diff --git a/src/cli/cli_handler.cc b/src/cli/cli_handler.cc
index 1079aeba..12b902e3 100644
--- a/src/cli/cli_handler.cc
+++ b/src/cli/cli_handler.cc
@@ -72,7 +72,8 @@ cli_flow_t cli_handler::parse(int argc, const char **argv)
     static const std::map<std::string, clanguml::common::generator_type_t>
         generator_type_names{
             {"plantuml", clanguml::common::generator_type_t::plantuml},
-            {"json", clanguml::common::generator_type_t::json}};
+            {"json", clanguml::common::generator_type_t::json},
+            {"mermaid", clanguml::common::generator_type_t::mermaid}};
 
     app.add_option("-c,--config", config_path,
         "Location of configuration file, when '-' read from stdin");