diff --git a/.github/workflows/python-package.yml b/.github/workflows/python-package.yml
index 5e78f6b..6572054 100644
--- a/.github/workflows/python-package.yml
+++ b/.github/workflows/python-package.yml
@@ -5,23 +5,23 @@ name: Python package
 
 on:
   push:
-    branches: [ master, dev, v0.2, v0.3, v0.4]
+    branches: [ master, dev]
   pull_request:
-    branches: [ master, dev, v0.2, v0.3, v0.4]
+    branches: [ master, dev, v0.7]
 
 jobs:
   build:
 
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     strategy:
       fail-fast: false
       matrix:
-        python-version: [3.6, 3.7, 3.8, 3.9, '3.10', 3.11]
+        python-version: [3.8, 3.9, '3.10', 3.11]
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v4
+      uses: actions/setup-python@v5
       with:
         python-version: ${{ matrix.python-version }}
     - name: Install dependencies
@@ -40,4 +40,4 @@ jobs:
         coverage run -m unittest discover tests
         coverage report -m
     - name: Upload Coverage to Codecov
-      uses: codecov/codecov-action@v3
+      uses: codecov/codecov-action@v4
diff --git a/README.md b/README.md
index c9a6126..aea83c2 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 [![Active Development](https://img.shields.io/badge/Maintenance%20Level-Actively%20Developed-brightgreen.svg)](https://gist.github.com/cheerfulstoic/d107229326a01ff0f333a1d3476e068d) 
 ![coverage](https://raw.githubusercontent.com/trevismd/statannotations/master/coverage.svg)  
-![Python](https://img.shields.io/badge/Python-3.6%2B-blue)
+![Python](https://img.shields.io/badge/Python-3.8--3.11-blue)
 [![Documentation Status](https://readthedocs.org/projects/statannotations/badge/?version=latest)](https://statannotations.readthedocs.io/en/master/?badge=latest)
 [![DOI](https://zenodo.org/badge/296015778.svg)](https://zenodo.org/badge/latestdoi/296015778)
 
diff --git a/requirements.txt b/requirements.txt
index c7dd725..89c6166 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,6 @@
-numpy>=1.12.1
+numpy<=1.26.4,>=1.12.1
 seaborn>=0.9.0,<0.12
-matplotlib>=2.2.2
+matplotlib>=2.2.2,<3.9
 pandas>=0.23.0,<2.0.0
 scipy>=1.1.0
 statsmodels