diff --git a/.github/workflows/docker.yml b/.github/workflows/docker.yml
index b62e092..46dbc7e 100644
--- a/.github/workflows/docker.yml
+++ b/.github/workflows/docker.yml
@@ -22,19 +22,19 @@ jobs:
         uses: actions/checkout@v3
       
       - name: Log in to Docker Hub
-        uses: docker/login-action
+        uses: docker/login-action@f054a8b539a109f9f41c372932f1ae047eff08c9
         with:
           username: ${{ secrets.DOCKER_USERNAME }}
           password: ${{ secrets.DOCKERHUB_TOKEN }}
       
       - name: Extract metadata (tags, labels) for Docker
         id: meta
-        uses: docker/metadata-action
+        uses: docker/metadata-action@98669ae865ea3cffbcbaa878cf57c20bbf1c6c38
         with:
           images: sebastienbarbier/seven23
       
       - name: Build and push Docker image
-        uses: docker/build-push-action
+        uses: docker/build-push-action@ad44023a93711e3deb337508980b4b5e9bcdc5dc
         with:
           context: .
           push: true
diff --git a/README.md b/README.md
index 8c48914..467e79a 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,6 @@
 
 [![Build action badge](https://github.com/sebastienbarbier/seven23_server/actions/workflows/django.yml/badge.svg?branch=main)](https://github.com/sebastienbarbier/seven23_server/actions/) [![Documentation Status](https://readthedocs.org/projects/seven23-server/badge/?version=latest)](https://seven23-server.readthedocs.io/en/latest/?badge=latest) [![License: MIT](https://img.shields.io/badge/License-MIT-green.svg)](https://github.com/sebastienbarbier/seven23_server/blob/main/LICENSE)
 
-
 Fully manual budget app to track your expenses. Completely opensource, with privacy by design.
 
 - [Seven23 official website](https://seven23.io/)
@@ -27,4 +26,4 @@ make docker-build
 make docker-run
 make docker-shell
 make docker-stop
-```
+```
\ No newline at end of file
diff --git a/requirements.txt b/requirements.txt
index 1c14936..7a90764 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -79,7 +79,7 @@ python-dateutil==2.8.2
 python-dotenv==1.0.0
 python3-openid==3.2.0
 pytz==2023.3
-PyYAML==6.0
+PyYAML==6.0.1
 rcssmin==1.1.1
 requests==2.28.2
 requests-oauthlib==1.3.1
@@ -114,4 +114,4 @@ urllib3==1.26.15
 watchdog==3.0.0
 whitenoise==6.4.0
 wrapt==1.15.0
-zipp==3.15.0
+zipp==3.15.0
\ No newline at end of file