diff --git a/requirements.txt b/requirements.txt
index 0d7581f..c02cefe 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,3 @@
-wheel==0.24.0
-timeout-decorator==0.3.3
-future==0.16.0
+wheel >= 0.24.0
+timeout-decorator >= 0.3.3
+future >= 0.16
diff --git a/setup.py b/setup.py
index b6354ee..de96aae 100644
--- a/setup.py
+++ b/setup.py
@@ -10,14 +10,14 @@
     long_description = f.read()
 
 install_reqs = [
-    'future==0.16.0',
+    'future >= 0.16.0',
 ]
 
 setup(
     name='rubik_solver',
     author='Victor Cabezas',
     author_email='wiston666@gmail.com',
-    version='0.2.0',
+    version='0.2.1',
     description='Rubik solver algorithms',
     long_description=long_description,
     url='https://github.com/Wiston999/python-rubik',