diff --git a/integration/Dockerfile b/integration/Dockerfile
index aee9455cd7..38e7803f38 100644
--- a/integration/Dockerfile
+++ b/integration/Dockerfile
@@ -1,6 +1,6 @@
 # This Dockerfile builds a base image for the certificate-transparency-go CloudBuild integration testing.
 # See https://hub.docker.com/_/golang for the set of golang base images.
-FROM golang:1.21.6-bookworm@sha256:688ad7f282ce711cc28676531f45d5b840790e28a689fbd4e8e4ac181e23e9c4 as ct_testbase
+FROM golang:1.21.6-bookworm@sha256:1e8ea75170ea0c4653ceab6d37dd12644d1bb44347d1bae457e5d0475d1d26c4 as ct_testbase
 
 WORKDIR /testbase