diff --git a/.github/dependabot.yml b/.github/dependabot.yml
new file mode 100644
index 0000000..8d20e2e
--- /dev/null
+++ b/.github/dependabot.yml
@@ -0,0 +1,6 @@
+version: 2
+updates:
+  - package-ecosystem: pip
+    directory: /
+    schedule:
+      interval: daily
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 009e521..964f654 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -24,7 +24,8 @@ jobs:
 
       - name: 📦 Install lint tools
         run: |
-          pip install ruff
+          python -m pip install --upgrade pip
+          pip install --group lint
           sudo apt-get update && sudo apt-get install -y shellcheck
           npm install -g markdownlint-cli2
 
diff --git a/.github/workflows/update.yml b/.github/workflows/update.yml
index 44cf284..2c4a526 100644
--- a/.github/workflows/update.yml
+++ b/.github/workflows/update.yml
@@ -29,7 +29,8 @@ jobs:
 
       - name: 📦 Install lint tools
         run: |
-          pip install ruff
+          python -m pip install --upgrade pip
+          pip install --group lint
           sudo apt-get update && sudo apt-get install -y shellcheck
           npm install -g markdownlint-cli2
 
diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..d87d29a
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,5 @@
+[dependency-groups]
+lint = ["ruff==0.17.3"]
+
+[tool.ruff]
+target-version = "py312"
diff --git a/skills/democracy/scripts/council.py b/skills/democracy/scripts/council.py
index bf3bd1f..1495639 100755
--- a/skills/democracy/scripts/council.py
+++ b/skills/democracy/scripts/council.py
@@ -89,7 +89,7 @@ def write_claim(path: Path, office: str, sid: str, runtime: str, work: str) -> N
         "session": sid,
         "runtime": runtime,
         "name": live_sessions().get(sid),
-        "since": datetime.datetime.now(datetime.timezone.utc).isoformat(timespec="seconds"),
+        "since": datetime.datetime.now(datetime.UTC).isoformat(timespec="seconds"),
         "beat": time.time(),
         "work": work,
     }