diff --git a/.drone.yml b/.drone.yml
index 7d8a596..b234d7c 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -9,7 +9,7 @@ platform:
 
 steps:
 - name: test
-  image: golang:1.17-alpine3.14
+  image: golang:1.17-alpine3.15
   commands:
   - go version
   - go fmt ./...
diff --git a/Dockerfile b/Dockerfile
index 6e76024..b2698b5 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM golang:1.17-alpine3.14 AS builder
+FROM golang:1.17-alpine3.15 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/README.md b/README.md
index b596856..ede34c0 100644
--- a/README.md
+++ b/README.md
@@ -33,7 +33,7 @@
     +--------------------+----------------+----------------+-------------------------------+-------------------------------+--------------------+------------+
     | Host               | Common Name    | DNS Names      | Not Before                    | Not After                     | PublicKeyAlgorithm | Issuer     |
     +--------------------+----------------+----------------+-------------------------------+-------------------------------+--------------------+------------+
-    | www.google.com:443 | www.google.com | www.google.com | 2021-10-18 10:15:56 +0000 UTC | 2022-01-10 10:15:55 +0000 UTC | ECDSA              | GTS CA 1C3 |
+    | www.google.com:443 | www.google.com | www.google.com | 2021-12-27 08:11:32 +0000 UTC | 2022-03-21 08:11:31 +0000 UTC | ECDSA              | GTS CA 1C3 |
     +--------------------+----------------+----------------+-------------------------------+-------------------------------+--------------------+------------+
 
 ## Build from Source