diff --git a/backend/bmp.c b/backend/bmp.c
index 03a4b9c7..240c6975 100644
--- a/backend/bmp.c
+++ b/backend/bmp.c
@@ -55,7 +55,7 @@ INTERNAL int bmp_pixel_plot(struct zint_symbol *symbol, char *pixelbuf) {
     data_offset = sizeof (bitmap_file_header_t) + sizeof (bitmap_info_header_t);
     file_size = data_offset + data_size;
 
-    bitmap_file_start = malloc(file_size);
+    bitmap_file_start = (unsigned char *) malloc(file_size);
     if (bitmap_file_start == NULL) {
         strcpy(symbol->errtxt, "602: Out of memory");
         return ZINT_ERROR_MEMORY;
diff --git a/backend/dllversion.c b/backend/dllversion.c
index d59725e1..71f5a757 100644
--- a/backend/dllversion.c
+++ b/backend/dllversion.c
@@ -20,11 +20,11 @@ HRESULT DllGetVersion (DLLVERSIONINFO2* pdvi)
 		return (E_INVALIDARG);
 
 	pdvi->info1.dwMajorVersion = 2;
-	pdvi->info1.dwMinorVersion = 2;
+	pdvi->info1.dwMinorVersion = 8;
 	pdvi->info1.dwBuildNumber = 1;
 	pdvi->info1.dwPlatformID = DLLVER_PLATFORM_WINDOWS;
 	if (sizeof(DLLVERSIONINFO2) == pdvi->info1.cbSize)
-		pdvi->ullVersion = MAKEDLLVERULL(2, 2, 1, 0);
+		pdvi->ullVersion = MAKEDLLVERULL(2, 8, 1, 0);
 
 	return S_OK;
 }
diff --git a/backend/gif.c b/backend/gif.c
index 238eb1b7..c5b19ee3 100644
--- a/backend/gif.c
+++ b/backend/gif.c
@@ -309,7 +309,7 @@ INTERNAL int gif_pixel_plot(struct zint_symbol *symbol, char *pixelbuf) {
 #ifndef _MSC_VER
     char lzwoutbuf[lzoutbufSize];
 #else
-    lzwoutbuf = _alloca(lzoutbufSize);
+    lzwoutbuf = (char *) _alloca(lzoutbufSize);
 #endif /* _MSC_VER */
 
     /* Open output file in binary mode */
diff --git a/backend/large.c b/backend/large.c
index 41c16dd4..6f7d7af5 100644
--- a/backend/large.c
+++ b/backend/large.c
@@ -280,7 +280,7 @@ INTERNAL void large_uchar_array(const large_int *t, unsigned char *uchar_array,
 #ifndef _MSC_VER
     unsigned int uint_array[size ? size : 1]; /* Avoid run-time warning if size is 0 */
 #else
-    unsigned int *uint_array = _alloca((size ? size : 1) * sizeof(unsigned int));
+    unsigned int *uint_array = (unsigned int *) _alloca((size ? size : 1) * sizeof(unsigned int));
 #endif
 
     large_uint_array(t, uint_array, size, bits);
diff --git a/backend/libzint.rc b/backend/libzint.rc
index be47aac4..ba08f73e 100644
--- a/backend/libzint.rc
+++ b/backend/libzint.rc
@@ -7,8 +7,8 @@ VS_VERSION_INFO		VERSIONINFO
 #else
 VS_VERSION_INFO		VERSIONINFO
 #endif
-  FILEVERSION		2,7,1,0
-  PRODUCTVERSION	2,7,1,0
+  FILEVERSION		2,8,1,0
+  PRODUCTVERSION	2,8,1,0
   FILEFLAGSMASK		VS_FFI_FILEFLAGSMASK
 #ifdef _DEBUG
   FILEFLAGS		VS_FF_DEBUG
@@ -25,12 +25,12 @@ BEGIN
     //language ID = U.S. English, char set = Windows, Multilingual
     BEGIN
       VALUE "FileDescription",	"libzint barcode library\0"
-      VALUE "FileVersion",	"2.7.1.0\0"
+      VALUE "FileVersion",	"2.8.1.0\0"
       VALUE "InternalName",	"zint.dll\0"
-      VALUE "LegalCopyright",	"Copyright © 2017 Robin Stuart & BogDan Vatra\0"
+      VALUE "LegalCopyright",	"Copyright © 2020 Robin Stuart & BogDan Vatra\0"
       VALUE "OriginalFilename",	"zint.dll\0"
       VALUE "ProductName",	"libzint\0"
-      VALUE "ProductVersion",	"2.7.1.0\0"
+      VALUE "ProductVersion",	"2.8.1.0\0"
       VALUE "License",  "BSD License version 3\0"
       VALUE "WWW", "http://www.sourceforge.net/projects/zint"      
     END
diff --git a/backend/qr.c b/backend/qr.c
index 9bd04bf1..40a1c324 100644
--- a/backend/qr.c
+++ b/backend/qr.c
@@ -240,7 +240,7 @@ static void qr_cur_cost(unsigned int state[], const unsigned int jisdata[], cons
 static void qr_define_mode(char mode[], const unsigned int jisdata[], const size_t length, const int gs1, const int version, const int debug) {
     unsigned int state[11] = {
         0 /*N*/, 0 /*A*/, 0 /*B*/, 0 /*K*/,
-        version, gs1,
+        (unsigned int) version, (unsigned int) gs1,
         0 /*numeric_end*/, 0 /*numeric_cost*/, 0 /*alpha_end*/, 0 /*alpha_cost*/, 0 /*alpha_pcent*/
     };