diff --git a/integration/Dockerfile b/integration/Dockerfile
index d6dc9e9f83..0535db398d 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:buster@sha256:fd9306e1c664bd49a11d4a4a04e41303430e069e437d137876e9290a555e06fb as ct_testbase
+FROM golang:buster@sha256:eb3f9ac805435c1b2c965d63ce460988e1000058e1f67881324746362baf9572 as ct_testbase
 
 WORKDIR /testbase