char * const argv[])
 {
     std::cerr << "Usage: " << argv[0] << " options\n";
     std::cerr << "Options:\n";
diff --git a/argument.hpp b/argument.hpp
index 29993d6..ee9e8c8 100644
--- a/argument.hpp
+++ b/argument.hpp
@@ -27,7 +27,7 @@
          *  @param argv - the main function's argv passed as is
          *  @return Object constructed
          */
-        ArgumentParser(int argc, char** argv);
+        ArgumentParser(int argc, char * const argv[]);
 
         /** @brief Given an option, returns its argument(optarg)
          *
@@ -41,7 +41,7 @@
          *
          *  @param argv - the main function's argv passed as is
          */
-        static void usage(char** argv);
+        static void usage(char * const argv[]);
 
         /** @brief Set to 'true' when an option is passed */
         static const std::string trueString;