diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 64dfe6e..aeaac70 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -10,10 +10,10 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - name: Set up go 1.20
+      - name: Set up go 1.21
         uses: actions/setup-go@v3
         with:
-          go-version: "1.20"
+          go-version: "1.21"
         id: go
 
       - name: Checkout
@@ -28,7 +28,7 @@ jobs:
       - name: Run linters
         uses: golangci/golangci-lint-action@v3
         with:
-          version: v1.53.3
+          version: v1.56.2
         env:
           TZ: "Etc/UTC"
 
@@ -98,12 +98,12 @@ jobs:
     needs: build
     runs-on: ubuntu-latest
     env: 
-      goreleaser_version: "v1.20.0"
+      goreleaser_version: "v1.24.0"
     steps:
-      - name: Set up go 1.20
+      - name: Set up go 1.21
         uses: actions/setup-go@v3
         with:
-          go-version: "1.20"
+          go-version: "1.21"
         id: go
 
       - name: Checkout
diff --git a/.golangci.yml b/.golangci.yml
index 2f1353f..6dac81b 100644
--- a/.golangci.yml
+++ b/.golangci.yml
@@ -19,6 +19,11 @@ linters-settings:
     locale: US
   lll:
     line-length: 140
+  gocritic:
+    enabled-tags:
+      - performance
+      - style
+      - experimental
 
 linters:
   enable:
@@ -49,6 +54,7 @@ issues:
   exclude-rules:
     - path: _test\.go
       linters:
+        - gocritic
         - gosec
     - text: "at least one file in a package should have a package comment"
       linters:
diff --git a/Dockerfile b/Dockerfile
index 79272f6..c4c5ade 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,6 +1,6 @@
 ARG REPO_BUILD_TAG="unknown"
 
-FROM golang:1.20-alpine AS builder
+FROM golang:1.21-alpine3.19 AS builder
 ARG REPO_BUILD_TAG
 WORKDIR /go/src/github.com/woblerr/authlog_exporter
 COPY . .
@@ -11,7 +11,7 @@ RUN apk update \
         -ldflags "-X main.version=${REPO_BUILD_TAG}" \
         -o authlog_exporter authlog_exporter.go
 
-FROM alpine:3.17
+FROM alpine:3.19
 ARG REPO_BUILD_TAG
 RUN apk add --no-cache --update ca-certificates \
     && rm -rf /var/cache/apk/*
diff --git a/Dockerfile.artifacts b/Dockerfile.artifacts
index 49e795f..db5a864 100644
--- a/Dockerfile.artifacts
+++ b/Dockerfile.artifacts
@@ -1,4 +1,4 @@
-FROM goreleaser/goreleaser:v1.20.0 as builder
+FROM goreleaser/goreleaser:v1.24.0 as builder
 WORKDIR /build
 COPY . /build
 RUN goreleaser release --snapshot --skip-publish --rm-dist
diff --git a/authlog_exporter_test.go b/authlog_exporter_test.go
index ba67b8d..6901dc0 100644
--- a/authlog_exporter_test.go
+++ b/authlog_exporter_test.go
@@ -41,7 +41,7 @@ func TestMain(t *testing.T) {
 	if err != nil {
 		t.Errorf("\nGet error during read resp body:\n%v", err)
 	}
-	if len(string(b)) == 0 {
+	if string(b) == "" {
 		t.Errorf("\nGet zero body:\n%s", string(b))
 	}
 }
diff --git a/go.mod b/go.mod
index c390e53..ace1d3c 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module github.com/woblerr/authlog_exporter
 
-go 1.20
+go 1.21
 
 require (
 	github.com/alecthomas/kingpin/v2 v2.3.2
diff --git a/go.sum b/go.sum
index 7d3eb8b..2c6e699 100644
--- a/go.sum
+++ b/go.sum
@@ -11,6 +11,7 @@ github.com/coreos/go-systemd/v22 v22.5.0/go.mod h1:Y58oyj3AT4RCenI/lSvhwexgC+NSV
 github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/fsnotify/fsnotify v1.4.9/go.mod h1:znqG4EE+3YCdAaPaxE2ZRY/06pZUdp0tY4IgpuI1SZQ=
 github.com/fsnotify/fsnotify v1.5.0 h1:NO5hkcB+srp1x6QmwvNZLeaOgbM8cmBTN32THzjvu2k=
 github.com/fsnotify/fsnotify v1.5.0/go.mod h1:BX0DCEr5pT4jm2CnQdVP1lFV521fcCNcyEeNp4DQQDk=
@@ -27,9 +28,11 @@ github.com/golang/protobuf v1.5.2 h1:ROPKBNFfQgOUMifHyP+KYbvpjbdoFNs+aK7DXlji0Tw
 github.com/golang/protobuf v1.5.2/go.mod h1:XVQd3VNwM+JqD3oG2Ue2ip4fOMUkwXdXDdiuN0vRsmY=
 github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/go-cmp v0.5.9 h1:O2Tfq5qg4qc4AmwVlvv0oLiVAGB7enBSJ2x2DqQFi38=
+github.com/google/go-cmp v0.5.9/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
 github.com/jpillora/backoff v1.0.0 h1:uvFg412JmmHBHw7iwprIxkPMI+sGQ4kzOWsMeHnm2EA=
 github.com/jpillora/backoff v1.0.0/go.mod h1:J/6gKK9jxlEcS3zixgDgUAsiuZ7yrSoa/FX5e0EB2j4=
 github.com/kr/pretty v0.3.1 h1:flRD4NNwYAUpkphVc1HcthR4KEIFJ65n8Mw5qdRn3LE=
+github.com/kr/pretty v0.3.1/go.mod h1:hoEshYVHaxMs3cyo3Yncou5ZscifuDolrwPKZanG3xk=
 github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
 github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
 github.com/matttproud/golang_protobuf_extensions v1.0.4 h1:mmDVorXM7PCGKw94cs5zkfA9PSy5pEvNWRP0ET0TIVo=
@@ -61,6 +64,7 @@ github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81P
 github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 github.com/stretchr/testify v1.8.2 h1:+h33VjcLVPDHtOdpUCuF+7gSuG3yGIftsP1YvFihtJ8=
+github.com/stretchr/testify v1.8.2/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o6fzry7u4=
 github.com/xhit/go-str2duration/v2 v2.1.0 h1:lxklc02Drh6ynqX+DdPyp5pCKLUQpRT8bp8Ydu2Bstc=
 github.com/xhit/go-str2duration/v2 v2.1.0/go.mod h1:ohY8p+0f07DiV6Em5LKB0s2YpLtXVyJfNt1+BlmyAsU=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
@@ -94,6 +98,7 @@ google.golang.org/protobuf v1.33.0 h1:uNO2rsAINq/JlFpSdYEKIZ0uKD/R9cpdv0T+yoGwGm
 google.golang.org/protobuf v1.33.0/go.mod h1:c6P6GXX6sHbq/GpV6MGZEdwhWPcYBgnhAHhKbcUYpos=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
+gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=
 gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7 h1:uRGJdciOHaEIrze2W8Q3AKkepLTh2hOroT7a+7czfdQ=
 gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWDmTeBkI65Dw0HsyUHuEVlX15mw=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
@@ -101,3 +106,4 @@ gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
 gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=