diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index bb14922..8e2f820 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -10,7 +10,7 @@ repos:
     rev: stable
     hooks:
     - id: black
-      language_version: python3.8
+      language_version: python3.10
 -   repo: https://github.com/pre-commit/pre-commit-hooks
     rev: v2.1.0
     hooks:
diff --git a/.travis.yml b/.travis.yml
index 10ba67b..0f4b89a 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,7 +2,7 @@ dist: xenial
 
 language: python
 python:
-    - 3.8.1
+    - 3.10-dev
 install:
   - make install
 script:
diff --git a/README.md b/README.md
index b453caf..6cccc92 100644
--- a/README.md
+++ b/README.md
@@ -25,7 +25,7 @@ A service to send email messages.
 ## Development
 
 ### Requirements
-- [Python 3.8.1](https://realpython.com/intro-to-pyenv/)
+- [Python 3.10.0](https://realpython.com/intro-to-pyenv/)
 - [Docker](https://docs.docker.com/get-docker/)
 - [Docker Compose](https://docs.docker.com/compose/install/)
 
diff --git a/requirements-dev.txt b/requirements-dev.txt
index ede7f11..afe4dc3 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -2,7 +2,7 @@
 black==19.10b0
 flake8==3.8.1
 isort==5.6.4
-pre-commit==2.4.0
+pre-commit==2.15.0
 pytest-cov==2.8.1
-pytest==5.4.2
+pytest==6.2.5
 requests==2.23.0
diff --git a/runtime.txt b/runtime.txt
index c5d7ce3..fadb070 100644
--- a/runtime.txt
+++ b/runtime.txt
@@ -1 +1 @@
-python-3.8.1
+python-3.10.0