diff --git a/.github/workflows/github-action-test.yaml b/.github/workflows/github-action-test.yaml
index c1644e8..39ef5f2 100644
--- a/.github/workflows/github-action-test.yaml
+++ b/.github/workflows/github-action-test.yaml
@@ -6,7 +6,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, windows-latest, macos-latest]
-        python-version: ["3.10", "3.11", "3.12"]
+        python-version: ["3.10", "3.11"]
 
     steps:
       - uses: actions/checkout@v2
@@ -38,4 +38,4 @@ jobs:
           message: ${{ env.total }}%
           minColorRange: 50
           maxColorRange: 90
-          valColorRange: ${{ env.total }}
\ No newline at end of file
+          valColorRange: ${{ env.total }}
diff --git a/README.md b/README.md
index 8e99a68..ee33184 100644
--- a/README.md
+++ b/README.md
@@ -20,7 +20,7 @@
 
 <p align="center">
     <a href="https://www.python.org">
-        <img src="https://img.shields.io/badge/Python-3.10%20|%203.11%20|%203.12-blue" alt="Python: 3.10 - 3.12" style="max-width: 100%;">
+        <img src="https://img.shields.io/badge/Python-3.10%20|%203.11-blue" alt="Python: 3.10 - 3.11" style="max-width: 100%;">
     </a>
     <a href="https://pytest.org">
         <img src="https://img.shields.io/badge/Testing_framework-pytest-a04000" alt="Testing framework: pytest" style="max-width: 100%;">
@@ -36,4 +36,3 @@
 ## Description
 
 Welcome to ifk-lantmateriet. This repo contains code to parse data from Lantmäteriet.
-
diff --git a/pyproject.toml b/pyproject.toml
index 1a9c145..d612f5d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -11,7 +11,7 @@ readme = "README.md"
 authors = [
     { name = "Mladen Gibanica", email = "11275336+mgcth@users.noreply.github.com" },
 ]
-requires-python = ">=3.9"
+requires-python = ">=3.10,<3.12"
 dependencies = [
     "geopandas ~= 0.14",
     "pyogrio ~= 0.7",