diff --git a/lib/hashpasswd.rb b/lib/hashpasswd.rb
index 15070af..657b310 100644
--- a/lib/hashpasswd.rb
+++ b/lib/hashpasswd.rb
@@ -27,7 +27,7 @@ def self.createhash(password, options={})
     @delimeter = options[:delimter] || ':'
     @digest = options[:digest] || 'SHA1'
 
-    salt = SecureRandom.base64(@salt_byte_size)
+    salt = OpenSSL::Random.random_bytes(@salt_byte_size)
     pbkdf2 = OpenSSL::PKCS5::pbkdf2_hmac(
       password,
       salt,