diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index fc51a9f82..9de760ed2 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -55,7 +55,7 @@ jobs:
         shell: bash
       - name: Install coveralls
         run: |
-          poetry install "coveralls<2"
+          poetry add "coveralls<2"
         shell: bash
       - name: Coveralls
         env:
diff --git a/requirements.txt b/requirements.txt
deleted file mode 100644
index 04112359f..000000000
--- a/requirements.txt
+++ /dev/null
@@ -1,92 +0,0 @@
---index-url https://pypi.python.org/simple/
-
-ipython
-sphinx
-sphinx-autobuild
-sphinxcontrib-plantuml
-recommonmark
-sphinx-rtd-theme
-pytest-bdd<4.0.0
-pytest-cov
-pytest-mock
-pytest-subtests
-pytest-twisted
-coverage
-pytest-runner
-pytest
-jinja2
-mock
--e .
-enum34==1.1.10
-funcsigs==1.0.2
-future==0.18.2
-futures==3.3.0
-glob2==0.7
-greenlet==0.4.16
-hyperlink==17.1.1
-idna==2.10
-imagesize==1.2.0
-importlib-metadata==1.7.0
-incremental==17.5.0
-ipaddress==1.0.23
-ipdb==0.10.2
-ipython==4.2.0
-ipython-genutils==0.2.0
-Jinja2==2.11.2
-livereload==2.6.3
-Mako==1.1.3
-MarkupSafe==1.1.1
-mock==3.0.5
-more-itertools==5.0.0
-nltk==3.4.5
-packaging==20.4
-parse==1.18.0
-parse-type==0.5.2
-pathlib2==2.3.5
-pathtools==0.1.2
-pexpect==4.8.0
-pickleshare==0.7.5
-pluggy==0.13.1
-port-for==0.3.1
-ptyprocess==0.6.0
-py==1.9.0
-pyasn1==0.4.8
-pyasn1-modules==0.2.8
-pycparser==2.20
-Pygments==2.5.2
-PyHamcrest==1.10.1
-pyparsing==2.4.7
-pytest==4.6.11
-pytest-bdd==3.2.1
-pytest-cov==2.10.1
-pytest-mock==2.0.0
-pytest-runner==5.2
-pytest-twisted==1.13.2
-pytz==2020.1
-PyXB==1.2.6
-PyYAML==5.3.1
-recommonmark==0.6.0
-requests==2.24.0
-scandir==1.10.0
-service-identity==18.1.0
-simplegeneric==0.8.1
-singledispatch==3.4.0.3
-six==1.15.0
-snowballstemmer==2.0.0
-sortedcontainers==2.2.2
-Sphinx==1.8.5
-sphinx-autobuild==0.7.1
-sphinx-rtd-theme==0.5.0
-sphinxcontrib-plantuml==0.18.1
-sphinxcontrib-websupport==1.1.2
-tornado==5.1.1
-total-ordering==0.1.0
-traitlets==4.3.3
-Twisted==20.3.0
-txaio==18.8.1
-typing==3.7.4.3
-urllib3==1.25.10
-watchdog==0.10.3
-wcwidth==0.2.5
-zipp==1.2.0
-zope.interface==5.1.0