diff --git a/Dockerfile b/Dockerfile
index e489d56..9052a8c 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 # Set the base image
-FROM golang:1.21-alpine as builder
+FROM golang:1.20-alpine as builder
 RUN apk --no-cache add ca-certificates git
 # Set the working directory
 WORKDIR /app
@@ -11,7 +11,7 @@ COPY . .
 RUN go build -o notatio
 
 # Switch to the base Alpine image
-FROM alpine:latest
+FROM docker.io/library/alpine:3.18.4
 
 # Set the user and working directory
 RUN adduser -D notatio
@@ -31,6 +31,6 @@ RUN chmod +x wait.sh
 # Wait for 10 seconds before starting the application
 ENTRYPOINT ["sh", "-c", "sleep 10 && cd && ./notatio"]
 LABEL name=notatio version=latest
-
+EXPOSE 9991
 HEALTHCHECK --interval=5m --timeout=3s \
   CMD curl -f http://localhost/ || exit 1
\ No newline at end of file