diff --git a/CODEOWNERS b/CODEOWNERS
new file mode 100644
index 0000000..00ed351
--- /dev/null
+++ b/CODEOWNERS
@@ -0,0 +1,2 @@
+* @astronomer/astronomer-software
+* @astronomer/maintainers-astronomer
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..b655b3d
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,95 @@
+# Variables
+TAG := v1.1.0
+LDFLAGS := -X main.buildVersion=$(TAG)
+GO111MODULE := on
+GO_VERSION := 1.22
+BINARY_NAME := minica
+
+# Default target
+.DEFAULT_GOAL := help
+
+# Silent mode
+.SILENT:
+
+# Phony targets
+.PHONY: all help deps build clean test fmt lint dist dist-clean release check-go-version
+
+# Help target
+help:
+	@echo "Available targets:"
+	@echo "  all            - Build the binary (default)"
+	@echo "  help           - Show this help message"
+	@echo "  deps           - Download dependencies"
+	@echo "  build          - Build the binary"
+	@echo "  clean          - Remove build artifacts"
+	@echo "  fmt            - Format code"
+	@echo "  lint           - Run linters"
+	@echo "  dist           - Build binaries for all platforms"
+	@echo "  release        - Create release tarballs"
+
+# Check Go version
+check-go-version:
+	@go version | grep -q "go$(GO_VERSION)" || (echo "Go $(GO_VERSION) is required" && exit 1)
+
+# Dependencies
+deps: check-go-version
+	go mod tidy
+
+# Build
+build: check-go-version deps
+	echo "Building $(BINARY_NAME)"
+	go build -ldflags "$(LDFLAGS)" -o $(BINARY_NAME)
+
+# Install
+install: check-go-version deps
+	echo "Installing $(BINARY_NAME)"
+	go install -ldflags "$(LDFLAGS)"
+
+# Clean
+clean:
+	rm -f $(BINARY_NAME)
+	rm -rf dist
+	rm -f minica-*.tar.gz
+
+# Format
+fmt: check-go-version
+	go fmt ./...
+
+# Lint
+lint: check-go-version deps
+	go vet ./...
+
+# Distribution
+dist-clean:
+	rm -rf dist
+	rm -f minica-*.tar.gz
+
+dist: check-go-version deps dist-clean
+	mkdir -p dist/alpine-linux/amd64 && GOOS=linux GOARCH=amd64 go build -ldflags "$(LDFLAGS)" -a -tags netgo -installsuffix netgo -o dist/alpine-linux/amd64/minica
+	mkdir -p dist/alpine-linux/ppc64le && GOOS=linux GOARCH=ppc64le go build -ldflags "$(LDFLAGS)" -a -tags netgo -installsuffix netgo -o dist/alpine-linux/ppc64le/minica
+	mkdir -p dist/linux/amd64 && GOOS=linux GOARCH=amd64 go build -ldflags "$(LDFLAGS)" -o dist/linux/amd64/minica
+	mkdir -p dist/linux/386 && GOOS=linux GOARCH=386 go build -ldflags "$(LDFLAGS)" -o dist/linux/386/minica
+	mkdir -p dist/linux/armel && GOOS=linux GOARCH=arm GOARM=5 go build -ldflags "$(LDFLAGS)" -o dist/linux/armel/minica
+	mkdir -p dist/linux/armhf && GOOS=linux GOARCH=arm GOARM=6 go build -ldflags "$(LDFLAGS)" -o dist/linux/armhf/minica
+	mkdir -p dist/linux/arm64 && GOOS=linux GOARCH=arm64 go build -ldflags "$(LDFLAGS)" -o dist/linux/arm64/minica
+	mkdir -p dist/linux/ppc64le && GOOS=linux GOARCH=ppc64le go build -ldflags "$(LDFLAGS)" -o dist/linux/ppc64le/minica
+	mkdir -p dist/darwin/amd64 && GOOS=darwin GOARCH=amd64 go build -ldflags "$(LDFLAGS)" -o dist/darwin/amd64/minica
+	mkdir -p dist/darwin/arm64 && GOOS=darwin GOARCH=arm64 go build -ldflags "$(LDFLAGS)" -o dist/darwin/arm64/minica
+	mkdir -p dist/linux/s390x && GOOS=linux GOARCH=s390x go build -ldflags "$(LDFLAGS)" -o dist/linux/s390x/minica
+
+# Release
+release: dist
+	tar -cvzf minica-alpine-linux-amd64-$(TAG).tar.gz -C dist/alpine-linux/amd64 minica
+	tar -cvzf minica-alpine-linux-ppc64le-$(TAG).tar.gz -C dist/alpine-linux/ppc64le minica
+	tar -cvzf minica-linux-amd64-$(TAG).tar.gz -C dist/linux/amd64 minica
+	tar -cvzf minica-linux-386-$(TAG).tar.gz -C dist/linux/386 minica
+	tar -cvzf minica-linux-armel-$(TAG).tar.gz -C dist/linux/armel minica
+	tar -cvzf minica-linux-armhf-$(TAG).tar.gz -C dist/linux/armhf minica
+	tar -cvzf minica-linux-arm64-$(TAG).tar.gz -C dist/linux/arm64 minica
+	tar -cvzf minica-linux-ppc64le-$(TAG).tar.gz -C dist/linux/ppc64le minica
+	tar -cvzf minica-darwin-amd64-$(TAG).tar.gz -C dist/darwin/amd64 minica
+	tar -cvzf minica-darwin-arm64-$(TAG).tar.gz -C dist/darwin/arm64 minica
+	tar -cvzf minica-linux-s390x-$(TAG).tar.gz -C dist/linux/s390x minica
+
+# Alias for build
+all: build
\ No newline at end of file
diff --git a/go.mod b/go.mod
index d20f8af..2c926f9 100644
--- a/go.mod
+++ b/go.mod
@@ -1,3 +1,3 @@
 module github.com/jsha/minica
 
-go 1.15
+go 1.22
diff --git a/main.go b/main.go
index 591bf4f..537d2d4 100644
--- a/main.go
+++ b/main.go
@@ -15,7 +15,6 @@ import (
 	"encoding/pem"
 	"flag"
 	"fmt"
-	"io/ioutil"
 	"log"
 	"math"
 	"math/big"
@@ -39,8 +38,8 @@ type issuer struct {
 }
 
 func getIssuer(keyFile, certFile string, alg x509.PublicKeyAlgorithm) (*issuer, error) {
-	keyContents, keyErr := ioutil.ReadFile(keyFile)
-	certContents, certErr := ioutil.ReadFile(certFile)
+	keyContents, keyErr := os.ReadFile(keyFile)
+	certContents, certErr := os.ReadFile(certFile)
 	if os.IsNotExist(keyErr) && os.IsNotExist(certErr) {
 		err := makeIssuer(keyFile, certFile, alg)
 		if err != nil {