diff --git a/Source/3rd Party/zlib/contrib/minizip/crypt.h b/Source/3rd Party/zlib/contrib/minizip/crypt.h
index 9a1d5b69a..02db6531a 100644
--- a/Source/3rd Party/zlib/contrib/minizip/crypt.h	
+++ b/Source/3rd Party/zlib/contrib/minizip/crypt.h	
@@ -32,14 +32,14 @@
 /***********************************************************************
  * Return the next byte in the pseudo-random sequence
  */
-static int decrypt_byte(unsigned long* pkeys)
+static Byte decrypt_byte(unsigned long* pkeys)
 {
     unsigned temp;  /* POTENTIAL BUG:  temp*(temp^1) may overflow in an
                      * unpredictable manner on 16-bit systems; not a problem
                      * with any known compiler so far, though */
 
     temp = ((unsigned)(*(pkeys+2)) & 0xffff) | 2;
-    return (int)(((temp * (temp ^ 1)) >> 8) & 0xff);
+    return (Byte)(((temp * (temp ^ 1)) >> 8) & 0xFF);
 }
 
 /***********************************************************************
@@ -95,8 +95,8 @@ static int crypthead(const char* passwd,      /* password string */
                      unsigned long crcForCrypting)
 {
     int n;                       /* index in random header */
-    int t;                       /* temporary */
-    int c;                       /* random byte */
+    Byte t;                      /* temporary */
+    Byte c;                      /* random byte */
     unsigned char header[RAND_HEAD_LEN-2]; /* random header */
     static unsigned calls = 0;   /* ensure different random header each time */
 
@@ -114,17 +114,17 @@ static int crypthead(const char* passwd,      /* password string */
     init_keys(passwd, pkeys, pcrc_32_tab);
     for (n = 0; n < RAND_HEAD_LEN-2; n++)
     {
-        c = (rand() >> 7) & 0xff;
-        header[n] = (unsigned char)zencode(pkeys, pcrc_32_tab, c, t);
+        c = (Byte)((rand() >> 7) & 0xFF);
+        header[n] = zencode(pkeys, pcrc_32_tab, c, t);
     }
     /* Encrypt random header (last two bytes is high word of crc) */
     init_keys(passwd, pkeys, pcrc_32_tab);
     for (n = 0; n < RAND_HEAD_LEN-2; n++)
     {
-        buf[n] = (unsigned char)zencode(pkeys, pcrc_32_tab, header[n], t);
+        buf[n] = zencode(pkeys, pcrc_32_tab, header[n], t);
     }
-    buf[n++] = (unsigned char)zencode(pkeys, pcrc_32_tab, (int)(crcForCrypting >> 16) & 0xff, t);
-    buf[n++] = (unsigned char)zencode(pkeys, pcrc_32_tab, (int)(crcForCrypting >> 24) & 0xff, t);
+    buf[n++] = zencode(pkeys, pcrc_32_tab, (crcForCrypting >> 16) & 0xFF, t);
+    buf[n++] = zencode(pkeys, pcrc_32_tab, (crcForCrypting >> 24) & 0xFF, t);
     return n;
 }
 
diff --git a/Source/3rd Party/zlib/contrib/minizip/zip.c b/Source/3rd Party/zlib/contrib/minizip/zip.c
index 63ad73cae..68a4b2b48 100644
--- a/Source/3rd Party/zlib/contrib/minizip/zip.c	
+++ b/Source/3rd Party/zlib/contrib/minizip/zip.c	
@@ -1368,8 +1368,9 @@ local int zip64FlushWriteBuffer(zip64_internal* zi)
     {
 #ifndef NOCRYPT
         uInt i;
-        int t;
-        for (i=0;i<zi->ci.pos_in_buffered_data;i++)
+        Byte t;
+
+        for (i = 0; i < zi->ci.pos_in_buffered_data; i++)
             zi->ci.buffered_data[i] = zencode(zi->ci.keys, zi->ci.pcrc_32_tab, zi->ci.buffered_data[i],t);
 #endif
     }