diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
new file mode 100644
index 0000000000000000000000000000000000000000..c6fc6f2c364e9e4d176656a73d594d85cb06af80
--- /dev/null
+++ b/.github/workflows/codeql-analysis.yml
@@ -0,0 +1,72 @@
+# For most projects, this workflow file will not need changing; you simply need
+# to commit it to your repository.
+#
+# You may wish to alter this file to override the set of languages analyzed,
+# or to provide custom queries or build logic.
+#
+# ******** NOTE ********
+# We have attempted to detect the languages in your repository. Please check
+# the `language` matrix defined below to confirm you have the correct set of
+# supported CodeQL languages.
+#
+name: "CodeQL"
+
+on:
+  push:
+    branches: [ "master" ]
+  pull_request:
+    # The branches below must be a subset of the branches above
+    branches: [ "master" ]
+  schedule:
+    - cron: '30 3 * * 3'
+
+jobs:
+  analyze:
+    name: Analyze
+    runs-on: ubuntu-latest
+    permissions:
+      actions: read
+      contents: read
+      security-events: write
+
+    strategy:
+      fail-fast: false
+      matrix:
+        language: [ 'go' ]
+        # CodeQL supports [ 'cpp', 'csharp', 'go', 'java', 'javascript', 'python', 'ruby' ]
+        # Learn more about CodeQL language support at https://aka.ms/codeql-docs/language-support
+
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v3
+
+    # Initializes the CodeQL tools for scanning.
+    - name: Initialize CodeQL
+      uses: github/codeql-action/init@v2
+      with:
+        languages: ${{ matrix.language }}
+        # If you wish to specify custom queries, you can do so here or in a config file.
+        # By default, queries listed here will override any specified in a config file.
+        # Prefix the list here with "+" to use these queries and those in the config file.
+
+        # Details on CodeQL's query packs refer to : https://docs.github.com/en/code-security/code-scanning/automatically-scanning-your-code-for-vulnerabilities-and-errors/configuring-code-scanning#using-queries-in-ql-packs
+        # queries: security-extended,security-and-quality
+
+
+    # Autobuild attempts to build any compiled languages  (C/C++, C#, or Java).
+    # If this step fails, then you should remove it and run the build manually (see below)
+    - name: Autobuild
+      uses: github/codeql-action/autobuild@v2
+
+    # ℹ️ Command-line programs to run using the OS shell.
+    # 📚 See https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#jobsjob_idstepsrun
+
+    #   If the Autobuild fails above, remove it and uncomment the following three lines.
+    #   modify them (or add more) to build your code if your project, please refer to the EXAMPLE below for guidance.
+
+    # - run: |
+    #   echo "Run, Build Application using script"
+    #   ./location_of_script_within_repo/buildscript.sh
+
+    - name: Perform CodeQL Analysis
+      uses: github/codeql-action/analyze@v2
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
new file mode 100644
index 0000000000000000000000000000000000000000..d84c028ea42a70851f803017dc4d19a91bf1c8ec
--- /dev/null
+++ b/.github/workflows/test.yml
@@ -0,0 +1,15 @@
+name: Continuous Integration
+
+on:
+  push:
+    tags-ignore:
+    - 'v*'
+    branches:
+    - "**"
+  pull_request:
+  schedule:
+    - cron: '0 0 * * SUN'
+
+jobs:
+  ci:
+    uses: smallstep/workflows/.github/workflows/goCI.yml@main
diff --git a/Makefile b/Makefile
index cb7f82adadb8bc13610b8e304196441f8b5c2fd8..ce711408c5942ea9f73de996d56126d147297e98 100644
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,62 @@
-all:
-	go build -o bin/truststore cmd/truststore/main.go
+# Set V to 1 for verbose output from the Makefile
+Q=$(if $V,,@)
+SRC=$(shell find . -type f -name '*.go')
+
+all: lint test build
+
+ci: test
+
+.PHONY: all ci
+
+#########################################
+# Build
+#########################################
+
+build:
+	$Q go build -o bin/truststore cmd/truststore/main.go
+
+.PHONY: build
+
+#########################################
+# Bootstrapping
+#########################################
+
+bootstra%:
+	$Q curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b $$(go env GOPATH)/bin v1.49.0
+	$Q go install golang.org/x/vuln/cmd/govulncheck@latest
+	$Q go install gotest.tools/gotestsum@v1.8.1
+
+.PHONY: bootstrap
+
+#########################################
+# Test
+#########################################
+
+test:
+	$Q $(GOFLAGS) gotestsum -- -coverpkg=./... -coverprofile=coverage.out -covermode=atomic ./...
+
+race:
+	$Q $(GOFLAGS) gotestsum -- -race ./...
+
+.PHONY: test race
+
+#########################################
+# Linting
+#########################################
+
+fmt:
+	$Q goimports -local github.com/golangci/golangci-lint -l -w $(SRC)
+
+lint: SHELL:=/bin/bash
+lint:
+	$Q LOG_LEVEL=error golangci-lint run --config <(curl -s https://raw.githubusercontent.com/smallstep/workflows/master/.golangci.yml) --timeout=30m
+	$Q govulncheck ./...
+
+.PHONY: fmt lint
+
+#########################################
+# Clean
+#########################################
 
 clean:
 	rm -rf bin
diff --git a/errors.go b/errors.go
index 13741bae82279ae3361a8f3a956d8bd40e688801..15b97370e83c85ac8df1163f6b23204b096b77c0 100644
--- a/errors.go
+++ b/errors.go
@@ -72,5 +72,5 @@ func wrapError(err error, msg string) error {
 	if err == nil {
 		return nil
 	}
-	return fmt.Errorf("%s: %s", msg, err)
+	return fmt.Errorf("%s: %w", msg, err)
 }
diff --git a/go.mod b/go.mod
index 4b56c6c3c134033cedf79b945b95d1050735115b..c92bcbeef8c38e4cbedac223012bb16fa2396988 100644
--- a/go.mod
+++ b/go.mod
@@ -1,5 +1,5 @@
 module github.com/smallstep/truststore
 
-go 1.13
+go 1.18
 
 require howett.net/plist v0.0.0-20181124034731-591f970eefbb
diff --git a/truststore.go b/truststore.go
index 714af038c0b39b9f3c65ff0324c011b1a7ca9d74..82571a3f488e72081a4c4fb072029e4e6da4254e 100644
--- a/truststore.go
+++ b/truststore.go
@@ -7,7 +7,6 @@ import (
 	"crypto/x509"
 	"encoding/pem"
 	"io"
-	"io/ioutil"
 	"log"
 	"os"
 )
@@ -118,14 +117,14 @@ func uninstallCertificate(filename string, cert *x509.Certificate, opts []Option
 
 // ReadCertificate reads a certificate file and returns a x509.Certificate struct.
 func ReadCertificate(filename string) (*x509.Certificate, error) {
-	b, err := ioutil.ReadFile(filename)
+	b, err := os.ReadFile(filename)
 	if err != nil {
 		return nil, err
 	}
 
 	// PEM format
 	if bytes.HasPrefix(b, []byte("-----BEGIN ")) {
-		b, err = ioutil.ReadFile(filename)
+		b, err = os.ReadFile(filename)
 		if err != nil {
 			return nil, err
 		}
@@ -148,7 +147,7 @@ func SaveCertificate(filename string, cert *x509.Certificate) error {
 		Type:  "CERTIFICATE",
 		Bytes: cert.Raw,
 	}
-	return ioutil.WriteFile(filename, pem.EncodeToMemory(block), 0600)
+	return os.WriteFile(filename, pem.EncodeToMemory(block), 0600)
 }
 
 type options struct {
@@ -225,7 +224,7 @@ func uniqueName(cert *x509.Certificate) string {
 }
 
 func saveTempCert(cert *x509.Certificate) (string, func(), error) {
-	f, err := ioutil.TempFile(os.TempDir(), "truststore.*.pem")
+	f, err := os.CreateTemp(os.TempDir(), "truststore.*.pem")
 	if err != nil {
 		return "", func() {}, err
 	}
diff --git a/truststore_darwin.go b/truststore_darwin.go
index bdc1f6c29b1ec7146a08a651f5163fd50f7e2bf7..9f25654585d37e0f9434a9fc3f1fe666cf1d74bb 100644
--- a/truststore_darwin.go
+++ b/truststore_darwin.go
@@ -8,7 +8,6 @@ import (
 	"crypto/x509"
 	"encoding/asn1"
 	"fmt"
-	"io/ioutil"
 	"os"
 	"os/exec"
 
@@ -60,19 +59,20 @@ func installPlatform(filename string, cert *x509.Certificate) error {
 
 	// Make trustSettings explicit, as older Go does not know the defaults.
 	// https://github.com/golang/go/issues/24652
-	plistFile, err := ioutil.TempFile("", "trust-settings")
+	plistFile, err := os.CreateTemp("", "trust-settings")
 	if err != nil {
 		return wrapError(err, "failed to create temp file")
 	}
 	defer os.Remove(plistFile.Name())
 
+	//nolint:gosec // tolerable risk necessary for function
 	cmd = exec.Command("sudo", "security", "trust-settings-export", "-d", plistFile.Name())
 	out, err = cmd.CombinedOutput()
 	if err != nil {
 		return NewCmdError(err, cmd, out)
 	}
 
-	plistData, err := ioutil.ReadFile(plistFile.Name())
+	plistData, err := os.ReadFile(plistFile.Name())
 	if err != nil {
 		return wrapError(err, "failed to read trust settings")
 	}
@@ -106,11 +106,12 @@ func installPlatform(filename string, cert *x509.Certificate) error {
 		return wrapError(err, "failed to serialize trust settings")
 	}
 
-	err = ioutil.WriteFile(plistFile.Name(), plistData, 0600)
+	err = os.WriteFile(plistFile.Name(), plistData, 0600)
 	if err != nil {
 		return wrapError(err, "failed to write trust settings")
 	}
 
+	//nolint:gosec // tolerable risk necessary for function
 	cmd = exec.Command("sudo", "security", "trust-settings-import", "-d", plistFile.Name())
 	out, err = cmd.CombinedOutput()
 	if err != nil {
diff --git a/truststore_java.go b/truststore_java.go
index d7bbea6f7ae3755b040f05c5eff26414f3103d42..7051a43d7803bdfcb2353626534a36d68d42dc8f 100644
--- a/truststore_java.go
+++ b/truststore_java.go
@@ -5,7 +5,7 @@ package truststore
 
 import (
 	"bytes"
-	"crypto/sha1"
+	"crypto/sha1" //nolint:gosec // not used for cryptographic purposes
 	"crypto/sha256"
 	"crypto/x509"
 	"encoding/hex"
@@ -76,6 +76,7 @@ func (t *JavaTrust) Install(filename string, cert *x509.Certificate) error {
 		"-alias", uniqueName(cert),
 	}
 
+	//nolint:gosec // tolerable risk necessary for function
 	cmd := exec.Command(t.keytoolPath, args...)
 	if out, err := execKeytool(cmd); err != nil {
 		return NewCmdError(err, cmd, out)
@@ -94,6 +95,7 @@ func (t *JavaTrust) Uninstall(filename string, cert *x509.Certificate) error {
 		"-storepass", JavaStorePass,
 	}
 
+	//nolint:gosec // tolerable risk necessary for function
 	cmd := exec.Command(t.keytoolPath, args...)
 	out, err := execKeytool(cmd)
 	if bytes.Contains(out, []byte("does not exist")) {
@@ -121,6 +123,7 @@ func (t *JavaTrust) Exists(cert *x509.Certificate) bool {
 		return bytes.Contains(keytoolOutput, []byte(fp))
 	}
 
+	//nolint:gosec // tolerable risk necessary for function
 	cmd := exec.Command(t.keytoolPath, "-list", "-keystore", t.cacertsPath, "-storepass", JavaStorePass)
 	keytoolOutput, err := cmd.CombinedOutput()
 	if err != nil {
@@ -130,9 +133,10 @@ func (t *JavaTrust) Exists(cert *x509.Certificate) bool {
 
 	// keytool outputs SHA1 and SHA256 (Java 9+) certificates in uppercase hex
 	// with each octet pair delimitated by ":". Drop them from the keytool output
-	keytoolOutput = bytes.Replace(keytoolOutput, []byte(":"), nil, -1)
+	keytoolOutput = bytes.ReplaceAll(keytoolOutput, []byte(":"), nil)
 
 	// pre-Java 9 uses SHA1 fingerprints
+	//nolint:gosec // not used for cryptographic purposes
 	s1, s256 := sha1.New(), sha256.New()
 	return exists(cert, s1, keytoolOutput) || exists(cert, s256, keytoolOutput)
 }
@@ -151,6 +155,7 @@ func execKeytool(cmd *exec.Cmd) ([]byte, error) {
 	out, err := cmd.CombinedOutput()
 	if err != nil && bytes.Contains(out, []byte("java.io.FileNotFoundException")) && runtime.GOOS != "windows" {
 		origArgs := cmd.Args[1:]
+		//nolint:gosec // tolerable risk necessary for function
 		cmd = exec.Command("sudo", cmd.Path)
 		cmd.Args = append(cmd.Args, origArgs...)
 		cmd.Env = []string{
diff --git a/truststore_linux.go b/truststore_linux.go
index 92bbfba44ecff8b5de9e5a72bffe5c4d29fac06b..d01d73e285e031d52dc903e96291455b04425f7b 100644
--- a/truststore_linux.go
+++ b/truststore_linux.go
@@ -7,7 +7,6 @@ import (
 	"bytes"
 	"crypto/x509"
 	"fmt"
-	"io/ioutil"
 	"os"
 	"os/exec"
 	"strings"
@@ -28,19 +27,20 @@ var (
 )
 
 func init() {
-	if pathExists("/etc/pki/ca-trust/source/anchors/") {
+	switch {
+	case pathExists("/etc/pki/ca-trust/source/anchors/"):
 		SystemTrustFilename = "/etc/pki/ca-trust/source/anchors/%s.pem"
 		SystemTrustCommand = []string{"update-ca-trust", "extract"}
-	} else if pathExists("/usr/local/share/ca-certificates/") {
+	case pathExists("/usr/local/share/ca-certificates/"):
 		SystemTrustFilename = "/usr/local/share/ca-certificates/%s.crt"
 		SystemTrustCommand = []string{"update-ca-certificates"}
-	} else if pathExists("/usr/shared/pki/trust/anchors/") {
+	case pathExists("/usr/shared/pki/trust/anchors/"):
 		SystemTrustFilename = "/usr/shared/pki/trust/anchors/%s.crt"
 		SystemTrustCommand = []string{"update-ca-certificates"}
-	} else if pathExists("/etc/ca-certificates/trust-source/anchors/") {
+	case pathExists("/etc/ca-certificates/trust-source/anchors/"):
 		SystemTrustFilename = "/etc/ca-certificates/trust-source/anchors/%s.crt"
 		SystemTrustCommand = []string{"trust", "extract-compat"}
-	} else if pathExists("/etc/ssl/certs/") {
+	case pathExists("/etc/ssl/certs/"):
 		SystemTrustFilename = "/etc/ssl/certs/%s.crt"
 		SystemTrustCommand = []string{"trust", "extract-compat"}
 	}
@@ -58,7 +58,7 @@ func pathExists(path string) bool {
 }
 
 func systemTrustFilename(cert *x509.Certificate) string {
-	return fmt.Sprintf(SystemTrustFilename, strings.Replace(uniqueName(cert), " ", "_", -1))
+	return fmt.Sprintf(SystemTrustFilename, strings.ReplaceAll(uniqueName(cert), " ", "_"))
 }
 
 func installPlatform(filename string, cert *x509.Certificate) error {
@@ -66,7 +66,7 @@ func installPlatform(filename string, cert *x509.Certificate) error {
 		return ErrNotSupported
 	}
 
-	data, err := ioutil.ReadFile(filename)
+	data, err := os.ReadFile(filename)
 	if err != nil {
 		return err
 	}
@@ -111,7 +111,9 @@ func uninstallPlatform(filename string, cert *x509.Certificate) error {
 
 func CommandWithSudo(cmd ...string) *exec.Cmd {
 	if _, err := exec.LookPath("sudo"); err != nil {
+		//nolint:gosec // tolerable risk necessary for function
 		return exec.Command(cmd[0], cmd[1:]...)
 	}
+	//nolint:gosec // tolerable risk necessary for function
 	return exec.Command("sudo", append([]string{"--"}, cmd...)...)
 }
diff --git a/truststore_nss.go b/truststore_nss.go
index 9bdcbbc8c0986d374968066ad2b4cb160a917ad2..c3c3618be7f1898ef26c72f9f8c2961a8484c9ee 100644
--- a/truststore_nss.go
+++ b/truststore_nss.go
@@ -13,7 +13,7 @@ import (
 	"strings"
 )
 
-var nssDB = filepath.Join(os.Getenv("HOME"), ".pki/nssdb")
+var nssDB = filepath.Join(os.Getenv("HOME"), ".pki", "nssdb")
 
 // NSSTrust implements a Trust for Firefox or other NSS based applications.
 type NSSTrust struct {
@@ -60,6 +60,7 @@ func (t *NSSTrust) Name() string {
 func (t *NSSTrust) Install(filename string, cert *x509.Certificate) error {
 	// install certificate in all profiles
 	if forEachNSSProfile(func(profile string) {
+		//nolint:gosec // tolerable risk necessary for function
 		cmd := exec.Command(t.certutilPath, "-A", "-d", profile, "-t", "C,,", "-n", uniqueName(cert), "-i", filename)
 		out, err := cmd.CombinedOutput()
 		if err != nil {
@@ -85,10 +86,12 @@ func (t *NSSTrust) Uninstall(filename string, cert *x509.Certificate) (err error
 			return
 		}
 		// skip if not found
+		//nolint:gosec // tolerable risk necessary for function
 		if err := exec.Command(t.certutilPath, "-V", "-d", profile, "-u", "L", "-n", uniqueName(cert)).Run(); err != nil {
 			return
 		}
 		// delete certificate
+		//nolint:gosec // tolerable risk necessary for function
 		cmd := exec.Command(t.certutilPath, "-D", "-d", profile, "-n", uniqueName(cert))
 		out, err1 := cmd.CombinedOutput()
 		if err1 != nil {
@@ -106,6 +109,7 @@ func (t *NSSTrust) Uninstall(filename string, cert *x509.Certificate) (err error
 func (t *NSSTrust) Exists(cert *x509.Certificate) bool {
 	success := true
 	if forEachNSSProfile(func(profile string) {
+		//nolint:gosec // tolerable risk necessary for function
 		err := exec.Command(t.certutilPath, "-V", "-d", profile, "-u", "L", "-n", uniqueName(cert)).Run()
 		if err != nil {
 			success = false
@@ -126,10 +130,10 @@ func (t *NSSTrust) PreCheck() error {
 	}
 
 	if CertutilInstallHelp == "" {
-		return fmt.Errorf("Note: NSS support is not available on your platform")
+		return fmt.Errorf("note: NSS support is not available on your platform")
 	}
 
-	return fmt.Errorf(`Warning: "certutil" is not available, install "certutil" with "%s" and try again`, CertutilInstallHelp)
+	return fmt.Errorf(`warning: "certutil" is not available, install "certutil" with "%s" and try again`, CertutilInstallHelp)
 }
 
 func forEachNSSProfile(f func(profile string)) (found int) {