diff --git a/.circleci/config.yml b/.circleci/config.yml
index 62b6c26..cddb4a3 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -2,7 +2,7 @@ version: 2.1
 jobs:
   build-python:
     docker:
-      - image: cimg/python:3.9.13
+      - image: cimg/python:3.12.1
     steps:
       - checkout
       - run:
diff --git a/.python-version b/.python-version
new file mode 100644
index 0000000..171a6a9
--- /dev/null
+++ b/.python-version
@@ -0,0 +1 @@
+3.12.1