diff --git a/Dockerfile b/Dockerfile
index 323bee5..5518e62 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 # v3.21.3
-FROM alpine@sha256:51183f2cfa6320055da30872f211093f9ff1d3cf06f39a0bdb212314c5dc7375 AS builder
+FROM alpine@sha256:865b95f46d98cf867a156fe4a135ad3fe50d2056aa3f25ed31662dff6da4eb62 AS builder
 
 RUN apk update --no-cache && apk add --no-cache go make
 
@@ -13,7 +13,7 @@ COPY . .
 RUN --mount=type=cache,target=/gomod-cache --mount=type=cache,target=/go-cache make build
 
  # v3.21.3
-FROM alpine@sha256:51183f2cfa6320055da30872f211093f9ff1d3cf06f39a0bdb212314c5dc7375
+FROM alpine@sha256:865b95f46d98cf867a156fe4a135ad3fe50d2056aa3f25ed31662dff6da4eb62
 
 WORKDIR /
 RUN mkdir /certs
diff --git a/Dockerfile.unsigned b/Dockerfile.unsigned
index 3cddb07..ad4592f 100644
--- a/Dockerfile.unsigned
+++ b/Dockerfile.unsigned
@@ -1,4 +1,4 @@
 # v3.21.3
-FROM alpine@sha256:51183f2cfa6320055da30872f211093f9ff1d3cf06f39a0bdb212314c5dc7375
+FROM alpine@sha256:865b95f46d98cf867a156fe4a135ad3fe50d2056aa3f25ed31662dff6da4eb62
 
 RUN echo "arbitrary string to avoid collision with signed image" > /dummyfile.txt