diff --git a/CHANGELOG.md b/CHANGELOG.md
index 863ff32..6f4efdc 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,12 @@
 
 This project uses Semantic Versioning
 
+## 1.2.0
+
++ Accepted C+gmp implementation of MiMC from @cartr
++ Added is_fast in mimcvdf to tell which implementation is being used
+
+
 ## 1.1.0
 
 Added support for decimal output
diff --git a/README.md b/README.md
index 4b068c4..0ac2ae1 100644
--- a/README.md
+++ b/README.md
@@ -24,6 +24,8 @@ vdf_verify(same_bytes_data, vdf_create_result, rounds)
 
 ```
 
+For high speed, you need GMP installed. Otherwise, the module will fall back to a Python implementation that is significantly slower.
+
 
 ## Security
 
diff --git a/mimcvdf/__init__.py b/mimcvdf/__init__.py
index ce2dff6..6598f0b 100644
--- a/mimcvdf/__init__.py
+++ b/mimcvdf/__init__.py
@@ -5,7 +5,7 @@ import time
 from statistics import mean
 from math import ceil
 
-from .mimc import forward_mimc, reverse_mimc
+from .mimc import forward_mimc, reverse_mimc, is_fast
 """
 Kevin Froman 2020
 
diff --git a/mimcvdf/mimc/native.c b/mimcvdf/mimc/native.c
index dc6441c..76db663 100644
--- a/mimcvdf/mimc/native.c
+++ b/mimcvdf/mimc/native.c
@@ -5,6 +5,7 @@
 #include <gmp.h>
 
 /*
+C Version by github.com/cartr
 This module adapted from https://github.com/OlegJakushkin/deepblockchains/blob/master/vdf/mimc/python/mimc.py by Sourabh Niyogi https://github.com/sourabhniyogi
 
 This program is free software: you can redistribute it and/or modify
@@ -43,7 +44,7 @@ mimc_init_constants()
 
     // Set LITTLE_FERMAT_EXPT to hex((MODULUS * 2 - 1) // 3)
     mpz_init(LITTLE_FERMAT_EXPT);
-    mpz_set_str(LITTLE_FERMAT_EXPT, 
+    mpz_set_str(LITTLE_FERMAT_EXPT,
                 "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
                 "aaaaaaaaaaaaaaaaaaaaa9c0aaaaaaab",
                 16);
diff --git a/setup.py b/setup.py
index dbe9fab..962ae31 100644
--- a/setup.py
+++ b/setup.py
@@ -1,11 +1,11 @@
 from setuptools import setup, find_packages, Extension
 
 setup(name='mimcvdf',
-      version='1.1.0',
+      version='1.2.0',
       description='Generic high level VDF using MiMC',
       author='Kevin Froman',
       author_email='beardog@mailbox.org',
-      url='https://www.chaoswebs.net/',
+      url='https://github.com/beardog108/mimcvdf/',
       packages=find_packages(exclude=['contrib', 'docs', 'tests']),
       install_requires=[],
       ext_package="mimcvdf",