diff --git a/CHANGELOG.md b/CHANGELOG.md
index f316b7fa..cf06e942 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -16,6 +16,7 @@ HEAD
 * Removed `JsonBuffer::createArray()` and `createObject()`
 * Removed `printTo()` and `prettyPrintTo()`
 * Removed `measureLength()` and `measurePrettyLength()`
+* Removed all deprecated features
 
 > ### BREAKING CHANGES
 > 
diff --git a/src/ArduinoJson/Configuration.hpp b/src/ArduinoJson/Configuration.hpp
index 82483adf..2d0d1476 100644
--- a/src/ArduinoJson/Configuration.hpp
+++ b/src/ArduinoJson/Configuration.hpp
@@ -130,11 +130,6 @@
 #endif
 #endif
 
-// Enable deprecated functions by default
-#ifndef ARDUINOJSON_ENABLE_DEPRECATED
-#define ARDUINOJSON_ENABLE_DEPRECATED 1
-#endif
-
 // Control the exponentiation threshold for big numbers
 // CAUTION: cannot be more that 1e9 !!!!
 #ifndef ARDUINOJSON_POSITIVE_EXPONENTIATION_THRESHOLD
diff --git a/src/ArduinoJson/JsonArray.hpp b/src/ArduinoJson/JsonArray.hpp
index 2a9dc26d..c050cf7e 100644
--- a/src/ArduinoJson/JsonArray.hpp
+++ b/src/ArduinoJson/JsonArray.hpp
@@ -180,13 +180,6 @@ class JsonArray : public Internals::ReferenceType,
     }
   }
 
-#if ARDUINOJSON_ENABLE_DEPRECATED
-  DEPRECATED("use remove() instead")
-  FORCE_INLINE void removeAt(size_t index) {
-    return remove(index);
-  }
-#endif
-
  private:
   template <typename TValueRef>
   bool set_impl(size_t index, TValueRef value) {
diff --git a/src/ArduinoJson/JsonArraySubscript.hpp b/src/ArduinoJson/JsonArraySubscript.hpp
index de40afc1..a9633991 100644
--- a/src/ArduinoJson/JsonArraySubscript.hpp
+++ b/src/ArduinoJson/JsonArraySubscript.hpp
@@ -73,14 +73,6 @@ class JsonArraySubscript : public JsonVariantBase<JsonArraySubscript> {
   FORCE_INLINE bool set(TValue* value) {
     return _array.set(_index, value);
   }
-  //
-  // bool set(TValue, uint8_t decimals);
-  // TValue = float, double
-  template <typename TValue>
-  DEPRECATED("Second argument is not supported anymore")
-  FORCE_INLINE bool set(const TValue& value, uint8_t) {
-    return _array.set(_index, value);
-  }
 
  private:
   JsonArray& _array;
diff --git a/src/ArduinoJson/JsonBuffer.hpp b/src/ArduinoJson/JsonBuffer.hpp
index f49f423c..1bd434ce 100644
--- a/src/ArduinoJson/JsonBuffer.hpp
+++ b/src/ArduinoJson/JsonBuffer.hpp
@@ -24,25 +24,6 @@ class JsonObject;
 // fixed memory allocation.
 class JsonBuffer : Internals::NonCopyable {
  public:
-  // Duplicates a string
-  //
-  // const char* strdup(TValue);
-  // TValue = const std::string&, const String&,
-  template <typename TString>
-  DEPRECATED("char* are duplicated, you don't need strdup() anymore")
-  typename Internals::EnableIf<!Internals::IsArray<TString>::value,
-                               const char *>::type strdup(const TString &src) {
-    return Internals::StringTraits<TString>::duplicate(src, this);
-  }
-  //
-  // const char* strdup(TValue);
-  // TValue = char*, const char*, const FlashStringHelper*
-  template <typename TString>
-  DEPRECATED("char* are duplicated, you don't need strdup() anymore")
-  const char *strdup(TString *src) {
-    return Internals::StringTraits<TString *>::duplicate(src, this);
-  }
-
   // Allocates n bytes in the JsonBuffer.
   // Return a pointer to the allocated memory or NULL if allocation fails.
   virtual void *alloc(size_t size) = 0;
diff --git a/src/ArduinoJson/JsonObject.hpp b/src/ArduinoJson/JsonObject.hpp
index d182ae7a..502cc038 100644
--- a/src/ArduinoJson/JsonObject.hpp
+++ b/src/ArduinoJson/JsonObject.hpp
@@ -112,29 +112,6 @@ class JsonObject : public Internals::ReferenceType,
   bool set(TString* key, TValue* value) {
     return set_impl<TString*, TValue*>(key, value);
   }
-  //
-  // bool set(TKey, TValue, uint8_t decimals);
-  // TKey = const std::string&, const String&
-  // TValue = float, double
-  template <typename TValue, typename TString>
-  DEPRECATED("Second argument is not supported anymore")
-  typename Internals::EnableIf<Internals::IsFloatingPoint<TValue>::value,
-                               bool>::type
-      set(const TString& key, TValue value, uint8_t) {
-    return set_impl<const TString&, const JsonVariant&>(key,
-                                                        JsonVariant(value));
-  }
-  //
-  // bool set(TKey, TValue, uint8_t decimals);
-  // TKey = char*, const char*, const FlashStringHelper*
-  // TValue = float, double
-  template <typename TValue, typename TString>
-  DEPRECATED("Second argument is not supported anymore")
-  typename Internals::EnableIf<Internals::IsFloatingPoint<TValue>::value,
-                               bool>::type
-      set(TString* key, TValue value, uint8_t) {
-    return set_impl<TString*, const JsonVariant&>(key, JsonVariant(value));
-  }
 
   // Gets the value associated with the specified key.
   //
diff --git a/src/ArduinoJson/JsonObjectSubscript.hpp b/src/ArduinoJson/JsonObjectSubscript.hpp
index e108f3f5..832d0ca9 100644
--- a/src/ArduinoJson/JsonObjectSubscript.hpp
+++ b/src/ArduinoJson/JsonObjectSubscript.hpp
@@ -81,14 +81,6 @@ class JsonObjectSubscript
   FORCE_INLINE bool set(const TValue* value) {
     return _object.set(_key, value);
   }
-  //
-  // bool set(TValue, uint8_t decimals);
-  // TValue = float, double
-  template <typename TValue>
-  DEPRECATED("Second argument is not supported anymore")
-  FORCE_INLINE bool set(const TValue& value, uint8_t) {
-    return _object.set(_key, value);
-  }
 
  private:
   JsonObject& _object;
diff --git a/src/ArduinoJson/JsonVariant.hpp b/src/ArduinoJson/JsonVariant.hpp
index 9fffb4af..598df822 100644
--- a/src/ArduinoJson/JsonVariant.hpp
+++ b/src/ArduinoJson/JsonVariant.hpp
@@ -65,15 +65,6 @@ class JsonVariant : public Internals::JsonVariantBase<JsonVariant> {
     _type = JSON_FLOAT;
     _content.asFloat = static_cast<JsonFloat>(value);
   }
-  template <typename T>
-  DEPRECATED("Second argument is not supported anymore")
-  JsonVariant(T value, uint8_t,
-              typename Internals::EnableIf<
-                  Internals::IsFloatingPoint<T>::value>::type * = 0) {
-    using namespace Internals;
-    _type = JSON_FLOAT;
-    _content.asFloat = static_cast<JsonFloat>(value);
-  }
 
   // Create a JsonVariant containing an integer value.
   // JsonVariant(char)
@@ -355,14 +346,4 @@ class JsonVariant : public Internals::JsonVariantBase<JsonVariant> {
   // The various alternatives for the value of the variant.
   Internals::JsonVariantContent _content;
 };
-
-DEPRECATED("Decimal places are ignored, use the float value instead")
-inline JsonVariant float_with_n_digits(float value, uint8_t) {
-  return JsonVariant(value);
-}
-
-DEPRECATED("Decimal places are ignored, use the double value instead")
-inline JsonVariant double_with_n_digits(double value, uint8_t) {
-  return JsonVariant(value);
-}
 }  // namespace ArduinoJson
diff --git a/src/ArduinoJson/JsonVariantCasts.hpp b/src/ArduinoJson/JsonVariantCasts.hpp
index 68f5bd7d..3f4ee018 100644
--- a/src/ArduinoJson/JsonVariantCasts.hpp
+++ b/src/ArduinoJson/JsonVariantCasts.hpp
@@ -13,23 +13,6 @@ namespace Internals {
 template <typename TImpl>
 class JsonVariantCasts {
  public:
-#if ARDUINOJSON_ENABLE_DEPRECATED
-  DEPRECATED("use as<JsonArray>() instead")
-  FORCE_INLINE JsonArray &asArray() const {
-    return impl()->template as<JsonArray>();
-  }
-
-  DEPRECATED("use as<JsonObject>() instead")
-  FORCE_INLINE JsonObject &asObject() const {
-    return impl()->template as<JsonObject>();
-  }
-
-  DEPRECATED("use as<char*>() instead")
-  FORCE_INLINE const char *asString() const {
-    return impl()->template as<const char *>();
-  }
-#endif
-
   // Gets the variant as an array.
   // Returns a reference to the JsonArray or JsonArray::invalid() if the
   // variant
@@ -55,5 +38,5 @@ class JsonVariantCasts {
     return static_cast<const TImpl *>(this);
   }
 };
-}
-}
+}  // namespace Internals
+}  // namespace ArduinoJson
diff --git a/test/Misc/CMakeLists.txt b/test/Misc/CMakeLists.txt
index 0b54bd7b..28e273d0 100644
--- a/test/Misc/CMakeLists.txt
+++ b/test/Misc/CMakeLists.txt
@@ -3,7 +3,6 @@
 # MIT License
 
 add_executable(MiscTests 
-	deprecated.cpp
 	FloatParts.cpp
 	std_stream.cpp
 	std_string.cpp
diff --git a/test/Misc/deprecated.cpp b/test/Misc/deprecated.cpp
deleted file mode 100644
index b84ad65c..00000000
--- a/test/Misc/deprecated.cpp
+++ /dev/null
@@ -1,140 +0,0 @@
-// ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
-// MIT License
-
-#define ARDUINOJSON_ENABLE_DEPRECATED 1
-
-#include <ArduinoJson.h>
-#include <catch.hpp>
-
-#if defined(__clang__)
-#pragma clang diagnostic ignored "-Wdeprecated-declarations"
-#elif defined(__GNUC__)
-#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
-#elif defined(_MSC_VER)
-#pragma warning(disable : 4996)
-#endif
-
-TEST_CASE("Deprecated functions") {
-  SECTION("JsonVariant::asArray()") {
-    DynamicJsonArray array;
-    JsonVariant variant = array;
-    REQUIRE(variant.asArray().success());
-  }
-
-  SECTION("JsonVariant::asObject()") {
-    DynamicJsonObject obj;
-    JsonVariant variant = obj;
-    REQUIRE(variant.asObject().success());
-  }
-
-  SECTION("JsonVariant::asString()") {
-    JsonVariant variant = "hello";
-    REQUIRE(std::string("hello") == variant.asString());
-  }
-
-  SECTION("JsonArray::removeAt()") {
-    DynamicJsonArray arr;
-    arr.removeAt(0);
-  }
-
-  SECTION("JsonVariant::JsonVariant(float, uint8_t)") {
-    JsonVariant variant(3.14f, 2);
-    REQUIRE(variant == 3.14f);
-  }
-
-  SECTION("JsonVariant::JsonVariant(double, uint8_t)") {
-    JsonVariant variant(3.14, 2);
-    REQUIRE(variant == 3.14);
-  }
-
-  SECTION("float_with_n_digits()") {
-    JsonVariant variant = float_with_n_digits(3.14f, 4);
-    REQUIRE(variant == 3.14f);
-  }
-
-  SECTION("double_with_n_digits()") {
-    JsonVariant variant = double_with_n_digits(3.14f, 4);
-    REQUIRE(variant == 3.14f);
-  }
-
-  SECTION("JsonArraySubscript::set(double, uint8_t)") {
-    DynamicJsonArray arr;
-    arr.add(666);
-    arr[0].set(123.45, 2);
-    REQUIRE(123.45 == arr[0].as<double>());
-    REQUIRE(true == arr[0].is<double>());
-    REQUIRE(false == arr[0].is<int>());
-  }
-
-  SECTION("JsonArray::add(double, uint8_t)") {
-    DynamicJsonArray arr;
-    arr.add(3.14159265358979323846, 4);
-  }
-
-  SECTION("JsonArray::add(float, uint8_t)") {
-    DynamicJsonArray arr;
-    arr.add(3.14159265358979323846f, 4);
-  }
-
-  SECTION("JsonObject::set(unsigned char[], double, uint8_t)") {
-    unsigned char key[] = "hello";
-
-    DynamicJsonObject obj;
-    obj.set(key, 3.14, 2);
-
-    REQUIRE(3.14 == obj["hello"]);
-  }
-
-  SECTION("JsonObject::set(const char*, double, uint8_t)") {
-    DynamicJsonObject obj;
-    obj.set("hello", 123.45, 2);
-
-    REQUIRE(123.45 == obj["hello"].as<double>());
-    REQUIRE(obj["hello"].is<double>());
-    REQUIRE_FALSE(obj["hello"].is<long>());
-  }
-
-  SECTION("JsonObjectSubscript::set(double, uint8_t)") {
-    DynamicJsonObject obj;
-    obj["hello"].set(123.45, 2);
-
-    REQUIRE(true == obj["hello"].is<double>());
-    REQUIRE(false == obj["hello"].is<long>());
-    REQUIRE(123.45 == obj["hello"].as<double>());
-  }
-}
-
-TEST_CASE("DynamicJsonBuffer::strdup()") {
-  DynamicJsonBuffer buffer;
-
-  SECTION("char*") {
-    char original[] = "hello";
-    const char* copy = buffer.strdup(original);
-    strcpy(original, "world");
-    REQUIRE(std::string("hello") == copy);
-  }
-
-  SECTION("unsigned char*") {
-    unsigned char value[] = "world";
-
-    DynamicJsonBuffer jsonBuffer;
-    const char* dup = jsonBuffer.strdup(value);
-
-    REQUIRE(static_cast<const void*>(value) != static_cast<const void*>(dup));
-    REQUIRE(std::string("world") == dup);
-  }
-
-  SECTION("std::string") {
-    std::string original("hello");
-    const char* copy = buffer.strdup(original);
-    original[0] = 'w';
-    REQUIRE(std::string("hello") == copy);
-  }
-
-  SECTION("NULL") {
-    const char* original = NULL;
-    const char* copy = buffer.strdup(original);
-    REQUIRE(0 == copy);
-  }
-}