diff --git a/include/cb/argparser/argument_parser.h b/include/cb/argparser/argument_parser.h
index 665eae5..8730416 100644
--- a/include/cb/argparser/argument_parser.h
+++ b/include/cb/argparser/argument_parser.h
@@ -14,12 +14,8 @@
 #include <algorithm>
 
 
-namespace cb {
-    using ArgumentMapType = std::unordered_map<std::string, cb::argparser::Argument>;
-}
-
-
 namespace cb::argparser {
+using ArgumentMapType = std::unordered_map<std::string, cb::argparser::Argument>;
 
 class ArgumentMap : public ArgumentMapType {
 public: