diff --git a/lzma/C/7zArcIn.c b/lzma/C/7zArcIn.c
index f1f4d51827..f74d0fad51 100644
--- a/lzma/C/7zArcIn.c
+++ b/lzma/C/7zArcIn.c
@@ -1,5 +1,5 @@
 /* 7zArcIn.c -- 7z Input functions
-2018-07-04 : Igor Pavlov : Public domain */
+2018-12-31 : Igor Pavlov : Public domain */
 
 #include "Precomp.h"
 
@@ -19,7 +19,7 @@
   { MY_ALLOC(Byte, to, size, alloc); memcpy(to, from, size); }
 
 #define MY_ALLOC_ZE_AND_CPY(to, size, from, alloc) \
-  { if ((size) == 0) p = NULL; else { MY_ALLOC_AND_CPY(to, size, from, alloc) } }
+  { if ((size) == 0) to = NULL; else { MY_ALLOC_AND_CPY(to, size, from, alloc) } }
 
 #define k7zMajorVersion 0
 
@@ -666,7 +666,7 @@ static SRes ReadUnpackInfo(CSzAr *p,
   MY_ALLOC(size_t, p->FoCodersOffsets, (size_t)numFolders + 1, alloc);
   MY_ALLOC(UInt32, p->FoStartPackStreamIndex, (size_t)numFolders + 1, alloc);
   MY_ALLOC(UInt32, p->FoToCoderUnpackSizes, (size_t)numFolders + 1, alloc);
-  MY_ALLOC(Byte, p->FoToMainUnpackSizeIndex, (size_t)numFolders, alloc);
+  MY_ALLOC_ZE(Byte, p->FoToMainUnpackSizeIndex, (size_t)numFolders, alloc);
   
   startBufPtr = sd.Data;
   
diff --git a/lzma/C/7zDec.c b/lzma/C/7zDec.c
index 2628a70f32..7c46352111 100644
--- a/lzma/C/7zDec.c
+++ b/lzma/C/7zDec.c
@@ -1,5 +1,5 @@
 /* 7zDec.c -- Decoding from 7z folder
-2018-07-04 : Igor Pavlov : Public domain */
+2019-02-02 : Igor Pavlov : Public domain */
 
 #include "Precomp.h"
 
@@ -156,7 +156,7 @@ static SRes SzDecodeLzma(const Byte *props, unsigned propsSize, UInt64 inSize, I
     {
       SizeT inProcessed = (SizeT)lookahead, dicPos = state.dicPos;
       ELzmaStatus status;
-      res = LzmaDec_DecodeToDic(&state, outSize, inBuf, &inProcessed, LZMA_FINISH_END, &status);
+      res = LzmaDec_DecodeToDic(&state, outSize, (const Byte *)inBuf, &inProcessed, LZMA_FINISH_END, &status);
       lookahead -= inProcessed;
       inSize -= inProcessed;
       if (res != SZ_OK)
@@ -218,7 +218,7 @@ static SRes SzDecodeLzma2(const Byte *props, unsigned propsSize, UInt64 inSize,
     {
       SizeT inProcessed = (SizeT)lookahead, dicPos = state.decoder.dicPos;
       ELzmaStatus status;
-      res = Lzma2Dec_DecodeToDic(&state, outSize, inBuf, &inProcessed, LZMA_FINISH_END, &status);
+      res = Lzma2Dec_DecodeToDic(&state, outSize, (const Byte *)inBuf, &inProcessed, LZMA_FINISH_END, &status);
       lookahead -= inProcessed;
       inSize -= inProcessed;
       if (res != SZ_OK)
diff --git a/lzma/C/7zVersion.h b/lzma/C/7zVersion.h
index a486e424ff..c176823a4d 100644
--- a/lzma/C/7zVersion.h
+++ b/lzma/C/7zVersion.h
@@ -1,7 +1,7 @@
-#define MY_VER_MAJOR 18
-#define MY_VER_MINOR 06
+#define MY_VER_MAJOR 19
+#define MY_VER_MINOR 00
 #define MY_VER_BUILD 0
-#define MY_VERSION_NUMBERS "18.06"
+#define MY_VERSION_NUMBERS "19.00"
 #define MY_VERSION MY_VERSION_NUMBERS
 
 #ifdef MY_CPU_NAME
@@ -10,7 +10,7 @@
   #define MY_VERSION_CPU MY_VERSION
 #endif
 
-#define MY_DATE "2018-12-30"
+#define MY_DATE "2019-02-21"
 #undef MY_COPYRIGHT
 #undef MY_VERSION_COPYRIGHT_DATE
 #define MY_AUTHOR_NAME "Igor Pavlov"
diff --git a/lzma/C/CpuArch.c b/lzma/C/CpuArch.c
index 962eb780e3..02e482e088 100644
--- a/lzma/C/CpuArch.c
+++ b/lzma/C/CpuArch.c
@@ -1,5 +1,5 @@
 /* CpuArch.c -- CPU specific code
-2018-07-04: Igor Pavlov : Public domain */
+2018-02-18: Igor Pavlov : Public domain */
 
 #include "Precomp.h"
 
@@ -197,4 +197,22 @@ BoolInt CPU_Is_Aes_Supported()
   return (p.c >> 25) & 1;
 }
 
+BoolInt CPU_IsSupported_PageGB()
+{
+  Cx86cpuid cpuid;
+  if (!x86cpuid_CheckAndRead(&cpuid))
+    return False;
+  {
+    UInt32 d[4] = { 0 };
+    MyCPUID(0x80000000, &d[0], &d[1], &d[2], &d[3]);
+    if (d[0] < 0x80000001)
+      return False;
+  }
+  {
+    UInt32 d[4] = { 0 };
+    MyCPUID(0x80000001, &d[0], &d[1], &d[2], &d[3]);
+    return (d[3] >> 26) & 1;
+  }
+}
+
 #endif
diff --git a/lzma/C/CpuArch.h b/lzma/C/CpuArch.h
index fdc114b8f5..bd42938802 100644
--- a/lzma/C/CpuArch.h
+++ b/lzma/C/CpuArch.h
@@ -1,5 +1,5 @@
 /* CpuArch.h -- CPU specific code
-2018-07-04 : Igor Pavlov : Public domain */
+2018-02-18 : Igor Pavlov : Public domain */
 
 #ifndef __CPU_ARCH_H
 #define __CPU_ARCH_H
@@ -327,6 +327,7 @@ int x86cpuid_GetFirm(const Cx86cpuid *p);
 
 BoolInt CPU_Is_InOrder();
 BoolInt CPU_Is_Aes_Supported();
+BoolInt CPU_IsSupported_PageGB();
 
 #endif
 
diff --git a/lzma/C/Lzma2Dec.c b/lzma/C/Lzma2Dec.c
index b0af5b0fd3..4e138a4aef 100644
--- a/lzma/C/Lzma2Dec.c
+++ b/lzma/C/Lzma2Dec.c
@@ -1,5 +1,5 @@
 /* Lzma2Dec.c -- LZMA2 Decoder
-2018-07-04 : Igor Pavlov : Public domain */
+2019-02-02 : Igor Pavlov : Public domain */
 
 /* #define SHOW_DEBUG_INFO */
 
@@ -314,15 +314,15 @@ ELzma2ParseStatus Lzma2Dec_Parse(CLzma2Dec *p,
   while (p->state != LZMA2_STATE_ERROR)
   {
     if (p->state == LZMA2_STATE_FINISHED)
-      return LZMA_STATUS_FINISHED_WITH_MARK;
+      return (ELzma2ParseStatus)LZMA_STATUS_FINISHED_WITH_MARK;
 
     if (outSize == 0 && !checkFinishBlock)
-      return LZMA_STATUS_NOT_FINISHED;
+      return (ELzma2ParseStatus)LZMA_STATUS_NOT_FINISHED;
     
     if (p->state != LZMA2_STATE_DATA && p->state != LZMA2_STATE_DATA_CONT)
     {
       if (*srcLen == inSize)
-        return LZMA_STATUS_NEEDS_MORE_INPUT;
+        return (ELzma2ParseStatus)LZMA_STATUS_NEEDS_MORE_INPUT;
       (*srcLen)++;
 
       p->state = Lzma2Dec_UpdateState(p, *src++);
@@ -344,7 +344,7 @@ ELzma2ParseStatus Lzma2Dec_Parse(CLzma2Dec *p,
         // checkFinishBlock is true. So we expect that block must be finished,
         // We can return LZMA_STATUS_NOT_SPECIFIED or LZMA_STATUS_NOT_FINISHED here
         // break;
-        return LZMA_STATUS_NOT_FINISHED;
+        return (ELzma2ParseStatus)LZMA_STATUS_NOT_FINISHED;
       }
 
       if (p->state == LZMA2_STATE_DATA)
@@ -354,7 +354,7 @@ ELzma2ParseStatus Lzma2Dec_Parse(CLzma2Dec *p,
     }
 
     if (outSize == 0)
-      return LZMA_STATUS_NOT_FINISHED;
+      return (ELzma2ParseStatus)LZMA_STATUS_NOT_FINISHED;
 
     {
       SizeT inCur = inSize - *srcLen;
@@ -362,7 +362,7 @@ ELzma2ParseStatus Lzma2Dec_Parse(CLzma2Dec *p,
       if (LZMA2_IS_UNCOMPRESSED_STATE(p))
       {
         if (inCur == 0)
-          return LZMA_STATUS_NEEDS_MORE_INPUT;
+          return (ELzma2ParseStatus)LZMA_STATUS_NEEDS_MORE_INPUT;
         if (inCur > p->unpackSize)
           inCur = p->unpackSize;
         if (inCur > outSize)
@@ -381,7 +381,7 @@ ELzma2ParseStatus Lzma2Dec_Parse(CLzma2Dec *p,
         if (inCur == 0)
         {
           if (p->packSize != 0)
-            return LZMA_STATUS_NEEDS_MORE_INPUT;
+            return (ELzma2ParseStatus)LZMA_STATUS_NEEDS_MORE_INPUT;
         }
         else if (p->state == LZMA2_STATE_DATA)
         {
@@ -418,7 +418,7 @@ ELzma2ParseStatus Lzma2Dec_Parse(CLzma2Dec *p,
   }
   
   p->state = LZMA2_STATE_ERROR;
-  return LZMA_STATUS_NOT_SPECIFIED;
+  return (ELzma2ParseStatus)LZMA_STATUS_NOT_SPECIFIED;
 }
 
 
diff --git a/lzma/C/LzmaEnc.c b/lzma/C/LzmaEnc.c
index d78dbe121f..46a0db000f 100644
--- a/lzma/C/LzmaEnc.c
+++ b/lzma/C/LzmaEnc.c
@@ -1,5 +1,5 @@
 /* LzmaEnc.c -- LZMA Encoder
-2018-12-29: Igor Pavlov : Public domain */
+2019-01-10: Igor Pavlov : Public domain */
 
 #include "Precomp.h"
 
@@ -1497,9 +1497,9 @@ static unsigned GetOptimum(CLzmaEnc *p, UInt32 position)
 
     // here we can allow skip_items in p->opt, if we don't check (nextOpt->price < kInfinityPrice)
     // 18.new.06
-    if (nextOpt->price < kInfinityPrice
+    if ((nextOpt->price < kInfinityPrice
         // && !IsLitState(state)
-        && matchByte == curByte
+        && matchByte == curByte)
         || litPrice > nextOpt->price
         )
       litPrice = 0;
diff --git a/lzma/DOC/lzma-history.txt b/lzma/DOC/lzma-history.txt
index 8049668567..48ee74813d 100644
--- a/lzma/DOC/lzma-history.txt
+++ b/lzma/DOC/lzma-history.txt
@@ -1,6 +1,14 @@
 HISTORY of the LZMA SDK
 -----------------------
 
+19.00          2019-02-21
+-------------------------
+- Encryption strength for 7z archives was increased:
+  the size of random initialization vector was increased from 64-bit to 128-bit,
+  and the pseudo-random number generator was improved.
+- The bug in 7zIn.c code was fixed.
+
+
 18.06          2018-12-30
 -------------------------
 - The speed for LZMA/LZMA2 compressing was increased by 3-10%,
diff --git a/lzma/DOC/lzma-sdk.txt b/lzma/DOC/lzma-sdk.txt
index 1679cb0d84..b0e14a2e29 100644
--- a/lzma/DOC/lzma-sdk.txt
+++ b/lzma/DOC/lzma-sdk.txt
@@ -1,4 +1,4 @@
-LZMA SDK 18.06
+LZMA SDK 19.00
 --------------
 
 LZMA SDK provides the documentation, samples, header files,