diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index dc63fdd..e761ea7 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -51,14 +51,14 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        python-version: ['3.7', '3.8', '3.9', '3.10']
+        python-version: ['3.9', '3.10']
         include:
-        - python-version: '3.8'
+        - python-version: '3.9'
           push-package: true
         - os: windows-2019
-          python-version: '3.8'
+          python-version: '3.9'
         - os: macos-latest
-          python-version: '3.8'
+          python-version: '3.9'
 
     steps:
       - uses: actions/checkout@v2
diff --git a/.python-version b/.python-version
index 4351a7e..2739029 100644
--- a/.python-version
+++ b/.python-version
@@ -1 +1 @@
-3.8.7
+3.9.17
diff --git a/Dockerfile b/Dockerfile
index 8832eb9..6d74664 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM python:3.8.8-slim-buster as base
+FROM python:3.9-slim-buster as base
 
 
 # shared between builder and runtime image