Python DjangoアプリをHerokuへデプロイできません

前提・実現したいこと

はじめまして。
Djangoのチュートリアルに従ってアプリをHerokuへデプロイしようとしたのですが、
躓いてしまったので質問させて頂きます。

操作環境はmacOS Sierra 10.12.4です

requirements.txtは以下の通りです。

dj-database-url==0.4.2
dj-static==0.0.6
Django==1.11
django-toolbelt==0.0.1
gunicorn==19.7.1
psycopg2==2.7.4
pytz==2018.3
static3==0.7.0
whitenoise==3.3.1

またruntime.txtは
python-3.6.1
としております。（現在は3.6.4）

Procfileは
web: gunicorn mysite.wsgi
としております。

発生している問題・エラーメッセージ

$ git push heroku master
Counting objects: 20, done.
Delta compression using up to 4 threads.
Compressing objects: 100% (17/17), done.
Writing objects: 100% (20/20), 4.49 KiB | 0 bytes/s, done.
Total 20 (delta 0), reused 0 (delta 0)
remote: Compressing source files... done.
remote: Building source:
remote:
remote: -----> Python app detected
remote: ! The latest version of Python 3 is python-3.6.4 (you are using python-3.5.2, which is unsupported).
remote: ! We recommend upgrading by specifying the latest version (python-3.6.4).
remote: Learn More: https://devcenter.heroku.com/articles/python-runtimes
remote: -----> Installing python-3.5.2
remote: -----> Installing pip
remote: -----> Installing requirements with pip
remote: Collecting dj-database-url==0.4.2 (from -r /tmp/build_f00c4f6111265672b69a2abbe2dde18d/requirements.txt (line 1))
remote: Downloading dj_database_url-0.4.2-py2.py3-none-any.whl
remote: Collecting Django==1.11 (from -r /tmp/build_f00c4f6111265672b69a2abbe2dde18d/requirements.txt (line 2))
remote: Downloading Django-1.11-py2.py3-none-any.whl (6.9MB)
remote: Collecting gunicorn==19.7.1 (from -r /tmp/build_f00c4f6111265672b69a2abbe2dde18d/requirements.txt (line 3))
remote: Downloading gunicorn-19.7.1-py2.py3-none-any.whl (111kB)
remote: Collecting pytz==2018.3 (from -r /tmp/build_f00c4f6111265672b69a2abbe2dde18d/requirements.txt (line 4))
remote: Downloading pytz-2018.3-py2.py3-none-any.whl (509kB)
remote: Collecting whitenoise==3.3.1 (from -r /tmp/build_f00c4f6111265672b69a2abbe2dde18d/requirements.txt (line 5))
remote: Downloading whitenoise-3.3.1-py2.py3-none-any.whl
remote: Collecting psycopg2==2.5.4 (from -r /tmp/build_f00c4f6111265672b69a2abbe2dde18d/requirements.txt (line 6))
remote: Downloading psycopg2-2.5.4.tar.gz (682kB)
remote: Complete output from command python setup.py egg_info:
remote: running egg_info
remote: creating pip-egg-info/psycopg2.egg-info
remote: writing top-level names to pip-egg-info/psycopg2.egg-info/top_level.txt
remote: writing dependency_links to pip-egg-info/psycopg2.egg-info/dependency_links.txt
remote: writing pip-egg-info/psycopg2.egg-info/PKG-INFO
remote: writing manifest file 'pip-egg-info/psycopg2.egg-info/SOURCES.txt'
remote: Error: could not determine PostgreSQL version from '10.1'
remote:
remote: ----------------------------------------
remote: Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-build-dy0b92ka/psycopg2/
remote: ! Push rejected, failed to compile Python app.
remote:
remote: ! Push failed
remote: Verifying deploy...
remote:
remote: ! Push rejected to jonasan-djangoblog.
remote:
To https://git.heroku.com/jonasan-djangoblog.git
! [remote rejected] master -> master (pre-receive hook declined)
error: failed to push some refs to 'https://git.heroku.com/jonasan-djangoblog.git'