diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1758f310..dc66d3c9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,7 @@ HEAD
 ----
 
 * Improve error messages when using `char` or `char*` (issue #2043)
+* Mark `JsonArray`, `JsonObject`, and `JsonVariant` as `final` (issue #2056)
 
 v6.21.5 (2024-01-10)
 -------
diff --git a/src/ArduinoJson/Array/JsonArray.hpp b/src/ArduinoJson/Array/JsonArray.hpp
index d208e417..6a2944e8 100644
--- a/src/ArduinoJson/Array/JsonArray.hpp
+++ b/src/ArduinoJson/Array/JsonArray.hpp
@@ -13,7 +13,7 @@ class JsonObject;
 
 // A reference to an array in a JsonDocument
 // https://arduinojson.org/v6/api/jsonarray/
-class JsonArray : public detail::VariantOperators<JsonArray> {
+class JsonArray final : public detail::VariantOperators<JsonArray> {
   friend class detail::VariantAttorney;
 
  public:
diff --git a/src/ArduinoJson/Array/JsonArrayConst.hpp b/src/ArduinoJson/Array/JsonArrayConst.hpp
index 6a6463c8..8024fd51 100644
--- a/src/ArduinoJson/Array/JsonArrayConst.hpp
+++ b/src/ArduinoJson/Array/JsonArrayConst.hpp
@@ -14,7 +14,7 @@ class JsonObject;
 
 // A read-only reference to an array in a JsonDocument
 // https://arduinojson.org/v6/api/jsonarrayconst/
-class JsonArrayConst : public detail::VariantOperators<JsonArrayConst> {
+class JsonArrayConst final : public detail::VariantOperators<JsonArrayConst> {
   friend class JsonArray;
   friend class detail::VariantAttorney;
 
diff --git a/src/ArduinoJson/Array/JsonArrayIterator.hpp b/src/ArduinoJson/Array/JsonArrayIterator.hpp
index d9048b28..b6f39976 100644
--- a/src/ArduinoJson/Array/JsonArrayIterator.hpp
+++ b/src/ArduinoJson/Array/JsonArrayIterator.hpp
@@ -9,7 +9,7 @@
 
 ARDUINOJSON_BEGIN_PUBLIC_NAMESPACE
 
-class VariantPtr {
+class VariantPtr final {
  public:
   VariantPtr(detail::MemoryPool* pool, detail::VariantData* data)
       : variant_(pool, data) {}
@@ -26,7 +26,7 @@ class VariantPtr {
   JsonVariant variant_;
 };
 
-class JsonArrayIterator {
+class JsonArrayIterator final {
   friend class JsonArray;
 
  public:
@@ -65,7 +65,7 @@ class JsonArrayIterator {
   detail::VariantSlot* slot_;
 };
 
-class VariantConstPtr {
+class VariantConstPtr final {
  public:
   VariantConstPtr(const detail::VariantData* data) : variant_(data) {}
 
@@ -81,7 +81,7 @@ class VariantConstPtr {
   JsonVariantConst variant_;
 };
 
-class JsonArrayConstIterator {
+class JsonArrayConstIterator final {
   friend class JsonArray;
 
  public:
diff --git a/src/ArduinoJson/Object/JsonObject.hpp b/src/ArduinoJson/Object/JsonObject.hpp
index 7cdc1c76..1a4e0cfe 100644
--- a/src/ArduinoJson/Object/JsonObject.hpp
+++ b/src/ArduinoJson/Object/JsonObject.hpp
@@ -13,7 +13,7 @@ class JsonArray;
 
 // A reference to an object in a JsonDocument.
 // https://arduinojson.org/v6/api/jsonobject/
-class JsonObject : public detail::VariantOperators<JsonObject> {
+class JsonObject final : public detail::VariantOperators<JsonObject> {
   friend class detail::VariantAttorney;
 
  public:
diff --git a/src/ArduinoJson/Object/JsonObjectConst.hpp b/src/ArduinoJson/Object/JsonObjectConst.hpp
index e9b5e483..6520c76d 100644
--- a/src/ArduinoJson/Object/JsonObjectConst.hpp
+++ b/src/ArduinoJson/Object/JsonObjectConst.hpp
@@ -11,7 +11,7 @@ ARDUINOJSON_BEGIN_PUBLIC_NAMESPACE
 
 // A read-only reference to an object in a JsonDocument.
 // https://arduinojson.org/v6/api/jsonobjectconst/
-class JsonObjectConst : public detail::VariantOperators<JsonObjectConst> {
+class JsonObjectConst final : public detail::VariantOperators<JsonObjectConst> {
   friend class JsonObject;
   friend class detail::VariantAttorney;
 
diff --git a/src/ArduinoJson/Object/JsonObjectIterator.hpp b/src/ArduinoJson/Object/JsonObjectIterator.hpp
index 55c09ed7..750394d5 100644
--- a/src/ArduinoJson/Object/JsonObjectIterator.hpp
+++ b/src/ArduinoJson/Object/JsonObjectIterator.hpp
@@ -9,7 +9,7 @@
 
 ARDUINOJSON_BEGIN_PUBLIC_NAMESPACE
 
-class JsonPairPtr {
+class JsonPairPtr final {
  public:
   JsonPairPtr(detail::MemoryPool* pool, detail::VariantSlot* slot)
       : pair_(pool, slot) {}
@@ -26,7 +26,7 @@ class JsonPairPtr {
   JsonPair pair_;
 };
 
-class JsonObjectIterator {
+class JsonObjectIterator final {
   friend class JsonObject;
 
  public:
@@ -66,7 +66,7 @@ class JsonObjectIterator {
   detail::VariantSlot* slot_;
 };
 
-class JsonPairConstPtr {
+class JsonPairConstPtr final {
  public:
   JsonPairConstPtr(const detail::VariantSlot* slot) : pair_(slot) {}
 
@@ -82,7 +82,7 @@ class JsonPairConstPtr {
   JsonPairConst pair_;
 };
 
-class JsonObjectConstIterator {
+class JsonObjectConstIterator final {
   friend class JsonObject;
 
  public:
diff --git a/src/ArduinoJson/Object/JsonPair.hpp b/src/ArduinoJson/Object/JsonPair.hpp
index 862a6579..350979fd 100644
--- a/src/ArduinoJson/Object/JsonPair.hpp
+++ b/src/ArduinoJson/Object/JsonPair.hpp
@@ -12,7 +12,7 @@ ARDUINOJSON_BEGIN_PUBLIC_NAMESPACE
 
 // A key-value pair.
 // https://arduinojson.org/v6/api/jsonobject/begin_end/
-class JsonPair {
+class JsonPair final {
  public:
   // INTERNAL USE ONLY
   JsonPair(detail::MemoryPool* pool, detail::VariantSlot* slot) {
@@ -40,7 +40,7 @@ class JsonPair {
 
 // A read-only key-value pair.
 // https://arduinojson.org/v6/api/jsonobjectconst/begin_end/
-class JsonPairConst {
+class JsonPairConst final {
  public:
   JsonPairConst(const detail::VariantSlot* slot) {
     if (slot) {
diff --git a/src/ArduinoJson/Variant/JsonVariant.hpp b/src/ArduinoJson/Variant/JsonVariant.hpp
index d1f122e9..81408801 100644
--- a/src/ArduinoJson/Variant/JsonVariant.hpp
+++ b/src/ArduinoJson/Variant/JsonVariant.hpp
@@ -10,8 +10,8 @@ ARDUINOJSON_BEGIN_PUBLIC_NAMESPACE
 
 // A reference to a value in a JsonDocument.
 // https://arduinojson.org/v6/api/jsonvariant/
-class JsonVariant : public detail::VariantRefBase<JsonVariant>,
-                    public detail::VariantOperators<JsonVariant> {
+class JsonVariant final : public detail::VariantRefBase<JsonVariant>,
+                          public detail::VariantOperators<JsonVariant> {
   friend class detail::VariantAttorney;
 
  public:
diff --git a/src/ArduinoJson/Variant/JsonVariantConst.hpp b/src/ArduinoJson/Variant/JsonVariantConst.hpp
index 606df083..e90ba080 100644
--- a/src/ArduinoJson/Variant/JsonVariantConst.hpp
+++ b/src/ArduinoJson/Variant/JsonVariantConst.hpp
@@ -24,8 +24,9 @@ class JsonObject;
 
 // A read-only reference to a value in a JsonDocument
 // https://arduinojson.org/v6/api/jsonarrayconst/
-class JsonVariantConst : public detail::VariantTag,
-                         public detail::VariantOperators<JsonVariantConst> {
+class JsonVariantConst final
+    : public detail::VariantTag,
+      public detail::VariantOperators<JsonVariantConst> {
   friend class detail::VariantAttorney;
 
  public: