diff --git a/Dockerfile b/Dockerfile
index eb0254c..1afe45d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.6 as alpine
+FROM alpine:3.19@sha256:51b67269f354137895d43f3b3d810bfacd3945438e94dc5ac55fdac340352f48 as alpine
 
 RUN apk add -U --no-cache ca-certificates
 
diff --git a/Dockerfile.build b/Dockerfile.build
index 394c24a..5f397f9 100644
--- a/Dockerfile.build
+++ b/Dockerfile.build
@@ -1,4 +1,4 @@
-FROM golang:1.21.5-alpine as build
+FROM golang:1.21.5-alpine@sha256:1ea9bc98b22d7d86dddb996c5a5390003fed6b89944ce268446a4b4a20ba0d39 as build
 
 WORKDIR /app