diff --git a/include/json/allocator.h b/include/json/allocator.h
index d5f987e..0f5c224 100644
--- a/include/json/allocator.h
+++ b/include/json/allocator.h
@@ -3,8 +3,8 @@
 // recognized in your jurisdiction.
 // See file LICENSE for detail or copy at http://jsoncpp.sourceforge.net/LICENSE
 
-#ifndef CPPTL_JSON_ALLOCATOR_H_INCLUDED
-#define CPPTL_JSON_ALLOCATOR_H_INCLUDED
+#ifndef JSON_ALLOCATOR_H_INCLUDED
+#define JSON_ALLOCATOR_H_INCLUDED
 
 #include <cstring>
 #include <memory>
@@ -86,4 +86,4 @@ bool operator!=(const SecureAllocator<T>&, const SecureAllocator<U>&) {
 
 #pragma pack(pop)
 
-#endif // CPPTL_JSON_ALLOCATOR_H_INCLUDED
+#endif // JSON_ALLOCATOR_H_INCLUDED
diff --git a/include/json/assertions.h b/include/json/assertions.h
index 20716b0..9d93238 100644
--- a/include/json/assertions.h
+++ b/include/json/assertions.h
@@ -3,8 +3,8 @@
 // recognized in your jurisdiction.
 // See file LICENSE for detail or copy at http://jsoncpp.sourceforge.net/LICENSE
 
-#ifndef CPPTL_JSON_ASSERTIONS_H_INCLUDED
-#define CPPTL_JSON_ASSERTIONS_H_INCLUDED
+#ifndef JSON_ASSERTIONS_H_INCLUDED
+#define JSON_ASSERTIONS_H_INCLUDED
 
 #include <cstdlib>
 #include <sstream>
@@ -56,4 +56,4 @@
     JSON_FAIL_MESSAGE(message);                                                \
   }
 
-#endif // CPPTL_JSON_ASSERTIONS_H_INCLUDED
+#endif // JSON_ASSERTIONS_H_INCLUDED
diff --git a/include/json/autolink.h b/include/json/autolink.h
deleted file mode 100644
index b2c0f00..0000000
--- a/include/json/autolink.h
+++ /dev/null
@@ -1,25 +0,0 @@
-// Copyright 2007-2010 Baptiste Lepilleur and The JsonCpp Authors
-// Distributed under MIT license, or public domain if desired and
-// recognized in your jurisdiction.
-// See file LICENSE for detail or copy at http://jsoncpp.sourceforge.net/LICENSE
-
-#ifndef JSON_AUTOLINK_H_INCLUDED
-#define JSON_AUTOLINK_H_INCLUDED
-
-#include "config.h"
-
-#ifdef JSON_IN_CPPTL
-#include <cpptl/cpptl_autolink.h>
-#endif
-
-#if !defined(JSON_NO_AUTOLINK) && !defined(JSON_DLL_BUILD) &&                  \
-    !defined(JSON_IN_CPPTL)
-#define CPPTL_AUTOLINK_NAME "json"
-#undef CPPTL_AUTOLINK_DLL
-#ifdef JSON_DLL
-#define CPPTL_AUTOLINK_DLL
-#endif
-#include "autolink.h"
-#endif
-
-#endif // JSON_AUTOLINK_H_INCLUDED
diff --git a/include/json/config.h b/include/json/config.h
index cbb5950..0a3bc92 100644
--- a/include/json/config.h
+++ b/include/json/config.h
@@ -14,16 +14,6 @@
 #include <string>
 #include <type_traits>
 
-/// If defined, indicates that json library is embedded in CppTL library.
-//# define JSON_IN_CPPTL 1
-
-/// If defined, indicates that json may leverage CppTL library
-//#  define JSON_USE_CPPTL 1
-/// If defined, indicates that cpptl vector based map should be used instead of
-/// std::map
-/// as Value container.
-//#  define JSON_USE_CPPTL_SMALLMAP 1
-
 // If non-zero, the library uses exceptions to report bad input instead of C
 // assertion macros. The default is to use exceptions.
 #ifndef JSON_USE_EXCEPTION
@@ -40,28 +30,22 @@
 /// Remarks: it is automatically defined in the generated amalgamated header.
 // #define JSON_IS_AMALGAMATION
 
-#ifdef JSON_IN_CPPTL
-#include <cpptl/config.h>
-#ifndef JSON_USE_CPPTL
-#define JSON_USE_CPPTL 1
-#endif
-#endif
-
-#ifdef JSON_IN_CPPTL
-#define JSON_API CPPTL_API
-#elif defined(JSON_DLL_BUILD)
+// Export macros for DLL visibility
+#if defined(JSON_DLL_BUILD)
 #if defined(_MSC_VER) || defined(__MINGW32__)
 #define JSON_API __declspec(dllexport)
 #define JSONCPP_DISABLE_DLL_INTERFACE_WARNING
 #elif defined(__GNUC__) || defined(__clang__)
 #define JSON_API __attribute__((visibility("default")))
 #endif // if defined(_MSC_VER)
+
 #elif defined(JSON_DLL)
 #if defined(_MSC_VER) || defined(__MINGW32__)
 #define JSON_API __declspec(dllimport)
 #define JSONCPP_DISABLE_DLL_INTERFACE_WARNING
 #endif // if defined(_MSC_VER)
-#endif // ifdef JSON_IN_CPPTL
+#endif // ifdef JSON_DLL_BUILD
+
 #if !defined(JSON_API)
 #define JSON_API
 #endif
diff --git a/include/json/json.h b/include/json/json.h
index f1b679a..5c776a1 100644
--- a/include/json/json.h
+++ b/include/json/json.h
@@ -6,7 +6,7 @@
 #ifndef JSON_JSON_H_INCLUDED
 #define JSON_JSON_H_INCLUDED
 
-#include "autolink.h"
+#include "config.h"
 #include "json_features.h"
 #include "reader.h"
 #include "value.h"
diff --git a/include/json/json_features.h b/include/json/json_features.h
index c12d647..a5b7305 100644
--- a/include/json/json_features.h
+++ b/include/json/json_features.h
@@ -3,8 +3,8 @@
 // recognized in your jurisdiction.
 // See file LICENSE for detail or copy at http://jsoncpp.sourceforge.net/LICENSE
 
-#ifndef CPPTL_JSON_FEATURES_H_INCLUDED
-#define CPPTL_JSON_FEATURES_H_INCLUDED
+#ifndef JSON_FEATURES_H_INCLUDED
+#define JSON_FEATURES_H_INCLUDED
 
 #if !defined(JSON_IS_AMALGAMATION)
 #include "forwards.h"
@@ -64,4 +64,4 @@ public:
 
 #pragma pack(pop)
 
-#endif // CPPTL_JSON_FEATURES_H_INCLUDED
+#endif // JSON_FEATURES_H_INCLUDED
diff --git a/include/json/reader.h b/include/json/reader.h
index 0b38176..1540ac3 100644
--- a/include/json/reader.h
+++ b/include/json/reader.h
@@ -3,8 +3,8 @@
 // recognized in your jurisdiction.
 // See file LICENSE for detail or copy at http://jsoncpp.sourceforge.net/LICENSE
 
-#ifndef CPPTL_JSON_READER_H_INCLUDED
-#define CPPTL_JSON_READER_H_INCLUDED
+#ifndef JSON_READER_H_INCLUDED
+#define JSON_READER_H_INCLUDED
 
 #if !defined(JSON_IS_AMALGAMATION)
 #include "json_features.h"
@@ -400,4 +400,4 @@ JSON_API IStream& operator>>(IStream&, Value&);
 #pragma warning(pop)
 #endif // if defined(JSONCPP_DISABLE_DLL_INTERFACE_WARNING)
 
-#endif // CPPTL_JSON_READER_H_INCLUDED
+#endif // JSON_READER_H_INCLUDED
diff --git a/include/json/value.h b/include/json/value.h
index bf4f9c4..0c98441 100644
--- a/include/json/value.h
+++ b/include/json/value.h
@@ -3,8 +3,8 @@
 // recognized in your jurisdiction.
 // See file LICENSE for detail or copy at http://jsoncpp.sourceforge.net/LICENSE
 
-#ifndef CPPTL_JSON_H_INCLUDED
-#define CPPTL_JSON_H_INCLUDED
+#ifndef JSON_H_INCLUDED
+#define JSON_H_INCLUDED
 
 #if !defined(JSON_IS_AMALGAMATION)
 #include "forwards.h"
@@ -23,19 +23,11 @@
 
 #include <array>
 #include <exception>
+#include <map>
 #include <memory>
 #include <string>
 #include <vector>
 
-#ifndef JSON_USE_CPPTL_SMALLMAP
-#include <map>
-#else
-#include <cpptl/smallmap.h>
-#endif
-#ifdef JSON_USE_CPPTL
-#include <cpptl/forwards.h>
-#endif
-
 // Disable warning C4251: <data member>: <type> needs to have dll-interface to
 // be used by...
 #if defined(JSONCPP_DISABLE_DLL_INTERFACE_WARNING)
@@ -120,11 +112,6 @@ enum PrecisionType {
   decimalPlaces          ///< we set max number of digits after "." in string
 };
 
-//# ifdef JSON_USE_CPPTL
-//   typedef CppTL::AnyEnumerator<const char *> EnumMemberNames;
-//   typedef CppTL::AnyEnumerator<const Value &> EnumValues;
-//# endif
-
 /** \brief Lightweight wrapper to tag static string.
  *
  * Value constructor and objectValue member assignment takes advantage of the
@@ -287,11 +274,7 @@ private:
   };
 
 public:
-#ifndef JSON_USE_CPPTL_SMALLMAP
   typedef std::map<CZString, Value> ObjectValues;
-#else
-  typedef CppTL::SmallMap<CZString, Value> ObjectValues;
-#endif // ifndef JSON_USE_CPPTL_SMALLMAP
 #endif // ifndef JSONCPP_DOC_EXCLUDE_IMPLEMENTATION
 
 public:
@@ -340,9 +323,6 @@ public:
    */
   Value(const StaticString& value);
   Value(const String& value);
-#ifdef JSON_USE_CPPTL
-  Value(const CppTL::ConstString& value);
-#endif
   Value(bool value);
   Value(const Value& other);
   Value(Value&& other);
@@ -384,9 +364,6 @@ public:
    *  \return false if !string. (Seg-fault if str or end are NULL.)
    */
   bool getString(char const** begin, char const** end) const;
-#ifdef JSON_USE_CPPTL
-  CppTL::ConstString asConstString() const;
-#endif
   Int asInt() const;
   UInt asUInt() const;
 #if defined(JSON_HAS_INT64)
@@ -498,13 +475,6 @@ public:
    *   \endcode
    */
   Value& operator[](const StaticString& key);
-#ifdef JSON_USE_CPPTL
-  /// Access an object value by name, create a null member if it does not exist.
-  Value& operator[](const CppTL::ConstString& key);
-  /// Access an object value by name, returns null if there is no member with
-  /// that name.
-  const Value& operator[](const CppTL::ConstString& key) const;
-#endif
   /// Return the member named key if it exist, defaultValue otherwise.
   /// \note deep copy
   Value get(const char* key, const Value& defaultValue) const;
@@ -517,11 +487,6 @@ public:
   /// \note deep copy
   /// \param key may contain embedded nulls.
   Value get(const String& key, const Value& defaultValue) const;
-#ifdef JSON_USE_CPPTL
-  /// Return the member named key if it exist, defaultValue otherwise.
-  /// \note deep copy
-  Value get(const CppTL::ConstString& key, const Value& defaultValue) const;
-#endif
   /// Most general and efficient version of isMember()const, get()const,
   /// and operator[]const
   /// \note As stated elsewhere, behavior is undefined if (end-begin) >= 2^30
@@ -567,10 +532,6 @@ public:
   bool isMember(const String& key) const;
   /// Same as isMember(String const& key)const
   bool isMember(const char* begin, const char* end) const;
-#ifdef JSON_USE_CPPTL
-  /// Return true if the object has a member named key.
-  bool isMember(const CppTL::ConstString& key) const;
-#endif
 
   /// \brief Return a list of the member names.
   ///
@@ -579,11 +540,6 @@ public:
   /// \post if type() was nullValue, it remains nullValue
   Members getMemberNames() const;
 
-  //# ifdef JSON_USE_CPPTL
-  //      EnumMemberNames enumMemberNames() const;
-  //      EnumValues enumValues() const;
-  //# endif
-
   /// \deprecated Always pass len.
   JSONCPP_DEPRECATED("Use setComment(String const&) instead.")
   void setComment(const char* comment, CommentPlacement placement) {
@@ -706,11 +662,6 @@ template <> inline float Value::as<float>() const { return asFloat(); }
 template <> inline const char* Value::as<const char*>() const {
   return asCString();
 }
-#ifdef JSON_USE_CPPTL
-template <> inline CppTL::ConstString Value::as<CppTL::ConstString>() const {
-  return asConstString();
-}
-#endif
 
 /** \brief Experimental and untested: represents an element of the "path" to
  * access a node.
@@ -960,4 +911,4 @@ inline void swap(Value& a, Value& b) { a.swap(b); }
 #pragma warning(pop)
 #endif // if defined(JSONCPP_DISABLE_DLL_INTERFACE_WARNING)
 
-#endif // CPPTL_JSON_H_INCLUDED
+#endif // JSON_H_INCLUDED
diff --git a/meson.build b/meson.build
index 8531dce..1bc94a8 100644
--- a/meson.build
+++ b/meson.build
@@ -21,7 +21,6 @@ project(
 jsoncpp_headers = [
   'include/json/allocator.h',
   'include/json/assertions.h',
-  'include/json/autolink.h',
   'include/json/config.h',
   'include/json/json_features.h',
   'include/json/forwards.h',
diff --git a/src/lib_json/json_value.cpp b/src/lib_json/json_value.cpp
index 00d28f7..9c48ab1 100644
--- a/src/lib_json/json_value.cpp
+++ b/src/lib_json/json_value.cpp
@@ -8,16 +8,13 @@
 #include <json/value.h>
 #include <json/writer.h>
 #endif // if !defined(JSON_IS_AMALGAMATION)
+#include <algorithm>
 #include <cassert>
 #include <cmath>
+#include <cstddef>
 #include <cstring>
 #include <sstream>
 #include <utility>
-#ifdef JSON_USE_CPPTL
-#include <cpptl/conststring.h>
-#endif
-#include <algorithm> // min()
-#include <cstddef>   // size_t
 
 // Provide implementation equivalent of std::snprintf for older _MSC compilers
 #if defined(_MSC_VER) && _MSC_VER < 1900
@@ -419,14 +416,6 @@ Value::Value(const StaticString& value) {
   value_.string_ = const_cast<char*>(value.c_str());
 }
 
-#ifdef JSON_USE_CPPTL
-Value::Value(const CppTL::ConstString& value) {
-  initBasic(stringValue, true);
-  value_.string_ = duplicateAndPrefixStringValue(
-      value, static_cast<unsigned>(value.length()));
-}
-#endif
-
 Value::Value(bool value) {
   initBasic(booleanValue);
   value_.bool_ = value;
@@ -654,15 +643,6 @@ String Value::asString() const {
   }
 }
 
-#ifdef JSON_USE_CPPTL
-CppTL::ConstString Value::asConstString() const {
-  unsigned len;
-  char const* str;
-  decodePrefixedString(isAllocated(), value_.string_, &len, &str);
-  return CppTL::ConstString(str, len);
-}
-#endif
-
 Value::Int Value::asInt() const {
   switch (type()) {
   case intValue:
@@ -1135,18 +1115,6 @@ Value& Value::operator[](const StaticString& key) {
   return resolveReference(key.c_str());
 }
 
-#ifdef JSON_USE_CPPTL
-Value& Value::operator[](const CppTL::ConstString& key) {
-  return resolveReference(key.c_str(), key.end_c_str());
-}
-Value const& Value::operator[](CppTL::ConstString const& key) const {
-  Value const* found = find(key.c_str(), key.end_c_str());
-  if (!found)
-    return nullSingleton();
-  return *found;
-}
-#endif
-
 Value& Value::append(const Value& value) { return append(Value(value)); }
 
 Value& Value::append(Value&& value) {
@@ -1240,13 +1208,6 @@ bool Value::removeIndex(ArrayIndex index, Value* removed) {
   return true;
 }
 
-#ifdef JSON_USE_CPPTL
-Value Value::get(const CppTL::ConstString& key,
-                 const Value& defaultValue) const {
-  return get(key.c_str(), key.end_c_str(), defaultValue);
-}
-#endif
-
 bool Value::isMember(char const* begin, char const* end) const {
   Value const* value = find(begin, end);
   return nullptr != value;
@@ -1258,12 +1219,6 @@ bool Value::isMember(String const& key) const {
   return isMember(key.data(), key.data() + key.length());
 }
 
-#ifdef JSON_USE_CPPTL
-bool Value::isMember(const CppTL::ConstString& key) const {
-  return isMember(key.c_str(), key.end_c_str());
-}
-#endif
-
 Value::Members Value::getMemberNames() const {
   JSON_ASSERT_MESSAGE(
       type() == nullValue || type() == objectValue,
@@ -1279,31 +1234,6 @@ Value::Members Value::getMemberNames() const {
   }
   return members;
 }
-//
-//# ifdef JSON_USE_CPPTL
-// EnumMemberNames
-// Value::enumMemberNames() const
-//{
-//   if ( type() == objectValue )
-//   {
-//      return CppTL::Enum::any(  CppTL::Enum::transform(
-//         CppTL::Enum::keys( *(value_.map_), CppTL::Type<const CZString &>() ),
-//         MemberNamesTransform() ) );
-//   }
-//   return EnumMemberNames();
-//}
-//
-//
-// EnumValues
-// Value::enumValues() const
-//{
-//   if ( type() == objectValue  ||  type() == arrayValue )
-//      return CppTL::Enum::anyValues( *(value_.map_),
-//                                     CppTL::Type<const Value &>() );
-//   return EnumValues();
-//}
-//
-//# endif
 
 static bool IsIntegral(double d) {
   double integral_part;
diff --git a/src/lib_json/json_valueiterator.inl b/src/lib_json/json_valueiterator.inl
index 9bd9315..d6128b8 100644
--- a/src/lib_json/json_valueiterator.inl
+++ b/src/lib_json/json_valueiterator.inl
@@ -30,9 +30,6 @@ void ValueIteratorBase::decrement() { --current_; }
 
 ValueIteratorBase::difference_type
 ValueIteratorBase::computeDistance(const SelfType& other) const {
-#ifdef JSON_USE_CPPTL_SMALLMAP
-  return other.current_ - current_;
-#else
   // Iterator for null value are initialized using the default
   // constructor, which initialize current_ to the default
   // std::map::iterator. As begin() and end() are two instance
@@ -53,7 +50,6 @@ ValueIteratorBase::computeDistance(const SelfType& other) const {
     ++myDistance;
   }
   return myDistance;
-#endif
 }
 
 bool ValueIteratorBase::isEqual(const SelfType& other) const {
diff --git a/src/test_lib_json/main.cpp b/src/test_lib_json/main.cpp
index f2e4d4c..d85a98b 100644
--- a/src/test_lib_json/main.cpp
+++ b/src/test_lib_json/main.cpp
@@ -3584,9 +3584,6 @@ JSONTEST_FIXTURE_LOCAL(MemberTemplateAs, BehavesSameAsNamedAs) {
   const Json::Value jstr = "hello world";
   JSONTEST_ASSERT_STRING_EQUAL(jstr.as<const char*>(), jstr.asCString());
   JSONTEST_ASSERT_STRING_EQUAL(jstr.as<Json::String>(), jstr.asString());
-#ifdef JSON_USE_CPPTL
-  JSONTEST_ASSERT_STRING_EQUAL(js.as<CppTL::ConstString>(), js.asConstString());
-#endif
   EqEval(Json::Int(64), [](const Json::Value& j) { return j.asInt(); });
   EqEval(Json::UInt(64), [](const Json::Value& j) { return j.asUInt(); });
 #if defined(JSON_HAS_INT64)