diff --git a/trillian/examples/deployment/docker/ctfe/Dockerfile b/trillian/examples/deployment/docker/ctfe/Dockerfile
index ac7431ed08..2c953964dc 100644
--- a/trillian/examples/deployment/docker/ctfe/Dockerfile
+++ b/trillian/examples/deployment/docker/ctfe/Dockerfile
@@ -1,4 +1,4 @@
-FROM golang:1.21.5-bookworm@sha256:2d3b13c2a6368032e9697e64e7c923184e6e3be03cf01eadff27de124114e64e as build
+FROM golang:1.21.6-bookworm@sha256:b651ed8e3316720203ec18cbf8fa16a0f30d686b0ba5207f77ca5ae10d55da77 as build
 
 ARG GOFLAGS=""
 ENV GOFLAGS=$GOFLAGS