diff --git a/Dockerfile b/Dockerfile
index f376c48..1fb534a 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,5 @@
-FROM rocker/rstudio:4.5.1
+FROM rocker/rstudio:4.2.1 
+# rstudio 2022.07.2+576
 
 # NB: this file is only used by rocker if the env var DISABLE_AUTH: true is specified in the application.yml
 RUN echo "www-frame-origin=same" >> /etc/rstudio/disable_auth_rserver.conf