diff --git a/IFUnicodeURL/IDNSDK/nameprep.c b/IFUnicodeURL/IDNSDK/nameprep.c
index 95e2fc9..b69834e 100644
--- a/IFUnicodeURL/IDNSDK/nameprep.c
+++ b/IFUnicodeURL/IDNSDK/nameprep.c
@@ -73,9 +73,9 @@ static const int SCount = 11172;  /* LCount * NCount */
 static void insert( DWORD * target, size_t * length, size_t offset, DWORD ch ) 
 {
   int i;
-  if (offset < 0 || offset > *length) {return;}
+  if (offset > *length) {return;}
 
-  for (i=(*length); i>offset; i--) {target[i] = target[i-1];}
+  for (i=(int)(*length); i>offset; i--) {target[i] = target[i-1];}
 
   target[offset] = ch;
 
@@ -160,11 +160,11 @@ static int composeHangul( DWORD dwLastCh, DWORD ch, DWORD * pdwOut )
 
   /* 1. check to see if two current characters are L and V */
 
-  LIndex = dwLastCh - LBase;
+  LIndex = (int)(dwLastCh - LBase);
 
   if ( 0 <= LIndex && LIndex < LCount ) 
   {
-    int VIndex = ch - VBase;
+    int VIndex = (int)(ch - VBase);
     if ( 0 <= VIndex && VIndex < VCount ) 
     {
 
@@ -177,11 +177,11 @@ static int composeHangul( DWORD dwLastCh, DWORD ch, DWORD * pdwOut )
 
   /* 2. check to see if two current characters are LV and T */
 
-  SIndex = dwLastCh - SBase;
+  SIndex = (int)(dwLastCh - SBase);
 
   if ( 0 <= SIndex && SIndex < SCount && (SIndex % TCount) == 0 ) 
   {
-    int TIndex = ch - TBase;
+    int TIndex = (int)(ch - TBase);
     if (0 <= TIndex && TIndex <= TCount) 
     {
 
@@ -212,7 +212,7 @@ static int composeHangul( DWORD dwLastCh, DWORD ch, DWORD * pdwOut )
 
 static int decomposeHangul( DWORD ch, DWORD * pdwOut ) 
 {
-  int SIndex = ch - SBase;
+  int SIndex = (int)(ch - SBase);
   int L;
   int V;
   int T;
@@ -345,7 +345,7 @@ static int doKCDecompose( const DWORD * input, int input_size,
     {
       ch = buf[j];
 
-      cClass = lookup_canonical(ch);
+      cClass = (int)lookup_canonical(ch);
 
       cursor = output_offset;
 
@@ -353,7 +353,7 @@ static int doKCDecompose( const DWORD * input, int input_size,
       {
         for (; cursor > 0; --cursor) 
         {
-          nCanonicalItem = lookup_canonical(output[cursor-1]);
+          nCanonicalItem = (int)lookup_canonical(output[cursor-1]);
           if (nCanonicalItem <= cClass) {break;}
         }
       }
@@ -363,7 +363,7 @@ static int doKCDecompose( const DWORD * input, int input_size,
   
   if (output_offset > *output_size) {return XCODE_NAMEPREP_BUFFER_OVERFLOW_ERROR;}
   
-  *output_size = output_offset;
+  *output_size = (int)output_offset;
   
   return XCODE_SUCCESS; 
 }
@@ -392,7 +392,7 @@ static int doKCCompose( DWORD * output, int * output_size )
 
   startCh = output[0];
 
-  lastClass = lookup_canonical(startCh);
+  lastClass = (int)lookup_canonical(startCh);
 
   if ( lastClass != 0 ) 
   {
@@ -408,7 +408,7 @@ static int doKCCompose( DWORD * output, int * output_size )
 
     DWORD ch = output[decompPos];
 
-    chClass = lookup_canonical(ch);
+    chClass = (int)lookup_canonical(ch);
 
     nComposeResult = composeHangul( startCh, ch, &nComposeItem );
 
@@ -426,7 +426,7 @@ static int doKCCompose( DWORD * output, int * output_size )
       composite = 0xffff; /* 65535 */
     } else 
     {
-      composite = nComposeItem;
+      composite = (int)nComposeItem;
     }
 
     if (composite != 0xffff && (lastClass < chClass || lastClass == 0)) 
diff --git a/IFUnicodeURL/IDNSDK/puny.c b/IFUnicodeURL/IDNSDK/puny.c
index 57035d6..3414aaa 100644
--- a/IFUnicodeURL/IDNSDK/puny.c
+++ b/IFUnicodeURL/IDNSDK/puny.c
@@ -187,7 +187,7 @@ int punycode_encode( unsigned int input_length,
     ++delta, ++n;
   }
 
-  *output_length = out;
+  *output_length = (int)out;
   return XCODE_SUCCESS;
 }
 
@@ -270,7 +270,7 @@ int punycode_decode( unsigned int input_length,
     output[i++] = n;
   }
 
-  *output_length = out;
+  *output_length = (int)out;
   return XCODE_SUCCESS;
 }
 
diff --git a/IFUnicodeURL/IDNSDK/toxxx.c b/IFUnicodeURL/IDNSDK/toxxx.c
index 6fbb48f..406815e 100644
--- a/IFUnicodeURL/IDNSDK/toxxx.c
+++ b/IFUnicodeURL/IDNSDK/toxxx.c
@@ -189,7 +189,7 @@ int Xcode_ToASCII( const UTF16CHAR *  puzInputString,
   en = 0;
   for ( i = 0; i < iOutputSize; i++ ) 
   {
-    if ( *(dwzOutputString+i) < 0 || *(dwzOutputString+i) > 0x7F ) 
+    if ( *(dwzOutputString+i) > 0x7F ) 
     {
       int res;
       /* 5. Verify that the sequence does NOT begin with the ACE prefix. */
diff --git a/IFUnicodeURL/IDNSDK/util.c b/IFUnicodeURL/IDNSDK/util.c
index af2fd69..addce46 100644
--- a/IFUnicodeURL/IDNSDK/util.c
+++ b/IFUnicodeURL/IDNSDK/util.c
@@ -61,7 +61,7 @@ absence of 0..2C, 2E..2F, 3A..40, 5B..60, and 7B..7F.
 
 int is_ldh_character32(const DWORD c)
 {
-	if ( ( c >= 0x0000 && c <= 0x002C ) ||
+	if ( c <= 0x002C ||
 		( c == 0x002E || c == 0x002F ) ||
 		( c >= 0x003A && c <= 0x0040 ) ||
 		( c >= 0x005B && c <= 0x0060 ) ||
@@ -479,7 +479,7 @@ UCHAR8 * pszResult, int * piResultLength )
 
 	if (high) {return XCODE_UTIL_LONELY_HIGH_SURROGATE;}
 
-	*piResultLength = output_offset;
+	*piResultLength = (int)output_offset;
 
 	return XCODE_SUCCESS;
 }
@@ -604,7 +604,7 @@ int *             piResultLength )
 		return XCODE_UTIL_INVALID_8BIT_INPUT;
 	}
 
-	*piResultLength = output_offset;
+	*piResultLength = (int)output_offset;
 
 	return XCODE_SUCCESS;
 }
diff --git a/IFUnicodeURL/NSURL+IFUnicodeURL.m b/IFUnicodeURL/NSURL+IFUnicodeURL.m
index a0dab3a..517d9af 100644
--- a/IFUnicodeURL/NSURL+IFUnicodeURL.m
+++ b/IFUnicodeURL/NSURL+IFUnicodeURL.m
@@ -43,7 +43,7 @@ - (NSArray *)IFUnicodeURL_splitBeforeCharactersInSet:(NSCharacterSet *)chars
 static NSString *ConvertUnicodeDomainString(NSString *hostname, BOOL toAscii)
 {
 	const UTF16CHAR *inputString = (const UTF16CHAR *)[hostname cStringUsingEncoding:NSUTF16StringEncoding];
-	int inputLength = [hostname lengthOfBytesUsingEncoding:NSUTF16StringEncoding] / sizeof(UTF16CHAR);
+	int inputLength = (int)([hostname lengthOfBytesUsingEncoding:NSUTF16StringEncoding] / sizeof(UTF16CHAR));
 	
 	if (toAscii) {
 		int outputLength = MAX_DOMAIN_SIZE_8;