diff --git a/Dockerfile b/Dockerfile
index 0a63236..099cab2 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM rocker/binder:4.3.1
+FROM rocker/binder:4.3.2
 
 USER root
 
diff --git a/requirements.txt b/requirements.txt
index 2d54ab9..44d312e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,4 +6,4 @@ nbgitpuller==1.2.0
 
 jupyter-shiny-proxy==1.1
 # Based on request from Nathan Taback
-otter-grader==4.3.4
+otter-grader==5.2.2