diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index e9fb8cb..c008cb8 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -22,11 +22,11 @@ lint:
   before_script:
     - ./cicd/install-project-deps.sh
   script:
-    - pipenv run python setup.py check -mrs
-    - pipenv run black --check .
-    - pipenv run flake8
-    - pipenv run mypy sublime tests/**/*.py
-    - pipenv run cicd/custom_style_check.py
+    - poetry run python setup.py check -mrs
+    - poetry run black --check .
+    - poetry run flake8
+    - poetry run mypy sublime tests/**/*.py
+    - poetry run cicd/custom_style_check.py
 
 test:
   stage: test
@@ -37,7 +37,7 @@ test:
     - Xvfb :119 -screen 0 1024x768x16 &
     - export DISPLAY=:119
   script:
-    - pipenv run ./cicd/pytest.sh
+    - poetry run ./cicd/pytest.sh
   artifacts:
     paths:
       - htmlcov
@@ -47,7 +47,7 @@ build:
   before_script:
     - ./cicd/install-project-deps.sh
   script:
-    - pipenv run python setup.py sdist
+    - poetry run python setup.py sdist
   artifacts:
     paths:
       - dist/*
@@ -115,7 +115,7 @@ publish_release:
   before_script:
     - ./cicd/install-project-deps.sh
   script:
-    - pipenv run ./cicd/publish-gitlab-release.sh
+    - poetry run ./cicd/publish-gitlab-release.sh
 
 # Scheduled Jobs
 # =============================================================================
diff --git a/cicd/install-project-deps.sh b/cicd/install-project-deps.sh
index d73f5c3..164ad21 100755
--- a/cicd/install-project-deps.sh
+++ b/cicd/install-project-deps.sh
@@ -3,5 +3,9 @@ export PYENV_ROOT="${HOME}/.pyenv"
 export PATH="${PYENV_ROOT}/bin:$PATH"
 eval "$(pyenv init -)"
 
-export PIPENV_VENV_IN_PROJECT=1
-pipenv install --dev
+pip3 install poetry
+
+mkdir -p ~/.config/pypoetry/
+echo "[virtualenvs]" > ~/.config/pypoetry/config.toml
+echo "in-project = true" >> ~/.config/pypoetry/config.toml
+poetry install --dev
diff --git a/cicd/pages-build.sh b/cicd/pages-build.sh
index 8c9b00b..a063b88 100755
--- a/cicd/pages-build.sh
+++ b/cicd/pages-build.sh
@@ -3,7 +3,7 @@
 set -xe
 
 pushd docs
-pipenv run make html
+poetry run make html
 popd
 
 mv docs/_build/html public
diff --git a/cicd/python-build/Dockerfile b/cicd/python-build/Dockerfile
index 875517f..71fbe83 100644
--- a/cicd/python-build/Dockerfile
+++ b/cicd/python-build/Dockerfile
@@ -40,7 +40,7 @@ RUN apt update && \
 RUN cd /usr/local/src && \
     curl -L https://github.com/pyenv/pyenv-installer/raw/master/bin/pyenv-installer | bash
 
-RUN pip3 install pipenv
+RUN pip3 install poetry
 
 # Install the correct Python version with pyenv
 COPY install-python.sh /tmp/install-python.sh