diff --git a/bi_or_not_bi/rstudio-server/rstudio-with-sparklyr/Dockerfile b/bi_or_not_bi/rstudio-server/rstudio-with-sparklyr/Dockerfile
index fdf36daf..db9a1488 100644
--- a/bi_or_not_bi/rstudio-server/rstudio-with-sparklyr/Dockerfile
+++ b/bi_or_not_bi/rstudio-server/rstudio-with-sparklyr/Dockerfile
@@ -1,4 +1,4 @@
-FROM rocker/rstudio
+FROM rocker/rstudio@sha256:ee7c4efa46f0b5d46e051393ef05f262aceb959463b15fc3648955965290d231
 
 
 RUN apt-get update \