diff --git a/Dockerfile b/Dockerfile
index b4562d3..bfdd988 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM golang:latest AS builder
+FROM golang:latest@sha256:f38c7f7bbaca5d664e39cd982a1cb5b6f8e999244e9ddb6ec8ba098438b3f4da AS builder
 
 WORKDIR /src
 COPY . .