diff --git a/Dockerfile b/Dockerfile
index 11590f2..c615801 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -12,7 +12,7 @@ RUN apk upgrade --no-cache && \
 RUN go get -d -v && gofmt -l ./ && go build .
 
 # STEP 2 build the image including only the binary
-FROM alpine:3.15.0@sha256:21a3deaa0d32a8057914f36584b5288d2e5ecc984380bc0118285c70fa8c9300
+FROM alpine:3.15.1@sha256:d6d0a0eb4d40ef96f2310ead734848b9c819bb97c9d846385c4aca1767186cd4
 
 RUN apk --no-cache add ca-certificates && \
     adduser -D -h /usr/local/filtron -s /bin/false filtron filtron