diff --git a/.github/workflows/check-python-task.yml b/.github/workflows/check-python-task.yml
index 8eaaaef..27e7ed2 100644
--- a/.github/workflows/check-python-task.yml
+++ b/.github/workflows/check-python-task.yml
@@ -11,7 +11,6 @@ on:
       - "**/poetry.lock"
       - "**/pyproject.toml"
       - "**/setup.cfg"
-      - ".python-version"
       - "Taskfile.ya?ml"
       - "**/tox.ini"
       - "**.py"
@@ -22,7 +21,6 @@ on:
       - "**/poetry.lock"
       - "**/pyproject.toml"
       - "**/setup.cfg"
-      - ".python-version"
       - "Taskfile.ya?ml"
       - "**/tox.ini"
       - "**.py"
@@ -71,7 +69,7 @@ jobs:
       - name: Install Python
         uses: actions/setup-python@v5
         with:
-          python-version-file: .python-version
+          python-version-file: pyproject.toml
 
       - name: Install Poetry
         run: |
@@ -105,7 +103,7 @@ jobs:
       - name: Install Python
         uses: actions/setup-python@v5
         with:
-          python-version-file: .python-version
+          python-version-file: pyproject.toml
 
       - name: Install Poetry
         run: |
diff --git a/.github/workflows/check-yaml-task.yml b/.github/workflows/check-yaml-task.yml
index 6cad341..7c7ecd1 100644
--- a/.github/workflows/check-yaml-task.yml
+++ b/.github/workflows/check-yaml-task.yml
@@ -6,7 +6,6 @@ on:
   create:
   push:
     paths:
-      - ".python-version"
       - ".yamllint*"
       - "poetry.lock"
       - "pyproject.toml"
@@ -23,7 +22,6 @@ on:
       - "**.syntax"
   pull_request:
     paths:
-      - ".python-version"
       - ".yamllint*"
       - "poetry.lock"
       - "pyproject.toml"
@@ -99,7 +97,7 @@ jobs:
       - name: Install Python
         uses: actions/setup-python@v5
         with:
-          python-version-file: .python-version
+          python-version-file: pyproject.toml
 
       - name: Install Poetry
         run: |
diff --git a/.github/workflows/spell-check-task.yml b/.github/workflows/spell-check-task.yml
index 09c0c60..e5c24ce 100644
--- a/.github/workflows/spell-check-task.yml
+++ b/.github/workflows/spell-check-task.yml
@@ -51,7 +51,7 @@ jobs:
       - name: Install Python
         uses: actions/setup-python@v5
         with:
-          python-version-file: .python-version
+          python-version-file: pyproject.toml
 
       - name: Install Poetry
         run: |
diff --git a/.github/workflows/test-integration.yml b/.github/workflows/test-integration.yml
index 897ff41..4ba6d93 100644
--- a/.github/workflows/test-integration.yml
+++ b/.github/workflows/test-integration.yml
@@ -7,7 +7,6 @@ on:
     paths:
       - ".github/workflows/test-integration.yml"
       - ".github/workflows/testdata/**"
-      - ".python-version"
       - "poetry.lock"
       - "pyproject.toml"
       - "action.yml"
@@ -17,7 +16,6 @@ on:
     paths:
       - ".github/workflows/test-integration.yml"
       - ".github/workflows/testdata/**"
-      - ".python-version"
       - "poetry.lock"
       - "pyproject.toml"
       - "action.yml"
diff --git a/.github/workflows/test-python-poetry-task.yml b/.github/workflows/test-python-poetry-task.yml
index 754a081..028e495 100644
--- a/.github/workflows/test-python-poetry-task.yml
+++ b/.github/workflows/test-python-poetry-task.yml
@@ -11,7 +11,6 @@ on:
       - "dev/.?codecov.ya?ml"
       - ".?codecov.ya?ml"
       - "Taskfile.ya?ml"
-      - ".python-version"
       - "poetry.lock"
       - "pyproject.toml"
       - "compilesketches/tests/**"
@@ -24,7 +23,6 @@ on:
       - "dev/.?codecov.ya?ml"
       - ".?codecov.ya?ml"
       - "Taskfile.ya?ml"
-      - ".python-version"
       - "poetry.lock"
       - "pyproject.toml"
       - "compilesketches/tests/**"
@@ -75,7 +73,7 @@ jobs:
       - name: Install Python
         uses: actions/setup-python@v5
         with:
-          python-version-file: .python-version
+          python-version-file: pyproject.toml
 
       - name: Install Poetry
         run: |
diff --git a/.python-version b/.python-version
deleted file mode 100644
index 1e33456..0000000
--- a/.python-version
+++ /dev/null
@@ -1 +0,0 @@
-3.11.2
diff --git a/action.yml b/action.yml
index 9e75969..26fba2e 100644
--- a/action.yml
+++ b/action.yml
@@ -76,7 +76,7 @@ runs:
     - name: Install Python
       uses: actions/setup-python@v5
       with:
-        python-version-file: ${{ github.action_path }}/.python-version
+        python-version-file: ${{ github.action_path }}/pyproject.toml
 
     - name: Action setup
       shell: bash