diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..f86576f
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,98 @@
+-include Makefile.local # for optional local options
+
+NAME = myip
+COMPILER ?= crystal
+SHARDS ?= shards
+
+ENTRY != cat shard.yml |grep main: |cut -d: -f2|cut -d" " -f2
+ENTRY_PATH := $(shell pwd)/$(shell cat shard.yml |grep main: |cut -d: -f2|cut -d" " -f2)
+
+CACHE_DIR != ${COMPILER} env CRYSTAL_CACHE_DIR
+CACHE_DIR := $(CACHE_DIR)/$(subst /,-,${shell echo ${ENTRY_PATH} |cut -c2-})
+
+FLAGS ?= --progress -Dstrict_multi_assign -Dno_number_autocast
+RELEASE_FLAGS ?= --progress --release -Dstrict_multi_assign -Dno_number_autocast
+
+# INSTALL:
+DESTDIR ?= /usr/local
+BINDIR ?= $(DESTDIR)/bin
+INSTALL ?= /usr/bin/install
+
+SRC_SOURCES != find src -name '*.cr'
+LIB_SOURCES != find lib -name '*.cr' 2>/dev/null
+SPEC_SOURCES != find spec -name '*.cr' 2>/dev/null
+
+O := bin/$(NAME)
+
+.PHONY: build
+build: ## Build the application binary.
+build: $(O)
+
+$(O): $(SRC_SOURCES) $(LIB_SOURCES) lib
+	mkdir -p $(shell dirname $@)
+	$(COMPILER) build $(FLAGS) $(ENTRY) -o $(O)
+
+.PHONY: release
+release: ## Build release binary.
+release: lib
+	$(COMPILER) build $(RELEASE_FLAGS) $(ENTRY) -o $(O)
+
+.PHONY: spec
+spec: ## Run spec suite.
+spec: lib
+	$(COMPILER) spec $(FLAGS) --order=random --error-on-warnings
+
+.PHONY: format
+format: ## Apply source code formatting
+format: $(SRC_SOURCES) $(SPEC_SOURCES)
+	$(CRYSTAL) tool format src spec
+
+docs: ## Generate API docs
+docs: $(SRC_SOURCES) lib
+	$(CRYSTAL) docs
+
+.PHONY: install
+install: $(O) ## Install the compiler at DESTDIR
+	$(INSTALL) -d -m 0755 "$(BINDIR)/"
+	$(INSTALL) -m 0755 "$(O)" "$(BINDIR)/$(NAME)"
+.PHONY: uninstall
+uninstall: ## Uninstall the compiler from DESTDIR
+	rm -f "$(BINDIR)/$(NAME)"
+
+.PHONY: check
+check: ## Verify all dependencies are installed and unused removed.
+check:
+	$(SHARDS) check || $(SHARDS) install
+	$(SHARDS) prune
+
+
+lib: shard.lock
+	$(SHARDS) install
+
+shard.lock: shard.yml
+	$(SHARDS) update
+
+.PHONY: clean
+clean:
+	@rm -f $(O)
+
+.PHONY: cleanall
+cleanall: clean
+	@rm -rf ${CACHE_DIR}
+
+.PHONY: help
+help: ## Show this help
+	@echo
+	@printf '\033[34mtargets:\033[0m\n'
+	@grep -hE '^[a-zA-Z_-]+:.*?## .*$$' $(MAKEFILE_LIST) |\
+		sort |\
+		awk 'BEGIN {FS = ":.*?## "}; {printf "  \033[36m%-15s\033[0m %s\n", $$1, $$2}'
+	@echo
+	@printf '\033[34moptional variables:\033[0m\n'
+	@grep -hE '^[a-zA-Z_-]+ \?=.*?## .*$$' $(MAKEFILE_LIST) |\
+		sort |\
+		awk 'BEGIN {FS = " \\?=.*?## "}; {printf "  \033[36m%-15s\033[0m %s\n", $$1, $$2}'
+	@echo
+	@printf '\033[34mrecipes:\033[0m\n'
+	@grep -hE '^##.*$$' $(MAKEFILE_LIST) |\
+		awk 'BEGIN {FS = "## "}; /^## [a-zA-Z_-]/ {printf "  \033[36m%s\033[0m\n", $$2}; /^##  / {printf "  %s\n", $$2}'