diff --git a/Dockerfile b/Dockerfile
index ab199aa..51c5b67 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM debian:10
+FROM debian:11
 
 MAINTAINER Paul Warren <pwarren@pwarren.id.au>
 
diff --git a/app/app.py b/app/app.py
index 96bb61c..4c18322 100644
--- a/app/app.py
+++ b/app/app.py
@@ -10,6 +10,8 @@ usage = """
 Post image Data to /desteg and receive a copy of that image with the least significant bits XORed with system entropy
 
 Example: curl -H "Content-Type: application/png" --data-binary @image.png http://localhost:5002/desteg -o image_destegged.png
+
+Updated 2022-08-11
 """
 
 @app.route("/desteg", methods=["GET"])
diff --git a/requirements.txt b/requirements.txt
index 2fc06da..a1a557b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-numpy==1.16.2
+numpy>=1.16.2
 Flask>=2.0.3
-Pillow==6.2.0
-gunicorn==20.0.4
+Pillow>=6.2.0
+gunicorn>=20.0.4