diff --git a/.github/workflows/parpe_tests.yml b/.github/workflows/parpe_tests.yml
index b223dcdb..5d7d3c90 100644
--- a/.github/workflows/parpe_tests.yml
+++ b/.github/workflows/parpe_tests.yml
@@ -107,7 +107,7 @@ jobs:
 
     - name: Cache sonar files
       id: cache-sonar
-      uses: actions/cache@v3
+      uses: actions/cache@v4
       with:
         path: sonar_cache
         key: ${{ runner.os }}-sonar_cache
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index d97a84c9..389a1142 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -37,7 +37,7 @@ For any code contributions, please follow the guidelines below.
 
 ### Python 
 
-* We want to be compatible with Python 3.7
+* We want to be compatible with Python 3.9
 
 * For the Python code we want to follow 
   [PEP8](https://www.python.org/dev/peps/pep-0008/). Although this is not the