diff --git a/tox.ini b/tox.ini
index 07d5eb9..62e45b7 100644
--- a/tox.ini
+++ b/tox.ini
@@ -14,8 +14,8 @@ commands =
     echo "Canceling the test before completion creates __init__.py files \
         which could cause undesired behaviours. Make sure to delete the __init__.py files manually."
     ; Check for Python 3.5 compatibility to ensure Xenial support
-    mypy --ignore-missing-imports --python-version 3.5 {toxinidir}/lib/charms/layer/jenkins {posargs}
-    mypy --ignore-missing-imports --python-version 3.5 {toxinidir}/reactive {posargs}
+    mypy --ignore-missing-imports --python-version 3.8 {toxinidir}/lib/charms/layer/jenkins {posargs}
+    mypy --ignore-missing-imports --python-version 3.8 {toxinidir}/reactive {posargs}
     ; Execute unit tests
     touch {toxinidir}/lib/charms/__init__.py
     touch {toxinidir}/lib/charms/layer/__init__.py