diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 8c4fee4..a09b2be 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -35,9 +35,10 @@ jobs:
       with:
         python-version: ${{ matrix.python-version }}
 
-    - name: Prepare tests
+    - name: Install dependencies
       run: |
         pip install -U pip poetry
+        poetry env use $(which python)
         poetry install
 
     - name: E2E tests
diff --git a/pyproject.toml b/pyproject.toml
index ddc3770..65dcf95 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -15,7 +15,7 @@ include = [
 kosmorro = 'kosmorro.__main__:main'
 
 [tool.poetry.dependencies]
-python = ">=3.8,<3.12"
+python = "^3.8"
 tabulate = ">=0.8,<0.10"
 termcolor = ">=1.1,<3.0"
 kosmorrolib = "^1.0"