diff --git a/library/md5.c b/library/md5.c
index 7a449b2..298f1fa 100644
--- a/library/md5.c
+++ b/library/md5.c
@@ -41,18 +41,18 @@
 /*
  * 32-bit integer manipulation macros (little endian)
  */
-#ifndef GET_ULONG_LE
-#define GET_ULONG_LE(n,b,i)                             \
+#ifndef GET_UINT32_LE
+#define GET_UINT32_LE(n,b,i)                            \
 {                                                       \
-    (n) = ( (unsigned long) (b)[(i)    ]       )        \
-        | ( (unsigned long) (b)[(i) + 1] <<  8 )        \
-        | ( (unsigned long) (b)[(i) + 2] << 16 )        \
-        | ( (unsigned long) (b)[(i) + 3] << 24 );       \
+    (n) = ( (uint32_t) (b)[(i)    ]       )             \
+        | ( (uint32_t) (b)[(i) + 1] <<  8 )             \
+        | ( (uint32_t) (b)[(i) + 2] << 16 )             \
+        | ( (uint32_t) (b)[(i) + 3] << 24 );            \
 }
 #endif
 
-#ifndef PUT_ULONG_LE
-#define PUT_ULONG_LE(n,b,i)                             \
+#ifndef PUT_UINT32_LE
+#define PUT_UINT32_LE(n,b,i)                            \
 {                                                       \
     (b)[(i)    ] = (unsigned char) ( (n)       );       \
     (b)[(i) + 1] = (unsigned char) ( (n) >>  8 );       \
@@ -77,24 +77,24 @@
 
 static void md5_process( md5_context *ctx, const unsigned char data[64] )
 {
-    unsigned long X[16], A, B, C, D;
+    uint32_t X[16], A, B, C, D;
 
-    GET_ULONG_LE( X[ 0], data,  0 );
-    GET_ULONG_LE( X[ 1], data,  4 );
-    GET_ULONG_LE( X[ 2], data,  8 );
-    GET_ULONG_LE( X[ 3], data, 12 );
-    GET_ULONG_LE( X[ 4], data, 16 );
-    GET_ULONG_LE( X[ 5], data, 20 );
-    GET_ULONG_LE( X[ 6], data, 24 );
-    GET_ULONG_LE( X[ 7], data, 28 );
-    GET_ULONG_LE( X[ 8], data, 32 );
-    GET_ULONG_LE( X[ 9], data, 36 );
-    GET_ULONG_LE( X[10], data, 40 );
-    GET_ULONG_LE( X[11], data, 44 );
-    GET_ULONG_LE( X[12], data, 48 );
-    GET_ULONG_LE( X[13], data, 52 );
-    GET_ULONG_LE( X[14], data, 56 );
-    GET_ULONG_LE( X[15], data, 60 );
+    GET_UINT32_LE( X[ 0], data,  0 );
+    GET_UINT32_LE( X[ 1], data,  4 );
+    GET_UINT32_LE( X[ 2], data,  8 );
+    GET_UINT32_LE( X[ 3], data, 12 );
+    GET_UINT32_LE( X[ 4], data, 16 );
+    GET_UINT32_LE( X[ 5], data, 20 );
+    GET_UINT32_LE( X[ 6], data, 24 );
+    GET_UINT32_LE( X[ 7], data, 28 );
+    GET_UINT32_LE( X[ 8], data, 32 );
+    GET_UINT32_LE( X[ 9], data, 36 );
+    GET_UINT32_LE( X[10], data, 40 );
+    GET_UINT32_LE( X[11], data, 44 );
+    GET_UINT32_LE( X[12], data, 48 );
+    GET_UINT32_LE( X[13], data, 52 );
+    GET_UINT32_LE( X[14], data, 56 );
+    GET_UINT32_LE( X[15], data, 60 );
 
 #define S(x,n) ((x << n) | ((x & 0xFFFFFFFF) >> (32 - n)))
 
@@ -204,7 +204,7 @@
 void md5_update( md5_context *ctx, const unsigned char *input, size_t ilen )
 {
     size_t fill;
-    unsigned long left;
+    uint32_t left;
 
     if( ilen <= 0 )
         return;
@@ -212,10 +212,10 @@
     left = ctx->total[0] & 0x3F;
     fill = 64 - left;
 
-    ctx->total[0] += (unsigned long) ilen;
+    ctx->total[0] += (uint32_t) ilen;
     ctx->total[0] &= 0xFFFFFFFF;
 
-    if( ctx->total[0] < (unsigned long) ilen )
+    if( ctx->total[0] < (uint32_t) ilen )
         ctx->total[1]++;
 
     if( left && ilen >= fill )
@@ -255,16 +255,16 @@
  */
 void md5_finish( md5_context *ctx, unsigned char output[16] )
 {
-    unsigned long last, padn;
-    unsigned long high, low;
+    uint32_t last, padn;
+    uint32_t high, low;
     unsigned char msglen[8];
 
     high = ( ctx->total[0] >> 29 )
          | ( ctx->total[1] <<  3 );
     low  = ( ctx->total[0] <<  3 );
 
-    PUT_ULONG_LE( low,  msglen, 0 );
-    PUT_ULONG_LE( high, msglen, 4 );
+    PUT_UINT32_LE( low,  msglen, 0 );
+    PUT_UINT32_LE( high, msglen, 4 );
 
     last = ctx->total[0] & 0x3F;
     padn = ( last < 56 ) ? ( 56 - last ) : ( 120 - last );
@@ -272,10 +272,10 @@
     md5_update( ctx, (unsigned char *) md5_padding, padn );
     md5_update( ctx, msglen, 8 );
 
-    PUT_ULONG_LE( ctx->state[0], output,  0 );
-    PUT_ULONG_LE( ctx->state[1], output,  4 );
-    PUT_ULONG_LE( ctx->state[2], output,  8 );
-    PUT_ULONG_LE( ctx->state[3], output, 12 );
+    PUT_UINT32_LE( ctx->state[0], output,  0 );
+    PUT_UINT32_LE( ctx->state[1], output,  4 );
+    PUT_UINT32_LE( ctx->state[2], output,  8 );
+    PUT_UINT32_LE( ctx->state[3], output, 12 );
 }
 
 /*