diff --git a/Unreal/GameDatabase.cpp b/Unreal/GameDatabase.cpp
index 08165b9a..9d01e228 100644
--- a/Unreal/GameDatabase.cpp
+++ b/Unreal/GameDatabase.cpp
@@ -912,6 +912,7 @@ static const int ue4Versions[] =
 	VER_UE4_5, VER_UE4_6, VER_UE4_7, VER_UE4_8, VER_UE4_9,
 	VER_UE4_10, VER_UE4_11, VER_UE4_12, VER_UE4_13, VER_UE4_14,
 	VER_UE4_15, VER_UE4_16, VER_UE4_17, VER_UE4_18, VER_UE4_19,
+	VER_UE4_20,
 	// NEW_ENGINE_VERSION
 };
 
diff --git a/Unreal/UnCore.h b/Unreal/UnCore.h
index 5511c964..30f5d3e4 100644
--- a/Unreal/UnCore.h
+++ b/Unreal/UnCore.h
@@ -395,7 +395,7 @@ enum EGame
 	GAME_ENGINE    = 0xFFF0000	// mask for game engine
 };
 
-#define LATEST_SUPPORTED_UE4_VERSION		19		// UE4.XX
+#define LATEST_SUPPORTED_UE4_VERSION		20		// UE4.XX
 
 enum EPlatform
 {
@@ -1165,7 +1165,18 @@ struct FPackedNormal
 
 	friend FArchive& operator<<(FArchive &Ar, FPackedNormal &N)
 	{
-		return Ar << N.Data;
+		Ar << N.Data;
+#if UNREAL4
+		if (Ar.Game >= GAME_UE4(20))
+		{
+			// UE4.20 no longer has offset, it uses conversion from int16 to float instead of uint16 to float
+			//?? TODO: possible const: FRenderingObjectVersion::IncreaseNormalPrecision
+			//?? TODO: review, may be use new PackedNormal format for UE code, it is compatible with CPackedNormal
+			//?? (will need to change CVT function for it)
+			N.Data ^= 0x80808080;
+		}
+#endif // UNREAL4
+		return Ar;
 	}
 
 	operator FVector() const
@@ -1220,7 +1231,19 @@ struct FPackedRGBA16N
 
 	friend FArchive& operator<<(FArchive &Ar, FPackedRGBA16N &V)
 	{
-		return Ar << V.X << V.Y << V.Z << V.W;
+		Ar << V.X << V.Y << V.Z << V.W;
+		if (Ar.Game >= GAME_UE4(20))
+		{
+			// UE4.20 no longer has offset, it uses conversion from int16 to float instead of uint16 to float
+			//?? TODO: possible const: FRenderingObjectVersion::IncreaseNormalPrecision
+			//?? TODO: review, may be use new PackedNormal format for UE code, it is compatible with CPackedNormal
+			//?? (will need to change CVT function for it)
+			V.X ^= 0x8000;
+			V.Y ^= 0x8000;
+			V.Z ^= 0x8000;
+			V.W ^= 0x8000;
+		}
+		return Ar;
 	}
 };
 
@@ -1341,11 +1364,11 @@ SIMPLE_TYPE(FVector4, float)
 SIMPLE_TYPE(FQuat,    float)
 SIMPLE_TYPE(FCoords,  float)
 SIMPLE_TYPE(FColor,   byte)
-SIMPLE_TYPE(FPackedNormal, uint32)
+//SIMPLE_TYPE(FPackedNormal, uint32) - has complex serialization
 
 #if UNREAL4
 
-SIMPLE_TYPE(FPackedRGBA16N, uint16)
+//SIMPLE_TYPE(FPackedRGBA16N, uint16) - has complex serialization
 SIMPLE_TYPE(FIntPoint,  int)
 SIMPLE_TYPE(FIntVector, int)
 SIMPLE_TYPE(FVector2D,  float)
@@ -2435,6 +2458,7 @@ enum
 	VER_UE4_18 = 514,
 		VER_UE4_ADDED_PACKAGE_SUMMARY_LOCALIZATION_ID = 516,
 	VER_UE4_19 = 516,
+	VER_UE4_20 = 516,
 	// look for NEW_ENGINE_VERSION over the code to find places where version constants should be inserted.
 	// LATEST_SUPPORTED_UE4_VERSION should be updated too.
 };
@@ -2460,6 +2484,7 @@ struct FFrameworkObjectVersion
 		// UE4.17 = 28
 		// UE4.18 = 30
 		// UE4.19 = 33
+		// UE4.20 = 34
 
 		VersionPlusOne,
 		LatestVersion = VersionPlusOne - 1
@@ -2494,6 +2519,8 @@ struct FFrameworkObjectVersion
 			return (Type)30;
 		if (Ar.Game < GAME_UE4(20))
 			return (Type)33;
+		if (Ar.Game < GAME_UE4(21))
+			return (Type)34;
 		// NEW_ENGINE_VERSION
 		return LatestVersion;
 	}
@@ -2513,6 +2540,7 @@ struct FEditorObjectVersion
 		// UE4.16 = 17
 		// UE4.17, UE4.18 = 20
 		// UE4.19 = 23
+		// UE4.20 = 24
 
 		VersionPlusOne,
 		LatestVersion = VersionPlusOne - 1
@@ -2545,6 +2573,8 @@ struct FEditorObjectVersion
 			return (Type)20;
 		if (Ar.Game < GAME_UE4(20))
 			return (Type)23;
+		if (Ar.Game < GAME_UE4(21))
+			return (Type)24;
 		// NEW_ENGINE_VERSION
 		return LatestVersion;
 	}
@@ -2574,6 +2604,7 @@ struct FSkeletalMeshCustomVersion
 		RemoveDuplicatedClothingSections = 14,
 		DeprecateSectionDisabledFlag = 15,
 		// UE4.19 = 15
+		// UE4.20 = 16
 
 		VersionPlusOne,
 		LatestVersion = VersionPlusOne - 1
@@ -2603,6 +2634,8 @@ struct FSkeletalMeshCustomVersion
 			return CompactClothVertexBuffer;
 		if (Ar.Game < GAME_UE4(20))
 			return DeprecateSectionDisabledFlag;
+		if (Ar.Game < GAME_UE4(21))
+			return (Type)16;
 		// NEW_ENGINE_VERSION
 		return LatestVersion;
 	}
@@ -2619,6 +2652,8 @@ struct FRenderingObjectVersion
 		// UE4.17 = 19
 		// UE4.18 = 20
 		// UE4.19 = 25
+		// UE4.20
+		IncreaseNormalPrecision = 26,
 
 		VersionPlusOne,
 		LatestVersion = VersionPlusOne - 1
@@ -2651,6 +2686,8 @@ struct FRenderingObjectVersion
 			return (Type)20;
 		if (Ar.Game < GAME_UE4(20))
 			return (Type)25;
+		if (Ar.Game < GAME_UE4(21))
+			return IncreaseNormalPrecision;
 		// NEW_ENGINE_VERSION
 		return LatestVersion;
 	}
@@ -2668,6 +2705,7 @@ struct FAnimPhysObjectVersion
 		// UE4.18 = 12
 		AddLODToCurveMetaData = 12,
 		// UE4.19 = 16
+		// UE4.20 = 17
 		VersionPlusOne,
 		LatestVersion = VersionPlusOne - 1
 	};
@@ -2688,6 +2726,8 @@ struct FAnimPhysObjectVersion
 			return AddLODToCurveMetaData;
 		if (Ar.Game < GAME_UE4(20))
 			return (Type)16;
+		if (Ar.Game < GAME_UE4(21))
+			return (Type)17;
 		// NEW_ENGINE_VERSION
 		return LatestVersion;
 	}
diff --git a/Unreal/UnTexture4.cpp b/Unreal/UnTexture4.cpp
index 29f9d18d..1be8110c 100644
--- a/Unreal/UnTexture4.cpp
+++ b/Unreal/UnTexture4.cpp
@@ -38,6 +38,11 @@ void FTexture2DMipMap::Serialize4(FArchive &Ar, FTexture2DMipMap& Mip)
 	//?? with reading 4-byte ints at different locations.
 	Mip.Data.Serialize(Ar);
 	Ar << Mip.SizeX << Mip.SizeY;
+	if (Ar.Game >= GAME_UE4(20))
+	{
+		int32 SizeZ;
+		Ar << SizeZ;
+	}
 	if (Ar.ArVer >= VER_UE4_TEXTURE_DERIVED_DATA2 && !cooked)
 	{
 		FString DerivedDataKey;
@@ -144,6 +149,13 @@ void UTexture2D::Serialize4(FArchive& Ar)
 		{
 			int32 SkipOffset;
 			Ar << SkipOffset;
+			if (Ar.Game >= GAME_UE4(20))
+			{
+				int32 SkipOffsetH;
+				Ar << SkipOffsetH;
+				assert(SkipOffsetH == 0);
+			}
+
 			EPixelFormat PixelFormat = (EPixelFormat)NameToEnum("EPixelFormat", PixelFormatEnum);
 
 			if (Format == PF_Unknown)
diff --git a/readme.txt b/readme.txt
index 121d1f0b..7d52ce2c 100644
--- a/readme.txt
+++ b/readme.txt
@@ -199,8 +199,11 @@ detex
 
 Changes
 ~~~~~~~
+16.07.2018
+- updated UE4.20 support
+
 15.07.2018
-- make package selection and package version report windows resizable
+- package selection and package version report windows are now resizable
 
 11.07.2018
 - exporting a .props.txt file next to .mat, it contains all material's properties
diff --git a/test.sh b/test.sh
index bc2edaed..d88cf1e6 100644
--- a/test.sh
+++ b/test.sh
@@ -172,7 +172,7 @@ function paragon()
 function fortnite()
 {
 	CheckDir C:/3-UnrealEngine/Fortnite/FortniteGame/Content/Paks
-	run -game=ue4.19 $*
+	run -game=ue4.20 $*
 }
 function ue3()
 {
diff --git a/umodel b/umodel
index 31024a60..1b32a595 100644
Binary files a/umodel and b/umodel differ
diff --git a/umodel.exe b/umodel.exe
index 24b6d056..b62e90ad 100644
Binary files a/umodel.exe and b/umodel.exe differ