diff --git a/README.md b/README.md
index a51544c..6b1931c 100644
--- a/README.md
+++ b/README.md
@@ -15,6 +15,7 @@
 * [NGINX](#nginx)
 * [The ckanext-envvars extension](#envvars)
 * [The CKAN_SITE_URL parameter](#CKAN_SITE_URL)
+* [Changing the base image](#Changing-the-base-image)
 
 
 ## 1.  Overview
@@ -233,3 +234,8 @@ For more information please see [ckanext-envvars](https://github.com/okfn/ckanex
 ## 12. CKAN_SITE_URL
 
 For convenience the CKAN_SITE_URL parameter should be set in the .env file. For development it can be set to http://localhost:5000 and non-development set to https://localhost:8443
+
+## 13. Changing the base image
+
+The base image used in the CKAN Dockerfile and Dockerfile.dev can be changed so a different DockerHub image is used eg: ckan/ckan-base:2.9.9
+could be used instead of ckan/ckan-base:2.10.1
diff --git a/ckan/Dockerfile b/ckan/Dockerfile
index 89b67a8..75001e9 100644
--- a/ckan/Dockerfile
+++ b/ckan/Dockerfile
@@ -1,5 +1,5 @@
-FROM ckan/ckan-base:ckan-2.10.0
-#FROM ckan/ckan-base:dev-v2.10
+FROM ckan/ckan-base:2.10.1
+#FROM ckan/ckan-base:2.9.9
 
 # Set up environment variables
 ENV APP_DIR=/srv/app
diff --git a/ckan/Dockerfile.dev b/ckan/Dockerfile.dev
index cd97021..8488f0b 100644
--- a/ckan/Dockerfile.dev
+++ b/ckan/Dockerfile.dev
@@ -1,4 +1,5 @@
-FROM ckan/ckan-base:ckan-2.10.0-dev
+FROM ckan/ckan-base:2.10.1-dev
+#FROM ckan/ckan-base:2.9.9-dev
 
 
 # Set up environment variables