diff --git a/AUTHORS b/AUTHORS
index 55cda8990..58f002dfe 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -25,3 +25,4 @@ Moritz E. Beber <morbeb@biosustain.dtu.dk>
 Alan Hu <alanlh2@illinois.edu>
 Richard Otis <richard.otis@outlook.com>
 Erik Jansson Agnvall <erikjansson90@gmail.com>
+Simon Stelter <stelter@uni-bremen.de>
diff --git a/setup.py b/setup.py
index ea8f72fb6..6348ebb24 100644
--- a/setup.py
+++ b/setup.py
@@ -223,7 +223,7 @@ def finalize_options(self):
 '''
 
 setup(name="symengine",
-      version="0.5.0",
+      version="0.5.1",
       description="Python library providing wrappers to SymEngine",
       setup_requires=['cython>=0.19.1'],
       long_description=long_description,
@@ -231,6 +231,8 @@ def finalize_options(self):
       author_email="symengine@googlegroups.com",
       license="MIT",
       url="https://github.com/symengine/symengine.py",
+      python_requires='>=2.7,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,<4',
+      zip_safe=False,
       cmdclass = cmdclass,
       classifiers=[
         'License :: OSI Approved :: MIT License',
@@ -243,5 +245,6 @@ def finalize_options(self):
         'Programming Language :: Python :: 3.5',
         'Programming Language :: Python :: 3.6',
         'Programming Language :: Python :: 3.7',
+        'Programming Language :: Python :: 3.8',
         ]
       )
diff --git a/symengine/__init__.py b/symengine/__init__.py
index f73196906..7ead57c54 100644
--- a/symengine/__init__.py
+++ b/symengine/__init__.py
@@ -34,7 +34,7 @@ def lambdify(args, exprs, **kwargs):
         return Lambdify(args, *exprs, **kwargs)
 
 
-__version__ = "0.4.0"
+__version__ = "0.5.1"
 
 
 def test():