diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index a2731fac..42cf7220 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -1,16 +1,47 @@
 # Contributing to Streamz
 
 ## Streamz Conda Environment
-For the convenience of the community streamz offers an environment file for contributors to create conda environments. A few basic quick start commands for creating a using a streamz conda environment are found below.
+For CI, streamz uses environment files to create conda environments.
+Contributors can reuse those files to create development environments. A few
+basic quick start commands for creating a using a streamz conda environment
+are found below.
+
+Environment files exist for all supported version under:
+```shell
+./ci/environment-py${VERSION}.yml
+```
 
 ### Creating Conda Development Environment
-Creating the streamz conda environment can be achieved by simply running ```conda env create -f ./conda/environments/streamz_dev.yml```
+Creating a streamz conda environment can be achieved by running
+```shell
+export VERSION="314"
+conda env create -f "./ci/environment-py$VERSION.yml" -n "streamz$VERSION"
+conda activate "streamz${VERSION}"
+pip install flake8
+pip install --editable=. --no-deps
+```
 
 ### Using Conda Environment
-The streamz conda environment can be activated by running ```conda activate streamz_dev```
+The streamz conda environment can be activated in the future by running
+```shell
+conda activate "streamz${VERSION}"
+```
 
-### Run Software Tests
+### Creating a Non-Conda Environment
+If you do not want to use conda, there is a ```requirements-test.txt``` file
+in the proejct root that will install packages into the current python
+environment:
 ```shell
 pip install --editable=. --requirement=requirements-test.txt
-pytest -vvv
+pip install flake8
 ```
+We do not use it for CI, so please submit a PR to update it if you notice
+that it has drifted away from the conda environments. (I.e. you cannot run
+the tests.)
+
+### Run Software Tests
+Once you activate your environment of choice, running pytest and flake8 will work:
+```shell
+pytest -vvv
+flake8 streamz
+```
\ No newline at end of file
diff --git a/docs/source/conf.py b/docs/source/conf.py
index d307fc8f..ef64aef2 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -163,6 +163,3 @@
      author, 'Streamz', 'Support for pipelines managing continuous streams of data.',
      'Miscellaneous'),
 ]
-
-
-
diff --git a/examples/map_failure_modes.py b/examples/map_failure_modes.py
index 4fd11d10..ff4e1aac 100644
--- a/examples/map_failure_modes.py
+++ b/examples/map_failure_modes.py
@@ -28,7 +28,9 @@ async def main(run_flags):
     s_sync.sink(print, sync_source.name)
 
     async_stopping_source = make_counter("async stopping")
-    s_async_stop = async_stopping_source.rate_limit("500ms").map_async(flaky_async, async_stopping_source, stop_on_exception=True)
+    s_async_stop = (async_stopping_source
+                    .rate_limit("500ms")
+                    .map_async(flaky_async, async_stopping_source, stop_on_exception=True))
     s_async_stop.sink(print, async_stopping_source.name)
 
     if run_flags[0]:
diff --git a/examples/river_kmeans.py b/examples/river_kmeans.py
index 4acbaf16..b3ae432a 100644
--- a/examples/river_kmeans.py
+++ b/examples/river_kmeans.py
@@ -2,21 +2,22 @@
 import random
 import time
 
+import holoviews as hv
 import pandas as pd
-
+import panel as pn
+from hvplot import streamz  # noqa: F401  # this monkeypatches streamz.dataframe
+from panel.pane.holoviews import HoloViews
+from river import cluster
 from streamz import Stream
-import hvplot.streamz
 from streamz.river import RiverTrain
-from river import cluster
-import holoviews as hv
-from panel.pane.holoviews import HoloViews
-import panel as pn
+
 hv.extension('bokeh')
 
 model = cluster.KMeans(n_clusters=3, sigma=0.1, mu=0.5)
 centres = [[random.random(), random.random()] for _ in range(3)]
 count = [0]
 
+
 def gen(move_chance=0.05):
     centre = int(random.random() * 3)  # 3x faster than random.randint(0, 2)
     if random.random() < move_chance:
@@ -101,7 +102,6 @@ def start(event):
 
         def stop(event):
             print(count, "events")
-            global t0
             t_spent = time.time() - t0
             print("frequency", count[0] / t_spent, "Hz")
             print("Current centres", centres)
@@ -128,5 +128,6 @@ def stop(event):
         print("Output centres", [list(c.values()) for c in model.centers.values()])
         s.stop()
 
+
 if __name__ == "__main__":
     main(viz=True)
diff --git a/examples/scrape.py b/examples/scrape.py
index f687835c..cc381987 100644
--- a/examples/scrape.py
+++ b/examples/scrape.py
@@ -14,7 +14,7 @@ def links_of_page(content_page):
     domain = '%s://%s' % (uri.scheme, uri.netloc)
     try:
         soup = BeautifulSoup(content, features="html.parser")
-    except:
+    except Exception:
         return []
     else:
         links = [link.get('href') for link in soup.find_all('a')]
diff --git a/setup.py b/setup.py
index 78099d67..98702a86 100755
--- a/setup.py
+++ b/setup.py
@@ -17,7 +17,7 @@
       license='BSD',
       keywords='streams',
       packages=packages + tests,
-      python_requires='>=3.9',
+      python_requires='>=3.10',
       long_description=(open('README.rst').read() if exists('README.rst')
                         else ''),
       install_requires=list(open('requirements.txt').read().strip().split('\n')),