diff --git a/toonz/sources/common/trop/tdistancetransform.cpp b/toonz/sources/common/trop/tdistancetransform.cpp
index 0e16f62..f6175e5 100644
--- a/toonz/sources/common/trop/tdistancetransform.cpp
+++ b/toonz/sources/common/trop/tdistancetransform.cpp
@@ -1,13 +1,10 @@
-
+#include <memory>
 
 #include "tropcm.h"
 
 // TnzCore includes
 #include "traster.h"
 
-// boost includes
-#include <boost/scoped_array.hpp>
-
 // STD includes
 #include <limits>
 
@@ -113,7 +110,7 @@ void expand(int lineLength, int linesCount,
 	// Allocate a buffer equivalent to a dt line. It will store the original
 	// dt values. Final dt values will be written directly on the dt raster.
 	// This is necessary since read and write intervals overlap.
-	boost::scoped_array<unsigned int> dtOriginalLine(new unsigned int[lineLength]);
+	std::unique_ptr<unsigned[]> dtOriginalLine(new unsigned[lineLength]);
 
 	unsigned int *odtLineStart = dtOriginalLine.get(),
 				 *odtLineEnd = odtLineStart + lineLength;
diff --git a/toonz/sources/include/ext/ttexturesstorage.h b/toonz/sources/include/ext/ttexturesstorage.h
index 94beb45..b97a373 100644
--- a/toonz/sources/include/ext/ttexturesstorage.h
+++ b/toonz/sources/include/ext/ttexturesstorage.h
@@ -1,17 +1,14 @@
-
-
 #ifndef DRAWABLEMESHIMAGE_H
 #define DRAWABLEMESHIMAGE_H
 
+#include <memory>
+
 // TnzExt includes
 #include "meshtexturizer.h"
 
 // TnzCore includes
 #include "tgldisplaylistsmanager.h"
 
-// Boost includes
-#include <boost/shared_ptr.hpp>
-
 #undef DVAPI
 #undef DVVAR
 #ifdef TNZEXT_EXPORTS
@@ -48,7 +45,7 @@ private:
 	DrawableTextureData &operator=(const DrawableTextureData &);
 };
 
-typedef boost::shared_ptr<DrawableTextureData> DrawableTextureDataP;
+typedef std::shared_ptr<DrawableTextureData> DrawableTextureDataP;
 
 //***************************************************************************************
 //    TexturesStorage declaration
diff --git a/toonz/sources/include/tools/strokeselection.h b/toonz/sources/include/tools/strokeselection.h
index a6391ca..fb5265a 100644
--- a/toonz/sources/include/tools/strokeselection.h
+++ b/toonz/sources/include/tools/strokeselection.h
@@ -1,8 +1,8 @@
-
-
 #ifndef STROKE_SELECTION_H
 #define STROKE_SELECTION_H
 
+#include <memory>
+
 // TnzQt includes
 #include "toonzqt/selection.h"
 
@@ -10,9 +10,6 @@
 #include "tcommon.h"
 #include "tvectorimage.h"
 
-// boost includes
-#include <boost/scoped_ptr.hpp>
-
 // STD includes
 #include <set>
 
@@ -88,7 +85,7 @@ private:
 	TVectorImageP m_vi;			//!< Selected vector image.
 	IndexesContainer m_indexes; //!< Selected stroke indexes in m_vi.
 
-	boost::scoped_ptr<TGroupCommand> m_groupCommand; //!< Groups commands wrapper.
+	std::unique_ptr<TGroupCommand> m_groupCommand; //!< Groups commands wrapper.
 	TSceneHandle *m_sceneHandle;					 //!< Global scene handle. \deprecated  Use TApplication instead.
 
 	/*!Set this boolean to true before call tool->notifyImageChanged() when you want to reset strokes bbox.
diff --git a/toonz/sources/include/toonz/preferences.h b/toonz/sources/include/toonz/preferences.h
index 70bcb27..045d1df 100644
--- a/toonz/sources/include/toonz/preferences.h
+++ b/toonz/sources/include/toonz/preferences.h
@@ -1,8 +1,8 @@
-
-
 #ifndef PREFERENCES_H
 #define PREFERENCES_H
 
+#include <memory>
+
 // TnzCore includes
 #include "tcommon.h"
 #include "tgeometry.h"
@@ -17,9 +17,6 @@
 #include <QMap>
 #include <QRegExp>
 
-// boost includes
-#include <boost/scoped_ptr.hpp>
-
 #undef DVAPI
 #undef DVVAR
 #ifdef TOONZLIB_EXPORTS
@@ -431,7 +428,7 @@ public:
 	void startAutoSave();
 
 private:
-	boost::scoped_ptr<QSettings> m_settings;
+	std::unique_ptr<QSettings> m_settings;
 
 	QMap<int, QString> m_languageMaps,
 		m_styleSheetMaps;
diff --git a/toonz/sources/include/toonz/txshsimplelevel.h b/toonz/sources/include/toonz/txshsimplelevel.h
index 2774172..93eadb1 100644
--- a/toonz/sources/include/toonz/txshsimplelevel.h
+++ b/toonz/sources/include/toonz/txshsimplelevel.h
@@ -1,8 +1,8 @@
-
-
 #ifndef TXSHSIMPLELEVEL_INCLUDED
 #define TXSHSIMPLELEVEL_INCLUDED
 
+#include <memory>
+
 // TnzLib includes
 #include "toonz/txshlevel.h"
 #include "toonz/txshleveltypes.h"
@@ -17,7 +17,6 @@
 #include <QStringList>
 
 // boost includes
-#include <boost/scoped_ptr.hpp>
 #include <boost/container/flat_set.hpp>
 #include <boost/container/flat_map.hpp>
 
@@ -322,10 +321,8 @@ private:
 	typedef boost::container::flat_set<TFrameId> FramesSet;
 
 private:
-	boost::
-		scoped_ptr<LevelProperties> m_properties;
-	boost::
-		scoped_ptr<TContentHistory> m_contentHistory;
+	std::unique_ptr<LevelProperties> m_properties;
+	std::unique_ptr<TContentHistory> m_contentHistory;
 
 	TPalette *m_palette;
 
diff --git a/toonz/sources/tnzext/meshtexturizer.cpp b/toonz/sources/tnzext/meshtexturizer.cpp
index 576c202..2489872 100644
--- a/toonz/sources/tnzext/meshtexturizer.cpp
+++ b/toonz/sources/tnzext/meshtexturizer.cpp
@@ -1,4 +1,4 @@
-
+#include <memory>
 
 #include "ext/meshtexturizer.h"
 
@@ -15,10 +15,6 @@
 #include "tcg/tcg_list.h"
 #include "tcg/tcg_misc.h"
 
-// Boost includes
-#include <boost/shared_ptr.hpp>
-#include <boost/make_shared.hpp>
-
 #define COPIED_BORDER 1								 // Amount of tile border from the original image
 #define TRANSP_BORDER 1								 // Amount of transparent tile border
 #define NONPREM_BORDER 1							 // Amount of nonpremultiplied copied transparent border
@@ -39,7 +35,7 @@ class MeshTexturizer::Imp
 
 public:
 	QReadWriteLock m_lock;									  //!< Lock for synchronized access
-	tcg::list<boost::shared_ptr<TextureData>> m_textureDatas; //!< Pool of texture datas
+	tcg::list<std::shared_ptr<TextureData>> m_textureDatas; //!< Pool of texture datas
 
 public:
 	Imp() : m_lock(QReadWriteLock::Recursive) {}
@@ -232,7 +228,7 @@ int MeshTexturizer::bindTexture(const TRaster32P &ras, const TRectD &geom,
 	glGetIntegerv(GL_UNPACK_ALIGNMENT, &alignment);
 
 	// Initialize a new texture data
-	int dataIdx = m_imp->m_textureDatas.push_back(boost::make_shared<TextureData>(geom));
+	int dataIdx = m_imp->m_textureDatas.push_back(std::make_shared<TextureData>(geom));
 
 	// Textures must have 2-power sizes. So, let's start with the smallest 2 power
 	// >= ras's sizes.
diff --git a/toonz/sources/tnzext/plasticdeformerstorage.cpp b/toonz/sources/tnzext/plasticdeformerstorage.cpp
index 8960aa3..b0262ed 100644
--- a/toonz/sources/tnzext/plasticdeformerstorage.cpp
+++ b/toonz/sources/tnzext/plasticdeformerstorage.cpp
@@ -1,4 +1,4 @@
-
+#include <memory>
 
 // TnzExt includes
 #include "ext/plasticskeleton.h"
@@ -10,9 +10,6 @@
 #include <algorithm>
 
 // Boost includes
-#include <boost/shared_ptr.hpp>
-#include <boost/make_shared.hpp>
-
 #include <boost/multi_index_container.hpp>
 #include <boost/multi_index/ordered_index.hpp>
 #include <boost/multi_index/member.hpp>
@@ -42,7 +39,7 @@ struct Key {
 	const TMeshImage *m_mi;
 	DeformedSkeleton m_ds;
 
-	boost::shared_ptr<DataGroup> m_dataGroup;
+	std::shared_ptr<DataGroup> m_dataGroup;
 
 public:
 	Key(const TMeshImage *mi, const SkD *sd, int skelId)
@@ -472,7 +469,7 @@ PlasticDeformerDataGroup *PlasticDeformerStorage::deformerData(
 	DeformersByKey::iterator dt = m_imp->m_deformers.find(key);
 	if (dt == m_imp->m_deformers.end()) {
 		// No deformer was found. Allocate it.
-		key.m_dataGroup = boost::make_shared<PlasticDeformerDataGroup>();
+		key.m_dataGroup = std::make_shared<PlasticDeformerDataGroup>();
 		initializeDeformersData(key.m_dataGroup.get(), meshImage);
 
 		dt = m_imp->m_deformers.insert(key).first;
diff --git a/toonz/sources/tnzext/ttexturesstorage.cpp b/toonz/sources/tnzext/ttexturesstorage.cpp
index 48e047e..7d369ae 100644
--- a/toonz/sources/tnzext/ttexturesstorage.cpp
+++ b/toonz/sources/tnzext/ttexturesstorage.cpp
@@ -1,4 +1,4 @@
-
+#include <memory>
 
 // TnzCore includes
 #include "tgl.h"
@@ -9,9 +9,6 @@
 // tcg includes
 #include "tcg/tcg_list.h"
 
-// Boost includes
-#include <boost/make_shared.hpp>
-
 // Qt includes
 #include <QString>
 #include <QCache>
@@ -150,7 +147,7 @@ DrawableTextureDataP TTexturesStorage::loadTexture(
 
 	MeshTexturizer &texturizer = it->second->m_texturizer;
 
-	DrawableTextureDataP dataPtr = boost::make_shared<DrawableTextureData>();
+	DrawableTextureDataP dataPtr = std::make_shared<DrawableTextureData>();
 	DrawableTextureData *data = dataPtr.get();
 
 	data->m_dlSpaceId = dlSpaceId;
diff --git a/toonz/sources/toonz/cleanuppopup.h b/toonz/sources/toonz/cleanuppopup.h
index cef7ffd..349cd3a 100644
--- a/toonz/sources/toonz/cleanuppopup.h
+++ b/toonz/sources/toonz/cleanuppopup.h
@@ -1,8 +1,8 @@
-
-
 #ifndef CLEANUPPOPUP_H
 #define CLEANUPPOPUP_H
 
+#include <memory>
+
 // TnzQt includes
 #include "toonzqt/validatedchoicedialog.h"
 
@@ -11,7 +11,6 @@
 #include "timage.h"
 
 // boost includes
-#include <boost/scoped_ptr.hpp>
 #include <boost/container/vector.hpp>
 
 #include <QMap>
@@ -73,7 +72,7 @@ private:
 	QPushButton *m_cleanupButton;
 	QPushButton *m_skipButton;
 
-	boost::scoped_ptr<LevelUpdater>
+	std::unique_ptr<LevelUpdater>
 		m_updater; //!< The cleanup level updater.
 
 	bc::vector<CleanupLevel> m_cleanupLevels; //!< List of levels to be cleanupped.
@@ -84,10 +83,10 @@ private:
 
 	std::vector<TFrameId> m_cleanuppedLevelFrames; //!< Current level's list of cleanupped frames. Used
 												   //!  to selectively build the level's unpainted backup.
-	boost::scoped_ptr<CleanupParameters>
+	std::unique_ptr<CleanupParameters>
 		m_params; //!< Cleanup params used to cleanup.
 
-	boost::scoped_ptr<OverwriteDialog>
+	std::unique_ptr<OverwriteDialog>
 		m_overwriteDialog; //!< Dialog about level overwriting options.
 
 	/*	Palette上書きの判断をするために、保存先Levelが既に存在するかどうかのフラグ
diff --git a/toonz/sources/toonz/iocommand.cpp b/toonz/sources/toonz/iocommand.cpp
index 48396dc..8ab77b4 100644
--- a/toonz/sources/toonz/iocommand.cpp
+++ b/toonz/sources/toonz/iocommand.cpp
@@ -1,4 +1,4 @@
-
+#include <memory>
 
 #include "iocommand.h"
 
@@ -2177,7 +2177,7 @@ int loadPSDResource(IoCmd::LoadResourceArguments &args, bool updateRecentFile, P
 typedef IoCmd::LoadResourceArguments::ScopedBlock LoadScopedBlock;
 
 struct LoadScopedBlock::Data {
-	boost::scoped_ptr<DVGui::ProgressDialog>
+	std::unique_ptr<DVGui::ProgressDialog>
 		m_progressDialog; //!< Progress dialog displayed on multiple paths.
 	int m_loadedCount;	//!< Number of loaded levels.
 	bool m_hasSoundLevel; //!< Whether a sound level was loaded.
diff --git a/toonz/sources/toonz/iocommand.h b/toonz/sources/toonz/iocommand.h
index c8b4591..825b8ad 100644
--- a/toonz/sources/toonz/iocommand.h
+++ b/toonz/sources/toonz/iocommand.h
@@ -1,8 +1,8 @@
-
-
 #ifndef IOCOMMAND_H
 #define IOCOMMAND_H
 
+#include <memory>
+
 // TnzLib includes
 #include "toonz/preferences.h"
 
@@ -14,7 +14,6 @@
 #include <QDialog>
 
 // boost includes
-#include <boost/scoped_ptr.hpp>
 #include <boost/optional.hpp>
 
 // STD includes
@@ -73,7 +72,7 @@ struct LoadResourceArguments {
 		Data &data() const { return *m_data; } //!< Internal data used by the loading procedure.
 
 	private:
-		boost::scoped_ptr<Data> m_data;
+		std::unique_ptr<Data> m_data;
 	};
 
 	struct ResourceData //!  Data about a single resource to be loaded.
diff --git a/toonz/sources/toonz/vectorizerpopup.h b/toonz/sources/toonz/vectorizerpopup.h
index 7de3e4a..75cf3c1 100644
--- a/toonz/sources/toonz/vectorizerpopup.h
+++ b/toonz/sources/toonz/vectorizerpopup.h
@@ -1,8 +1,8 @@
-
-
 #ifndef VECTORIZERPOPUP_H
 #define VECTORIZERPOPUP_H
 
+#include <memory>
+
 // TnzCore includes
 #include "tvectorimage.h"
 
@@ -13,9 +13,6 @@
 // TnzQt includes
 #include "toonzqt/dvdialog.h"
 
-// boost includes
-#include <boost/scoped_ptr.hpp>
-
 // Qt includes
 #include <QWidget>
 #include <QThread>
@@ -301,7 +298,7 @@ private:
 	TXshSimpleLevelP m_vLevel;	//!< Output vectorized level
 	std::vector<TFrameId> m_fids; //!< Frame ids of the input \b m_level
 
-	boost::scoped_ptr<OverwriteDialog>
+	std::unique_ptr<OverwriteDialog>
 		m_dialog; //!< Dialog to be shown for overwrite resolution.
 
 	bool m_isCanceled, //!< User cancels set this flag to true