diff --git a/dummy/Dockerfile b/dummy/Dockerfile
index 05749ee..c3a2486 100644
--- a/dummy/Dockerfile
+++ b/dummy/Dockerfile
@@ -7,7 +7,7 @@ RUN go mod download
 
 RUN go build -o app
 
-FROM alpine:3.19 AS release
+FROM alpine:3.23@sha256:865b95f46d98cf867a156fe4a135ad3fe50d2056aa3f25ed31662dff6da4eb62 AS release
 
 WORKDIR /
 
diff --git a/service-catalog/Dockerfile b/service-catalog/Dockerfile
index 4f2bd51..907d733 100644
--- a/service-catalog/Dockerfile
+++ b/service-catalog/Dockerfile
@@ -7,7 +7,7 @@ RUN go mod download
 
 RUN go build -o app
 
-FROM alpine:3.19 AS release
+FROM alpine:3.23@sha256:865b95f46d98cf867a156fe4a135ad3fe50d2056aa3f25ed31662dff6da4eb62 AS release
 
 WORKDIR /