diff --git a/vipre-manager.h b/vipre-manager.h
index f8969a7..6518492 100644
--- a/vipre-manager.h
+++ b/vipre-manager.h
@@ -57,28 +57,28 @@ void _file_read_error(void) {
     puts("\033[1mvipre-cryptor: \033[91mFile read error!\033[0m");
 }
 
-#define DATA_RAND_MAX (ULONG_MAX / 2)
+#define DATA_RAND_MAX (ULLONG_MAX / 2)
 
-static unsigned long int next = 1;
+static unsigned long long int next = 1;
 
 int _str_rand(void)
 {
   next = next * 1103515245 + 12345;
-  return (unsigned long)(next/65536) % (DATA_RAND_MAX + 1);
+  return (unsigned long long)(next/65536) % (DATA_RAND_MAX + 1);
 }
 
-void _str_srand(unsigned long seed)
+void _str_srand(unsigned long long seed)
 {
   next = seed;
 }
 
-unsigned long __generate_hash(char* str) {
+unsigned long long __generate_hash(char* str) {
     size_t pos = 0;
-    unsigned long ret = 0;
+    unsigned long long ret = 0;
     size_t max = strlen(str);
     while (pos < max) {
         ret += (unsigned char)str[pos];
-        if (ret > (unsigned long)ULONG_MAX - 10) ret = 32;
+        if (ret > (unsigned long long)ULLONG_MAX - 10) ret = 32;
         pos ++;
     }
     if (ret == 0) ret ++;