diff --git a/Dockerfile.ocp b/Dockerfile.ocp
index 5a0f84dcba..05c69b4b40 100644
--- a/Dockerfile.ocp
+++ b/Dockerfile.ocp
@@ -1,4 +1,4 @@
-FROM registry.svc.ci.openshift.org/ocp/builder:rhel-8-golang-openshift-4.6 AS builder
+FROM registry.svc.ci.openshift.org/ocp/builder:rhel-8-golang-1.15-openshift-4.6 AS builder
 WORKDIR /go/src/github.com/improbable-eng/thanos
 COPY . .
 ENV GOFLAGS="-mod=vendor"