diff --git a/control/json/utils/modifier.hpp b/control/json/utils/modifier.hpp
index 8959203..92fdb70 100644
--- a/control/json/utils/modifier.hpp
+++ b/control/json/utils/modifier.hpp
@@ -80,7 +80,7 @@
      *
      * @param[in] jsonObj - The JSON config object
      */
-    Modifier(const json& jsonObj);
+    explicit Modifier(const json& jsonObj);
 
     /**
      * @brief Performs the operation