diff --git a/Dockerfile b/Dockerfile
index f40b3bc..b323f52 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,7 +1,7 @@
 # syntax=docker/dockerfile:1
 
 ## Build stage
-FROM golang:1.21.4-alpine as build
+FROM golang:1.21.5-alpine@sha256:feceecc0e1d73d085040a8844de11a2858ba4a0c58c16a672f1736daecc2a4ff as build
 
 RUN apk --no-cache add ca-certificates tzdata
 RUN addgroup --gid 65532 kani && \