diff --git a/Dockerfile b/Dockerfile
index d545b5f..52d6789 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM golang:1.15-alpine3.13 AS builder
+FROM golang:1.16-alpine3.13 AS builder
 LABEL maintainer="guessi <guessi@gmail.com>"
 RUN apk add --no-cache git ca-certificates
 WORKDIR ${GOPATH}/src/github.com/guessi/ssl-certs-checker
diff --git a/go.mod b/go.mod
index bf8b713..2080976 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module github.com/guessi/ssl-certs-checker
 
-go 1.15
+go 1.16
 
 require (
 	github.com/go-openapi/strfmt v0.20.0 // indirect