diff --git a/README.md b/README.md
index 0766f96..f2cd24b 100644
--- a/README.md
+++ b/README.md
@@ -26,6 +26,8 @@ Run the WSGI application on a Linux/Mac command line from the repository root di
 gunicorn wsgi:application
 ```
 
+To do that you will have to have installed the Python package _gunicorn_, as per the listed requirement in `requirements.deploy.txt`
+
 ### Full documentation
      
 See the documentation at <https://rdflib.dev/VocPrez/>.
diff --git a/requirements.deploy.txt b/requirements.deploy.txt
index bc1cb0a..c89d166 100644
--- a/requirements.deploy.txt
+++ b/requirements.deploy.txt
@@ -1 +1 @@
-gunicorn==22.0.0
\ No newline at end of file
+gunicorn==23.0.0
\ No newline at end of file
diff --git a/requirements.txt b/requirements.txt
index 3f35942..aee7d5e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,11 +1,10 @@
 bs4==0.0.1
-flask==1.1.1
+Flask==2.3.1
 flask_compress==1.8.0
 flask-markdown==0.3
 markdown==3.2.1
-rdflib==6.0.0
-rdflib-jsonld==0.5.0
-requests==2.31.0
+rdflib==5.0.0
+requests==2.23.0
 pyldapi==3.13
 python-dateutil==2.8.1
-SPARQLWrapper==1.8.5
+SPARQLWrapper==1.8.5
\ No newline at end of file