diff --git a/Dockerfile.jsonschema b/Dockerfile.jsonschema
index 9aa00994..2133ef47 100644
--- a/Dockerfile.jsonschema
+++ b/Dockerfile.jsonschema
@@ -1,5 +1,5 @@
 # 3.18.2
-FROM alpine@sha256:1e42bbe2508154c9126d48c2b8a75420c3544343bf86fd041fb7527e017a4b4a
+FROM alpine@sha256:21dc6063fd678b478f57c0e13f47560d0ea4eeba26dfc947b2a4f81f686b9f45
 RUN apk add --update protoc protobuf-dev go git
 RUN go install github.com/chrusty/protoc-gen-jsonschema/cmd/protoc-gen-jsonschema@1.4.1
 # This is required to get the field_behavior.proto file