diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 37c4d8e..456d267 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -51,6 +51,23 @@ repos:
       # - id: sort-simple-yaml
       - id: trailing-whitespace
 
+  - repo: https://github.com/igorshubovych/markdownlint-cli
+    rev: v0.33.0
+    hooks:
+      - id: markdownlint
+        args: ["--disable", "MD013"]
+
+  # - repo: https://github.com/markdownlint/markdownlint
+  #   rev: v0.12.0
+  #   hooks:
+  #     - id: markdownlint
+
+  - repo: https://github.com/charliermarsh/ruff-pre-commit
+    rev: "v0.0.257"
+    hooks:
+      - id: ruff
+        args: [--fix, --exit-non-zero-on-fix]
+
   - repo: https://github.com/asottile/add-trailing-comma
     rev: v2.4.0
     hooks:
@@ -141,16 +158,5 @@ repos:
   #    hooks:
   #      - id: codespell
 
-  - repo: https://github.com/igorshubovych/markdownlint-cli
-    rev: v0.33.0
-    hooks:
-      - id: markdownlint
-        args: ["--disable", "MD013"]
-
-  # - repo: https://github.com/markdownlint/markdownlint
-  #   rev: v0.12.0
-  #   hooks:
-  #     - id: markdownlint
-
 default_language_version:
   python: python3.10
diff --git a/1fetch.py b/1fetch.py
index 3f32b02..a12c0ff 100755
--- a/1fetch.py
+++ b/1fetch.py
@@ -35,11 +35,11 @@ def fetch_data_summaries() -> None:
         print(f"fetching {data_summary_set} data")
         # url = "https://api.ouraring.com/v1/sleep"
         # -> last week
-        url = f"https://api.ouraring.com/v1/{data_summary_set}?start={config['date_start']}"
+        url = f"https://api.ouraring.com/v1/{data_summary_set}?start={config['date_start']}"  # noqa: E501
         # start=YYYY-MM-DD
         # end=YYYY-MM-DD
         headers = {
-            # "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:75.0) Gecko/20100101 Firefox/75.0 ",
+            # "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:75.0) Gecko/20100101 Firefox/75.0 ", # noqa: E501
             "Authorization": f"Bearer {token}",
         }
         cont = requests.get(url, headers=headers, timeout=3).content
diff --git a/2analyze.py b/2analyze.py
index 9fe4ff0..aa0ebcd 100755
--- a/2analyze.py
+++ b/2analyze.py
@@ -85,7 +85,8 @@ def prep_data_sleep() -> pd.DataFrame:
 
     df["time to fall asleep"] = df["onset_latency"] / 60
 
-    # df["time to fall asleep"].where(df["time to fall asleep"] > 100, 100, inplace=True)
+    # df["time to fall asleep"].where(df["time to fall asleep"]
+    #                                 > 100, 100, inplace=True)
 
     df["time awake"] = df["awake"] / 60