diff --git a/dump_manager.hpp b/dump_manager.hpp
index 2dda186..18f6ad8 100644
--- a/dump_manager.hpp
+++ b/dump_manager.hpp
@@ -29,7 +29,7 @@
 
   public:
     Manager() = delete;
-    Manager(const Manager&) = default;
+    Manager(const Manager&) = delete;
     Manager& operator=(const Manager&) = delete;
     Manager(Manager&&) = delete;
     Manager& operator=(Manager&&) = delete;