diff --git a/dodona-scheme.dockerfile b/dodona-scheme.dockerfile
index fcd04b8..ca3e549 100644
--- a/dodona-scheme.dockerfile
+++ b/dodona-scheme.dockerfile
@@ -1,4 +1,4 @@
-FROM racket/racket:8.11
+FROM racket/racket:8.11.1
 
 # add generic tools
 RUN apt-get --allow-releaseinfo-change update \