diff --git a/.pylintrc b/.pylintrc
index d9348b2..7b9da25 100644
--- a/.pylintrc
+++ b/.pylintrc
@@ -240,7 +240,7 @@ contextmanager-decorators=contextlib.contextmanager
 # system, and so shouldn't trigger E1101 when accessed. Python regular
 # expressions are accepted.
 # NOTE: We disable warnings for SQLAlchemy's query.filter/filter_by/join() methods.
-generated-members=filter,join
+generated-members=filter,join,session.query,session.add,session.commit
 
 # Tells whether missing members accessed in mixin class should be ignored. A
 # mixin class is detected if its name ends with "mixin" (case insensitive).
diff --git a/Dockerfile b/Dockerfile
index 84df730..f268192 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -5,7 +5,7 @@ FROM centos:8 AS base
 
 # update packages and install Python
 RUN dnf -y upgrade-minimal && \
-    dnf install -y python36 && \
+    dnf install -y python38 && \
     dnf clean all
 
 # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
@@ -13,13 +13,12 @@ RUN dnf -y upgrade-minimal && \
 FROM base AS build
 
 # set up a virtualenv
-RUN python3.6 -m venv /opt/venv
+RUN python3 -m venv /opt/venv
 ENV PATH="/opt/venv/bin:$PATH"
 RUN pip install --upgrade pip
 
 # install the application requirements
 COPY requirements.txt /tmp/
-RUN pip install --upgrade pip
 RUN pip install -r /tmp/requirements.txt
 
 # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
diff --git a/asl_articles/tests/test_import_roar_scenarios.py b/asl_articles/tests/test_import_roar_scenarios.py
index 6da8ac4..6c8b1bb 100644
--- a/asl_articles/tests/test_import_roar_scenarios.py
+++ b/asl_articles/tests/test_import_roar_scenarios.py
@@ -8,7 +8,7 @@ from asl_articles.models import Scenario
 from asl_articles.tests.utils import init_tests
 
 sys.path.append( os.path.join( os.path.split(__file__)[0], "../../tools/" ) )
-from import_roar_scenarios import import_roar_scenarios
+from import_roar_scenarios import import_roar_scenarios #pylint: disable=import-error,wrong-import-order
 
 # ---------------------------------------------------------------------
 
diff --git a/asl_articles/utils.py b/asl_articles/utils.py
index 314cf7c..0aebc52 100644
--- a/asl_articles/utils.py
+++ b/asl_articles/utils.py
@@ -85,7 +85,9 @@ def clean_html( val, allow_tags=None, safe_attrs=None ): #pylint: disable=too-ma
     # fixup smart quotes and dashes
     def replace_chars( val, ch, targets ):
         for t in targets:
-            if isinstance( t, typing.Pattern ):
+            # FUDGE! pylint is incorrectly flagging isinstance() when checking against typing.XXX.
+            #   https://github.com/PyCQA/pylint/issues/3537
+            if isinstance( t, typing.Pattern ): #pylint: disable=isinstance-second-argument-not-valid-type
                 val = t.sub( ch, val )
             else:
                 assert isinstance( t, str )
diff --git a/conftest.py b/conftest.py
index cd0fb6e..c660209 100644
--- a/conftest.py
+++ b/conftest.py
@@ -139,6 +139,7 @@ def webdriver( request ):
         options = wb.ChromeOptions()
         if headless:
             options.add_argument( "--headless" ) #pylint: disable=no-member
+        options.add_argument( "--disable-gpu" )
         driver = wb.Chrome( options=options )
     else:
         raise RuntimeError( "Unknown webdriver: {}".format( driver ) )
diff --git a/requirements-dev.txt b/requirements-dev.txt
index 0620b1d..7d96d7f 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -1,5 +1,5 @@
-pytest==5.2.2
+pytest==6.2.1
 selenium==3.141.0
-pylint==2.4.3
-pylint-flask-sqlalchemy==0.1.0
-pytest-pylint==0.14.1
+pylint==2.6.0
+pylint-flask-sqlalchemy==0.2.0
+pytest-pylint==0.18.0
diff --git a/requirements.txt b/requirements.txt
index e9e4696..b792703 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,8 +1,8 @@
-# python 3.7.5
+# python 3.8.7
 
-flask==1.1.1
-flask-sqlalchemy==2.4.1
-psycopg2-binary==2.8.4
-alembic==1.3.1
-pyyaml==5.1.2
-lxml==4.4.2
+flask==1.1.2
+flask-sqlalchemy==2.4.4
+psycopg2-binary==2.8.6
+alembic==1.4.3
+pyyaml==5.3.1
+lxml==4.6.2