diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index be35586..3b4300a 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -23,9 +23,12 @@ jobs:
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v4
+      - name: Install poetry
+        run: pipx install poetry
       - uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.python-version }}
+          cache: 'poetry'
       - name: Install project
         run: make install
       - name: Run linter
@@ -41,9 +44,12 @@ jobs:
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v4
+      - name: Install poetry
+        run: pipx install poetry
       - uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.python-version }}
+          cache: 'poetry'
       - name: Install project
         run: make install
       - name: Run tests
diff --git a/Makefile b/Makefile
index 9f3e2cf..943f354 100644
--- a/Makefile
+++ b/Makefile
@@ -20,7 +20,7 @@ show:             ## Show the current environment.
 
 .PHONY: install
 install:          ## Install the project in dev mode.
-	@if [ "$(USING_POETRY)" ]; then poetry install && exit; fi
+	@if [ "$(USING_POETRY)" ]; then poetry install --with dev && exit; fi
 	@echo "Don't forget to run 'make virtualenv' if you got errors."
 	$(ENV_PREFIX)pip install -e .[dev]