diff --git a/Dockerfile b/Dockerfile
index e9e70b8..cb4c6ed 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 # Stage 1: Build the Go application
-FROM golang:1.21.3
+FROM golang:1.21.9@sha256:7d0dcbe5807b1ad7272a598fbf9d7af15b5e2bed4fd6c4c2b5b3684df0b317dd
 
 # Set the working directory inside the container
 WORKDIR /app