diff --git a/Dockerfile b/Dockerfile
index e1e6f4a..2717083 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -13,7 +13,7 @@ RUN <<EOF
   go build -v -o app
 EOF
 
-FROM alpine:3.20.3
+FROM alpine:3.21.0
 WORKDIR /
 RUN apk add --no-cache ca-certificates
 COPY --from=builder /go/src/github.com/mxssl/selectel-billing-exporter .
diff --git a/Dockerfile.ci b/Dockerfile.ci
index 732c9db..eee9571 100644
--- a/Dockerfile.ci
+++ b/Dockerfile.ci
@@ -1,5 +1,5 @@
 # syntax=docker/dockerfile:1
-FROM alpine:3.20.3
+FROM alpine:3.21.0
 WORKDIR /
 RUN <<EOF
   apk add --no-cache ca-certificates