diff --git a/Dockerfile b/Dockerfile
index 8aa61ef..29fe139 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM python:3.11-slim-buster
+FROM python:3.10-slim
 
 # Set the working directory to /pytket-phir
 WORKDIR /pytket-phir