diff --git a/protoc-builder/hack/Dockerfile.protobuf b/protoc-builder/hack/Dockerfile.protobuf
index 8de51bcb..d549ab3e 100644
--- a/protoc-builder/hack/Dockerfile.protobuf
+++ b/protoc-builder/hack/Dockerfile.protobuf
@@ -1,3 +1,3 @@
 # This Dockerfile exists to allow Dependabot to watch Homebrew builds of protobuf for triggering updates
 # We don't actually use the content of this image in the repo, as this is a dynamically linked version of protoc
-FROM ghcr.io/homebrew/core/protobuf:33.4@sha256:68f29c2b7ba1806379bd140964f16233c6a2dbffa6086b0531f36d2803105a80
+FROM ghcr.io/homebrew/core/protobuf:33.4_1@sha256:ad3bbfb4a4a6c5cca60e491807142c594f6323437a4438699d87e393945066a9