diff --git a/.github/workflows/lint.yaml b/.github/workflows/lint.yaml
new file mode 100644
index 00000000..500ef349
--- /dev/null
+++ b/.github/workflows/lint.yaml
@@ -0,0 +1,31 @@
+---
+name: Lint
+
+on:
+  push:
+    branches: [ master ]
+    paths-ignore: [ '**.md' ]
+  pull_request:
+    branches: [ master ]
+    paths-ignore: [ '**.md' ]
+
+env:
+  GO_VERSION: 1.19
+
+jobs:
+  lint:
+    name: Lint
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
+    steps:
+      - uses: actions/setup-go@v3
+        with:
+          go-version: '1.19'
+
+      - name: Checkout code
+        uses: actions/checkout@v3
+
+      - name: Golangci lint
+        uses: golangci/golangci-lint-action@v3
+        with:
+          version: v1.51.0
diff --git a/.golangci.yaml b/.golangci.yaml
new file mode 100644
index 00000000..ed5ebd34
--- /dev/null
+++ b/.golangci.yaml
@@ -0,0 +1,360 @@
+# This file contains all available configuration options
+# with their default values.
+
+# options for analysis running
+run:
+  # default concurrency is a available CPU number
+  # concurrency: 4
+
+  # timeout for analysis, e.g. 30s, 5m, default is 1m
+  timeout: 30m
+
+  # exit code when at least one issue was found, default is 1
+  issues-exit-code: 1
+
+  # include test files or not, default is true
+  tests: true
+
+  # list of build tags, all linters use it. Default is empty list.
+  # build-tags:
+  #   - mytag
+
+  # which dirs to skip: issues from them won't be reported;
+  # can use regexp here: generated.*, regexp is applied on full path;
+  # default value is empty list, but default dirs are skipped independently
+  # from this option's value (see skip-dirs-use-default).
+  # skip-dirs:
+  #   - src/external_libs
+  #   - autogenerated_by_my_lib
+
+  # default is true. Enables skipping of directories:
+  #   vendor$, third_party$, testdata$, examples$, Godeps$, builtin$
+  skip-dirs-use-default: true
+
+  # which files to skip: they will be analyzed, but issues from them
+  # won't be reported. Default value is empty list, but there is
+  # no need to include all autogenerated files, we confidently recognize
+  # autogenerated files. If it's not please let us know.
+  # skip-files:
+  #   - ".*\\.my\\.go$"
+  #   - lib/bad.go
+
+  # by default isn't set. If set we pass it to "go list -mod={option}". From "go help modules":
+  # If invoked with -mod=readonly, the go command is disallowed from the implicit
+  # automatic updating of go.mod described above. Instead, it fails when any changes
+  # to go.mod are needed. This setting is most useful to check that go.mod does
+  # not need updates, such as in a continuous integration and testing system.
+  # If invoked with -mod=vendor, the go command assumes that the vendor
+  # directory holds the correct copies of dependencies and ignores
+  # the dependency descriptions in go.mod.
+  # modules-download-mode: readonly|release|vendor
+
+# output configuration options
+output:
+  # colored-line-number|line-number|json|tab|checkstyle|code-climate, default is "colored-line-number"
+  format: line-number
+
+  # print lines of code with issue, default is true
+  print-issued-lines: true
+
+  # print linter name in the end of issue text, default is true
+  print-linter-name: true
+
+# all available settings of specific linters
+linters-settings:
+  gci:
+    sections:
+      - standard
+      - default
+      - prefix(github.com/databus23/helm-diff/v3)
+
+  errcheck:
+    # report about not checking of errors in type assetions: `a := b.(MyStruct)`;
+    # default is false: such cases aren't reported by default.
+    check-type-assertions: false
+
+    # report about assignment of errors to blank identifier: `num, _ := strconv.Atoi(numStr)`;
+    # default is false: such cases aren't reported by default.
+    check-blank: false
+
+    # [deprecated] comma-separated list of pairs of the form pkg:regex
+    # the regex is used to ignore names within pkg. (default "fmt:.*").
+    # see https://github.com/kisielk/errcheck#the-deprecated-method for details
+    # ignore: fmt:.*
+
+    # path to a file containing a list of functions to exclude from checking
+    # see https://github.com/kisielk/errcheck#excluding-functions for details
+    # exclude: /path/to/file.txt
+
+  # Disable error checking, as errorcheck detects more errors and is more configurable.
+  gosec:
+    exclude:
+    - "G104"
+
+  govet:
+    # report about shadowed variables
+    check-shadowing: false
+
+    # settings per analyzer
+    settings:
+      printf: # analyzer name, run `go tool vet help` to see all analyzers
+        funcs: # run `go tool vet help printf` to see available settings for `printf` analyzer
+          - (github.com/golangci/golangci-lint/pkg/logutils.Log).Infof
+          - (github.com/golangci/golangci-lint/pkg/logutils.Log).Warnf
+          - (github.com/golangci/golangci-lint/pkg/logutils.Log).Errorf
+          - (github.com/golangci/golangci-lint/pkg/logutils.Log).Fatalf
+
+    # enable or disable analyzers by name
+    # enable:
+    #   - atomicalign
+    # enable-all: false
+    # disable:
+    #   - shadow
+    # disable-all: false
+  golint:
+    # minimal confidence for issues, default is 0.8
+    min-confidence: 0.8
+  gofmt:
+    # simplify code: gofmt with `-s` option, true by default
+    simplify: true
+  goimports:
+    # put imports beginning with prefix after 3rd-party packages;
+    # it's a comma-separated list of prefixes
+    # local-prefixes: github.com/org/project
+  gocyclo:
+    # minimal code complexity to report, 30 by default (but we recommend 10-20)
+    min-complexity: 30
+  gocognit:
+    # minimal code complexity to report, 30 by default (but we recommend 10-20)
+    min-complexity: 100
+  maligned:
+    # print struct with more effective memory layout or not, false by default
+    suggest-new: true
+  dupl:
+    # tokens count to trigger issue, 150 by default
+    threshold: 100
+  goconst:
+    # minimal length of string constant, 3 by default
+    min-len: 3
+    # minimal occurrences count to trigger, 3 by default
+    min-occurrences: 8
+  # depguard:
+  #   list-type: blacklist
+  #   include-go-root: false
+  #   packages:
+  #     - github.com/sirupsen/logrus
+  #   packages-with-error-messages:
+  #     # specify an error message to output when a blacklisted package is used
+  #     github.com/sirupsen/logrus: "logging is allowed only by logutils.Log"
+  misspell:
+    # Correct spellings using locale preferences for US or UK.
+    # Default is to use a neutral variety of English.
+    # Setting locale to US will correct the British spelling of 'colour' to 'color'.
+    locale: US
+    ignore-words:
+      - GitLab
+  lll:
+    # max line length, lines longer will be reported. Default is 120.
+    # '\t' is counted as 1 character by default, and can be changed with the tab-width option
+    line-length: 120
+    # tab width in spaces. Default to 1.
+    tab-width: 1
+  unused:
+    # treat code as a program (not a library) and report unused exported identifiers; default is false.
+    # XXX: if you enable this setting, unused will report a lot of false-positives in text editors:
+    # if it's called for subdir of a project it can't find funcs usages. All text editor integrations
+    # with golangci-lint call it on a directory with the changed file.
+    check-exported: false
+  unparam:
+    # Inspect exported functions, default is false. Set to true if no external program/library imports your code.
+    # XXX: if you enable this setting, unparam will report a lot of false-positives in text editors:
+    # if it's called for subdir of a project it can't find external interfaces. All text editor integrations
+    # with golangci-lint call it on a directory with the changed file.
+    check-exported: false
+  nakedret:
+    # make an issue if func has more lines of code than this setting and it has naked returns; default is 30
+    max-func-lines: 30
+  prealloc:
+    # XXX: we don't recommend using this linter before doing performance profiling.
+    # For most programs usage of prealloc will be a premature optimization.
+
+    # Report preallocation suggestions only on simple loops that have no returns/breaks/continues/gotos in them.
+    # True by default.
+    simple: true
+    range-loops: true # Report preallocation suggestions on range loops, true by default
+    for-loops: false # Report preallocation suggestions on for loops, false by default
+  gocritic:
+    # Which checks should be enabled; can't be combined with 'disabled-checks';
+    # See https://go-critic.github.io/overview#checks-overview
+    # To check which checks are enabled run `GL_DEBUG=gocritic golangci-lint run`
+    # By default list of stable checks is used.
+    # enabled-checks:
+    #   - rangeValCopy
+
+    # Which checks should be disabled; can't be combined with 'enabled-checks'; default is empty
+    # disabled-checks:
+    #   - regexpMust
+
+    # Enable multiple checks by tags, run `GL_DEBUG=gocritic golangci-lint run` to see all tags and checks.
+    # Empty list by default. See https://github.com/go-critic/go-critic#usage -> section "Tags".
+    # enabled-tags:
+    #   - performance
+
+    settings: # settings passed to gocritic
+      captLocal: # must be valid enabled check name
+        paramsOnly: true
+    # rangeValCopy:
+    #   sizeThreshold: 32
+  godox:
+    # report any comments starting with keywords, this is useful for TODO or FIXME comments that
+    # might be left in the code accidentally and should be resolved before merging
+    keywords: # default keywords are TODO, BUG, and FIXME, these can be overwritten by this setting
+      - TODO
+      - BUG
+      - FIXME
+      - NOTE
+      - OPTIMIZE # marks code that should be optimized before merging
+      - HACK # marks hack-arounds that should be removed before merging
+  dogsled:
+    # checks assignments with too many blank identifiers; default is 2
+    max-blank-identifiers: 2
+
+  whitespace:
+    multi-if: false   # Enforces newlines (or comments) after every multi-line if statement
+    multi-func: false # Enforces newlines (or comments) after every multi-line function signature
+  wsl:
+    # If true append is only allowed to be cuddled if appending value is
+    # matching variables, fields or types on line above. Default is true.
+    strict-append: true
+    # Allow calls and assignments to be cuddled as long as the lines have any
+    # matching variables, fields or types. Default is true.
+    allow-assign-and-call: true
+    # Allow multiline assignments to be cuddled. Default is true.
+    allow-multiline-assign: true
+    # Allow declarations (var) to be cuddled.
+    allow-cuddle-declarations: false
+    # Allow trailing comments in ending of blocks
+    allow-trailing-comment: false
+    # Force newlines in end of case at this limit (0 = never).
+    force-case-trailing-whitespace: 0
+  revive:
+    ignore-generated-header: true
+    severity: warning
+  funlen:
+    # Checks the number of lines in a function.
+    # If lower than 0, disable the check.
+    # Default: 60
+    lines: 280
+    # Checks the number of statements in a function.
+    # If lower than 0, disable the check.
+    # Default: 40
+    statements: 140
+
+linters:
+  # please, do not use `enable-all`: it's deprecated and will be removed soon.
+  # inverted configuration with `enable-all` and `disable` is not scalable during updates of golangci-lint
+  disable-all: true
+  enable:
+    - bodyclose
+    - depguard
+    - usestdlibvars
+    - reassign
+    - errcheck
+    - funlen
+    - gocognit
+    - goconst
+    - gofmt
+    - goimports
+    - revive
+    - gosimple
+    - govet
+    - ineffassign
+    - misspell
+    - nakedret
+    - exportloopref
+    - staticcheck
+    - typecheck
+    - unconvert
+    - unparam
+    - unused
+    - whitespace
+    - gci
+    # - gocritic
+    # - godox
+    # - gosec
+    # - interfacer
+    # - stylecheck
+    # - dogsled
+    # - dupl
+  # don't enable:
+  # - deadcode
+  # - gochecknoglobals
+  # - gochecknoinits
+  # - gocyclo
+  # - lll
+  # - maligned
+  # - prealloc
+  # - varcheck
+
+issues:
+  # List of regexps of issue texts to exclude, empty list by default.
+  # But independently from this option we use default exclude patterns,
+  # it can be disabled by `exclude-use-default: false`. To list all
+  # excluded by default patterns execute `golangci-lint run --help`
+  # exclude:
+  #   - abcdef
+
+  # Excluding configuration per-path, per-linter, per-text and per-source
+  exclude-rules:
+    # Exclude some linters from running on tests files.
+    - path: _test\.go
+      linters:
+        - gocyclo
+        - errcheck
+        - dupl
+        - gosec
+        - funlen
+
+    # Exclude known linters from partially hard-vendored code,
+    # which is impossible to exclude via "nolint" comments.
+    # - path: internal/hmac/
+    #   text: "weak cryptographic primitive"
+    #   linters:
+    #     - gosec
+
+    # Exclude some staticcheck messages
+    # - linters:
+    #     - staticcheck
+    #   text: "SA9003:"
+
+    # Exclude lll issues for long lines with go:generate
+    - linters:
+        - lll
+      source: "^//go:generate "
+
+  # Independently from option `exclude` we use default exclude patterns,
+  # it can be disabled by this option. To list all
+  # excluded by default patterns execute `golangci-lint run --help`.
+  # Default value for this option is true.
+  exclude-use-default: false
+
+  # Maximum issues count per one linter. Set to 0 to disable. Default is 50.
+  max-issues-per-linter: 0
+
+  # Maximum count of issues with the same text. Set to 0 to disable. Default is 3.
+  max-same-issues: 0
+
+  # Show only new issues: if there are unstaged changes or untracked files,
+  # only those changes are analyzed, else only changes in HEAD~ are analyzed.
+  # It's a super-useful option for integration of golangci-lint into existing
+  # large codebase. It's not practical to fix all existing issues at the moment
+  # of integration: much better don't allow issues in new code.
+  # Default is false.
+  new: false
+
+  # Show only new issues created after git revision `REV`
+  # This should be passed as flag during individual CI jobs.
+  # new-from-rev: REV
+
+  # Show only new issues created in git patch with set file path.
+  # new-from-patch: path/to/patch/file
\ No newline at end of file
diff --git a/cmd/helm3.go b/cmd/helm3.go
index a608cbcd..3068b57c 100644
--- a/cmd/helm3.go
+++ b/cmd/helm3.go
@@ -40,7 +40,6 @@ func compatibleHelm3Version() error {
 		return fmt.Errorf("helm diff upgrade requires at least helm version %s", minHelmVersion.String())
 	}
 	return nil
-
 }
 func getRelease(release, namespace string) ([]byte, error) {
 	args := []string{"get", "manifest", release}
@@ -117,7 +116,9 @@ func (d *diffCmd) template(isUpgrade bool) ([]byte, error) {
 		if err != nil {
 			return nil, err
 		}
-		defer os.Remove(tmpfile.Name())
+		defer func() {
+			_ = os.Remove(tmpfile.Name())
+		}()
 		if err := d.writeExistingValues(tmpfile); err != nil {
 			return nil, err
 		}
@@ -140,10 +141,12 @@ func (d *diffCmd) template(isUpgrade bool) ([]byte, error) {
 			if err != nil {
 				return nil, err
 			}
-			defer os.Remove(tmpfile.Name())
+			defer func() {
+				_ = os.Remove(tmpfile.Name())
+			}()
 
 			if _, err := tmpfile.Write(bytes); err != nil {
-				tmpfile.Close()
+				_ = tmpfile.Close()
 				return nil, err
 			}
 
@@ -220,7 +223,9 @@ func (d *diffCmd) template(isUpgrade bool) ([]byte, error) {
 func (d *diffCmd) writeExistingValues(f *os.File) error {
 	cmd := exec.Command(os.Getenv("HELM_BIN"), "get", "values", d.release, "--all", "--output", "yaml")
 	debugPrint("Executing %s", strings.Join(cmd.Args, " "))
-	defer f.Close()
+	defer func() {
+		_ = f.Close()
+	}()
 	cmd.Stdout = f
 	return cmd.Run()
 }
diff --git a/cmd/options.go b/cmd/options.go
index 1c97c4b6..50846887 100644
--- a/cmd/options.go
+++ b/cmd/options.go
@@ -1,8 +1,9 @@
 package cmd
 
 import (
-	"github.com/databus23/helm-diff/v3/diff"
 	"github.com/spf13/pflag"
+
+	"github.com/databus23/helm-diff/v3/diff"
 )
 
 // AddDiffOptions adds flags for the various consolidated options to the functions in the diff package
diff --git a/cmd/root.go b/cmd/root.go
index 231512a9..565436c6 100644
--- a/cmd/root.go
+++ b/cmd/root.go
@@ -32,7 +32,6 @@ The Helm Diff Plugin
 
 // New creates a new cobra client
 func New() *cobra.Command {
-
 	chartCommand := newChartCommand()
 
 	cmd := &cobra.Command{
diff --git a/cmd/upgrade.go b/cmd/upgrade.go
index c37f78cd..44b5a328 100644
--- a/cmd/upgrade.go
+++ b/cmd/upgrade.go
@@ -9,12 +9,12 @@ import (
 	"strconv"
 	"strings"
 
+	jsonpatch "github.com/evanphx/json-patch"
 	jsoniterator "github.com/json-iterator/go"
+	"github.com/pkg/errors"
+	"github.com/spf13/cobra"
 	"helm.sh/helm/v3/pkg/action"
 	"helm.sh/helm/v3/pkg/cli"
-
-	jsonpatch "github.com/evanphx/json-patch"
-	"github.com/pkg/errors"
 	"helm.sh/helm/v3/pkg/kube"
 	apiextv1 "k8s.io/apiextensions-apiserver/pkg/apis/apiextensions/v1"
 	apierrors "k8s.io/apimachinery/pkg/api/errors"
@@ -24,8 +24,6 @@ import (
 	"k8s.io/cli-runtime/pkg/resource"
 	"sigs.k8s.io/yaml"
 
-	"github.com/spf13/cobra"
-
 	"github.com/databus23/helm-diff/v3/diff"
 	"github.com/databus23/helm-diff/v3/manifest"
 )
@@ -204,11 +202,9 @@ func newChartCommand() *cobra.Command {
 	AddDiffOptions(f, &diff.Options)
 
 	return cmd
-
 }
 
 func (d *diffCmd) runHelm3() error {
-
 	if err := compatibleHelm3Version(); err != nil {
 		return err
 	}
diff --git a/diff/diff.go b/diff/diff.go
index cda0f9b3..28d861dd 100644
--- a/diff/diff.go
+++ b/diff/diff.go
@@ -234,7 +234,6 @@ func getComment(s string) string {
 		return ""
 	}
 	return s[:i+1]
-
 }
 
 // Releases reindex the content  based on the template names and pass it to Manifests
@@ -267,7 +266,6 @@ func split(value string, stripTrailingCR bool) []string {
 
 func printDiffRecords(suppressedKinds []string, kind string, context int, diffs []difflib.DiffRecord, to io.Writer) {
 	for _, ckind := range suppressedKinds {
-
 		if ckind == kind {
 			str := fmt.Sprintf("+ Changes suppressed on sensitive content of type %s\n", kind)
 			fmt.Fprint(to, ansi.Color(str, "yellow"))
@@ -350,7 +348,6 @@ func calculateDistances(diffs []difflib.DiffRecord) map[int]int {
 
 // reIndexForRelease based on template names
 func reIndexForRelease(index map[string]*manifest.MappingResult) map[string]*manifest.MappingResult {
-
 	// sort the index to iterate map in the same order
 	var keys []string
 	for key := range index {
@@ -364,7 +361,6 @@ func reIndexForRelease(index map[string]*manifest.MappingResult) map[string]*man
 	newIndex := make(map[string]*manifest.MappingResult)
 
 	for key := range keys {
-
 		str := strings.Replace(strings.Split(index[keys[key]].Content, "\n")[0], "# Source: ", "", 1)
 
 		if _, ok := newIndex[str]; ok {
diff --git a/diff/diff_test.go b/diff/diff_test.go
index 8df93823..0474e9aa 100644
--- a/diff/diff_test.go
+++ b/diff/diff_test.go
@@ -48,7 +48,6 @@ var text3 = "" +
 	"line10"
 
 func TestPrintDiffWithContext(t *testing.T) {
-
 	t.Run("context-disabled", func(t *testing.T) {
 		assertDiff(t, text1, text2, -1, false, ""+
 			"- line1\n"+
@@ -154,7 +153,6 @@ func TestPrintDiffWithContext(t *testing.T) {
 			"  line9\n"+
 			"  line10\n")
 	})
-
 }
 
 func assertDiff(t *testing.T, before, after string, context int, stripTrailingCR bool, expected string) {
diff --git a/diff/report.go b/diff/report.go
index 2e624f21..48f1fa94 100644
--- a/diff/report.go
+++ b/diff/report.go
@@ -3,8 +3,6 @@ package diff
 import (
 	"errors"
 	"fmt"
-	"github.com/gonvenience/ytbx"
-	"github.com/homeport/dyff/pkg/dyff"
 	"io"
 	"log"
 	"os"
@@ -14,6 +12,8 @@ import (
 	"text/template"
 
 	"github.com/aryann/difflib"
+	"github.com/gonvenience/ytbx"
+	"github.com/homeport/dyff/pkg/dyff"
 	"github.com/mgutz/ansi"
 )
 
@@ -76,9 +76,13 @@ func setupDyffReport(r *Report) {
 
 func printDyffReport(r *Report, to io.Writer) {
 	currentFile, _ := os.CreateTemp("", "existing-values")
-	defer os.Remove(currentFile.Name())
+	defer func() {
+		_ = os.Remove(currentFile.Name())
+	}()
 	newFile, _ := os.CreateTemp("", "new-values")
-	defer os.Remove(newFile.Name())
+	defer func() {
+		_ = os.Remove(newFile.Name())
+	}()
 
 	for _, entry := range r.entries {
 		_, _ = currentFile.WriteString("---\n")
@@ -147,7 +151,6 @@ func printDiffReport(r *Report, to io.Writer) {
 		fmt.Fprintf(to, ansi.Color("%s %s", "yellow")+"\n", entry.key, r.format.changestyles[entry.changeType].message)
 		printDiffRecords(entry.suppressedKinds, entry.kind, entry.context, entry.diffs, to)
 	}
-
 }
 
 // setup report for simple output.
@@ -262,7 +265,7 @@ func templateReportPrinter(t *template.Template) func(r *Report, to io.Writer) {
 			}
 		}
 
-		t.Execute(to, templateDataArray)
+		_ = t.Execute(to, templateDataArray)
 		_, _ = to.Write([]byte("\n"))
 	}
 }
diff --git a/main.go b/main.go
index 4d813ef3..e3393999 100644
--- a/main.go
+++ b/main.go
@@ -3,11 +3,12 @@ package main
 import (
 	"os"
 
-	"github.com/databus23/helm-diff/v3/cmd"
 	_ "k8s.io/client-go/plugin/pkg/client/auth/azure"
 	_ "k8s.io/client-go/plugin/pkg/client/auth/exec"
 	_ "k8s.io/client-go/plugin/pkg/client/auth/gcp"
 	_ "k8s.io/client-go/plugin/pkg/client/auth/oidc"
+
+	"github.com/databus23/helm-diff/v3/cmd"
 )
 
 func main() {
diff --git a/manifest/parse_test.go b/manifest/parse_test.go
index c5a7e319..1ae65f28 100644
--- a/manifest/parse_test.go
+++ b/manifest/parse_test.go
@@ -1,7 +1,7 @@
 package manifest_test
 
 import (
-	"io/ioutil"
+	"os"
 	"sort"
 	"testing"
 
@@ -20,7 +20,7 @@ func foundObjects(result map[string]*MappingResult) []string {
 }
 
 func TestPod(t *testing.T) {
-	spec, err := ioutil.ReadFile("testdata/pod.yaml")
+	spec, err := os.ReadFile("testdata/pod.yaml")
 	require.NoError(t, err)
 
 	require.Equal(t,
@@ -30,7 +30,7 @@ func TestPod(t *testing.T) {
 }
 
 func TestPodNamespace(t *testing.T) {
-	spec, err := ioutil.ReadFile("testdata/pod_namespace.yaml")
+	spec, err := os.ReadFile("testdata/pod_namespace.yaml")
 	require.NoError(t, err)
 
 	require.Equal(t,
@@ -40,7 +40,7 @@ func TestPodNamespace(t *testing.T) {
 }
 
 func TestPodHook(t *testing.T) {
-	spec, err := ioutil.ReadFile("testdata/pod_hook.yaml")
+	spec, err := os.ReadFile("testdata/pod_hook.yaml")
 	require.NoError(t, err)
 
 	require.Equal(t,
@@ -60,7 +60,7 @@ func TestPodHook(t *testing.T) {
 }
 
 func TestDeployV1(t *testing.T) {
-	spec, err := ioutil.ReadFile("testdata/deploy_v1.yaml")
+	spec, err := os.ReadFile("testdata/deploy_v1.yaml")
 	require.NoError(t, err)
 
 	require.Equal(t,
@@ -70,7 +70,7 @@ func TestDeployV1(t *testing.T) {
 }
 
 func TestDeployV1Beta1(t *testing.T) {
-	spec, err := ioutil.ReadFile("testdata/deploy_v1beta1.yaml")
+	spec, err := os.ReadFile("testdata/deploy_v1beta1.yaml")
 	require.NoError(t, err)
 
 	require.Equal(t,
@@ -80,7 +80,7 @@ func TestDeployV1Beta1(t *testing.T) {
 }
 
 func TestList(t *testing.T) {
-	spec, err := ioutil.ReadFile("testdata/list.yaml")
+	spec, err := os.ReadFile("testdata/list.yaml")
 	require.NoError(t, err)
 
 	require.Equal(t,
@@ -93,7 +93,7 @@ func TestList(t *testing.T) {
 }
 
 func TestEmpty(t *testing.T) {
-	spec, err := ioutil.ReadFile("testdata/empty.yaml")
+	spec, err := os.ReadFile("testdata/empty.yaml")
 	require.NoError(t, err)
 
 	require.Equal(t,
@@ -103,7 +103,7 @@ func TestEmpty(t *testing.T) {
 }
 
 func TestBaseNameAnnotation(t *testing.T) {
-	spec, err := ioutil.ReadFile("testdata/secret_immutable.yaml")
+	spec, err := os.ReadFile("testdata/secret_immutable.yaml")
 	require.NoError(t, err)
 
 	require.Equal(t,