diff --git a/include/nlohmann/json.hpp b/include/nlohmann/json.hpp
index 536d71f74..19fc9da39 100644
--- a/include/nlohmann/json.hpp
+++ b/include/nlohmann/json.hpp
@@ -3158,14 +3158,14 @@ class basic_json // NOLINT(cppcoreguidelines-special-member-functions,hicpp-spec
 
     /// @brief updates a JSON object from another object, overwriting existing keys
     /// @sa https://json.nlohmann.me/api/basic_json/update/
-    void update(const_reference j)
+    void update(const_reference j, bool merge_objects = false)
     {
         update(j.begin(), j.end(), merge_objects);
     }
 
     /// @brief updates a JSON object from another object, overwriting existing keys
     /// @sa https://json.nlohmann.me/api/basic_json/update/
-    void update(const_iterator first, const_iterator last)
+    void update(const_iterator first, const_iterator last, bool merge_objects = false)
     {
         // implicitly convert null value to an empty object
         if (is_null())
diff --git a/single_include/nlohmann/json.hpp b/single_include/nlohmann/json.hpp
index f0792b0df..3b7d86671 100644
--- a/single_include/nlohmann/json.hpp
+++ b/single_include/nlohmann/json.hpp
@@ -20659,14 +20659,14 @@ class basic_json // NOLINT(cppcoreguidelines-special-member-functions,hicpp-spec
 
     /// @brief updates a JSON object from another object, overwriting existing keys
     /// @sa https://json.nlohmann.me/api/basic_json/update/
-    void update(const_reference j)
+    void update(const_reference j, bool merge_objects = false)
     {
         update(j.begin(), j.end(), merge_objects);
     }
 
     /// @brief updates a JSON object from another object, overwriting existing keys
     /// @sa https://json.nlohmann.me/api/basic_json/update/
-    void update(const_iterator first, const_iterator last)
+    void update(const_iterator first, const_iterator last, bool merge_objects = false)
     {
         // implicitly convert null value to an empty object
         if (is_null())