diff --git a/db-wrapper.c b/db-wrapper.c
index 3bafad3..59b5fce 100644
--- a/db-wrapper.c
+++ b/db-wrapper.c
@@ -7,7 +7,7 @@ static int l_getdb (lua_State *L) {
 //	if(db)
 //		dbclose(db);
 	//printf("OPEN: %s\n",s);
-	sqldb db = __getdb(s);
+	sqldb db = __getdb((char*)s);
 	if(db)
 		lua_pushlightuserdata(L, db);
 	else
diff --git a/json-wrapper.c b/json-wrapper.c
index 9f35ed0..d1a2d13 100644
--- a/json-wrapper.c
+++ b/json-wrapper.c
@@ -76,35 +76,36 @@ static int process_token_array(lua_State* L, jsmntok_t* t, const char* s, int ci
 	return id;
 }
 
+/*
 static void stackDump (lua_State *L) {
       int i;
       int top = lua_gettop(L);
-      for (i = 1; i <= top; i++) {  /* repeat for each level */
+      for (i = 1; i <= top; i++) {  
         int t = lua_type(L, i);
         switch (t) {
     
-          case LUA_TSTRING:  /* strings */
+          case LUA_TSTRING:  
             printf("`%s' \n", lua_tostring(L, i));
             break;
     
-          case LUA_TBOOLEAN:  /* booleans */
+          case LUA_TBOOLEAN: 
             printf(lua_toboolean(L, i) ? "true\n" : "false\n");
             break;
     
-          case LUA_TNUMBER:  /* numbers */
+          case LUA_TNUMBER:  
             printf("%g\n", lua_tonumber(L, i));
             break;
     
-          default:  /* other values */
+          default:  
             printf("%s\n", lua_typename(L, t));
             break;
     
         }
-        printf("  ");  /* put a separator */
+        printf("  ");  
       }
-      printf("\n");  /* end the listing */
+      printf("\n");  
     }
-	
+*/
 static int process_token_string(lua_State* L, jsmntok_t* t, const char* s, int cid)
 {
 	// unescape a string
@@ -118,7 +119,7 @@ static int process_token_string(lua_State* L, jsmntok_t* t, const char* s, int c
 	if (lua_pcall(L, 1, 1, 0) != 0)
 	        printf("Error running function `unescape': %s\n",lua_tostring(L, -1));
 	if(str) free(str);
-	str = luaL_checkstring(L,-1);
+	str = (char*)luaL_checkstring(L,-1);
 	lua_settop(L, -3);
 	lua_pushstring(L,str);
 	//stackDump(L);
diff --git a/lib/ulib/ulib.c b/lib/ulib/ulib.c
index 46e9775..0ff5c05 100644
--- a/lib/ulib/ulib.c
+++ b/lib/ulib/ulib.c
@@ -198,7 +198,7 @@ static int l_getuid(lua_State* L)
                LOG("malloc eror \n");
                return 1;
            }
-		if (getgrouplist(name, gid, groups, &ngroups) == -1) {
+		if (getgrouplist(name, gid, (int*)groups, &ngroups) == -1) {
 			free(groups);
 			LOG("getgrouplist() returned -1; ngroups = %d\n", ngroups);
 			return 1;
diff --git a/lib/wurl/wurl.c b/lib/wurl/wurl.c
index 728bd95..abc3a03 100644
--- a/lib/wurl/wurl.c
+++ b/lib/wurl/wurl.c
@@ -61,7 +61,7 @@ send a request
 */
 int wurl_request_socket(const char* ip, int port)
 {
-	int sockfd, bytes_read;
+	int sockfd;
 	struct sockaddr_in dest;
 	
 	// time out setting
@@ -82,7 +82,7 @@ int wurl_request_socket(const char* ip, int port)
     bzero(&dest, sizeof(dest));
     dest.sin_family = AF_INET;
     dest.sin_port = htons(port);
-    if ( inet_aton(ip, &dest.sin_addr.s_addr) == 0 )
+    if ( inet_aton(ip, &dest.sin_addr) == 0 )
     {
 		perror(ip);
 		close(sockfd);
@@ -344,14 +344,14 @@ int wurl_read_data(int sock,char** din)
 	char* tmp = NULL;
 	int CHUNK = 512;
 	char buff[MAX_BUFF];
-	char * data = (unsigned char*) malloc(CHUNK);
+	char * data = ( char*) malloc(CHUNK);
 	int cursize = CHUNK;
 	int size = wurl_read_buf(sock,buff,MAX_BUFF);
 	while(size > 0)
 	{
 		if(total_length+size > cursize)
 		{
-			tmp = (unsigned char*) realloc(data,total_length + size+ CHUNK );
+			tmp = (char*) realloc(data,total_length + size+ CHUNK );
 			
 			if(!tmp) 
 			{
@@ -380,7 +380,6 @@ int wurl_read_data(int sock,char** din)
 int wurl_request(const char* hostname, int port, wurl_header_t* header, int lazy)
 {
 	char ip[100];
-	char buff[MAX_BUFF];
 	wurl_ip_from_hostname(hostname ,ip);
 	int sock = wurl_request_socket(ip, port);
 	
@@ -400,8 +399,7 @@ int wurl_request(const char* hostname, int port, wurl_header_t* header, int lazy
 	if(lazy)
 	{
 		// read line by line, ignore content length
-		char * d;
-		header->clen = wurl_read_data(sock,&header->data);
+		header->clen = wurl_read_data(sock,(char**)&header->data);
 		return 0;
 	} 	
 	return sock;
@@ -411,7 +409,7 @@ int wurl_download(const char* hostname, int port, wurl_header_t* h, const char*
 {
 	// we will handler the data reading
 	int sock = wurl_request(hostname, port,h,0);
-	unsigned char buff[MAX_BUFF];
+	char buff[MAX_BUFF];
 	if(sock < 0) return -1;
 	
 	FILE* fp =  fopen(to,"wb");
@@ -471,7 +469,7 @@ static int l_get(lua_State *L)
 	const char* resource = luaL_checkstring(L,3);
 	
 	wurl_header_t rq;
-	rq.resource = resource;
+	rq.resource = (char*)resource;
 	rq.type = GET;
 	
 	if(wurl_request(host,port,&rq,1) == 0)
@@ -492,11 +490,11 @@ static int l_get(lua_State *L)
 		{
 			//printf("Data is binary, encode as base64 %s\n", rq.ctype);
 			char* dst = (char*) malloc(3*rq.clen/2);
-			Base64encode(dst, rq.data,rq.clen);
+			Base64encode(dst, (const char*)rq.data,rq.clen);
 			lua_pushstring(L,dst);
 			free(dst);
 		} else
-			lua_pushstring(L,rq.data);
+			lua_pushstring(L,(const char*)rq.data);
 		free(rq.data); // be careful
 		lua_settable(L,-3);
 		return 1;
@@ -515,11 +513,11 @@ static int l_post(lua_State *L)
 	const char* ctype = luaL_checkstring(L,4); // content type
 	const char* data = luaL_checkstring(L,5); // post data
 	wurl_header_t rq;
-	rq.resource = res;
+	rq.resource = (char*)res;
 	rq.type = POST;
-	rq.ctype = ctype;
+	rq.ctype = (char*)ctype;
 	rq.clen = strlen(data);
-	rq.data = data;
+	rq.data = (unsigned char*)data;
 	
 	if(wurl_request(host,port,&rq,1) == 0)
 	{
@@ -540,11 +538,11 @@ static int l_post(lua_State *L)
 		{
 			//printf("Data is binary, encode as base64 %s\n", rq.ctype);
 			char* dst = (char*) malloc(3*rq.clen/2);
-			Base64encode(dst, rq.data,rq.clen);
+			Base64encode(dst, (const char*)rq.data,rq.clen);
 			lua_pushstring(L,dst);
 			free(dst);
 		} else
-			lua_pushstring(L,rq.data);
+			lua_pushstring(L,(const char*)rq.data);
 		free(rq.data); // be careful
 		lua_settable(L,-3);
 		return 1;
@@ -564,7 +562,7 @@ static int l_download(lua_State* L)
 	const char* res = luaL_checkstring(L,3); // resource
 	const char* file = luaL_checkstring(L,4); // file 
 	wurl_header_t rq;
-	rq.resource = res;
+	rq.resource = (char*)res;
 	rq.type = GET;
 	if(wurl_download(host,port,&rq,file) == 0)
 		lua_pushboolean(L, true);
@@ -590,21 +588,21 @@ static int l_upload(lua_State* L)
 	if(sock <= 0) goto fail;
 	
 	char * names[2];
-	names[0] = name;
+	names[0] = (char*)name;
 	char* files[2];
 	//files[0] = "/Users/mrsang/tmp/Archive.zip";
-	files[0] = file;
+	files[0] = (char*)file;
 	
 	//printf("SENDIND DILE\n");
-	wurl_send_files(sock, resource,1,names,files);
+	wurl_send_files(sock, (char*)resource,1,names,files);
 	wurl_header_t header;
 	//printf("READ HEADER\n");
 	wurl_response_header(sock, &header);
 	//printf("read data\n");
-	wurl_read_data(sock,&header.data);
+	wurl_read_data(sock,(char**)&header.data);
 	if(header.ctype != NULL && header.data)
 	{
-		lua_pushstring(L,header.data);
+		lua_pushstring(L,(const char*)header.data);
 		free(header.data);
 		return 1;
 	}
diff --git a/plugin-wrapper.c b/plugin-wrapper.c
index 6b32103..4b22da5 100644
--- a/plugin-wrapper.c
+++ b/plugin-wrapper.c
@@ -49,7 +49,7 @@ static int l_jpeg (lua_State *L) {
 static int l_octstream (lua_State *L) {
 	void* client = lua_touserdata (L, 1);
 	const char* s = luaL_checkstring(L,2);
-	octstream(client,s);
+	octstream(client,(char*)s);
 	return 0;  /* number of results */
 }
 
@@ -224,7 +224,7 @@ static int l_md5(lua_State* L)
 	const char* s = luaL_checkstring(L,1);
 	int len = strlen(s);
 	char buff[256];
-	md5(s,len,buff);
+	md5((uint8_t*)s,len,buff);
 	lua_pushstring(L,buff);
 	return 1;	
 }
@@ -238,20 +238,20 @@ static int l_sha1(lua_State *L )
 }
 static int l_base64_encode(lua_State *L)
 {
-	const char* s;
+	char* s;
 	int len;
 	char* dst;
 	byte_array_t *arr = NULL;
 	if(lua_isstring(L,1))
 	{
-		s= luaL_checkstring(L,1);
+		s= (char*)luaL_checkstring(L,1);
 		len = strlen(s);
 	}
 	else
 	{
 		// this may be an bytearray
 		arr = l_check_barray(L,1);
-		s = arr->data;
+		s = (char*)arr->data;
 		len = arr->size;
 	}
 	if(len == 0)
@@ -273,7 +273,7 @@ static int l_base64_decode(lua_State *L)
 	lua_new_byte_array(L,len);
 	byte_array_t * arr = NULL;
 	arr = l_check_barray(L,2);
-	len = Base64decode(arr->data, s);
+	len = Base64decode((char*)arr->data, s);
 	arr->size = len;
 	//lua_pushstring(L,dst);
 	//free(dst);
@@ -425,7 +425,7 @@ static int l_ws_read_header(lua_State *L)
 static int l_ws_t(lua_State*L)
 {
 	void* client = lua_touserdata (L, 1);
-	char* str = luaL_checkstring(L,2);
+	char* str = (char*)luaL_checkstring(L,2);
 	ws_t(client,str);
 	return 1;
 }
@@ -443,7 +443,7 @@ static int l_status(lua_State*L)
  static int l_ws_f(lua_State*L)
  {
 	void* client = lua_touserdata (L, 1);
-	char* str = luaL_checkstring(L,2);
+	char* str = (char*)luaL_checkstring(L,2);
 	ws_f(client,str);
 	return 1;
  }
@@ -465,7 +465,7 @@ static int l_status(lua_State*L)
 
  static int l_trim(lua_State* L)
  {
-	 const char* str = strdup((char*)luaL_checkstring(L,1));
+	char* str = strdup((char*)luaL_checkstring(L,1));
 	 const char* tok = luaL_checkstring(L,2);
 	 
 	 trim(str,tok[0]);