diff --git a/vendor/go.uber.org/zap/Makefile b/vendor/go.uber.org/zap/Makefile
new file mode 100644
index 0000000..9b1bc3b
--- /dev/null
+++ b/vendor/go.uber.org/zap/Makefile
@@ -0,0 +1,73 @@
+export GOBIN ?= $(shell pwd)/bin
+
+GOLINT = $(GOBIN)/golint
+STATICCHECK = $(GOBIN)/staticcheck
+BENCH_FLAGS ?= -cpuprofile=cpu.pprof -memprofile=mem.pprof -benchmem
+
+# Directories containing independent Go modules.
+#
+# We track coverage only for the main module.
+MODULE_DIRS = . ./benchmarks ./zapgrpc/internal/test
+
+# Many Go tools take file globs or directories as arguments instead of packages.
+GO_FILES := $(shell \
+	find . '(' -path '*/.*' -o -path './vendor' ')' -prune \
+	-o -name '*.go' -print | cut -b3-)
+
+.PHONY: all
+all: lint test
+
+.PHONY: lint
+lint: $(GOLINT) $(STATICCHECK)
+	@rm -rf lint.log
+	@echo "Checking formatting..."
+	@gofmt -d -s $(GO_FILES) 2>&1 | tee lint.log
+	@echo "Checking vet..."
+	@$(foreach dir,$(MODULE_DIRS),(cd $(dir) && go vet ./... 2>&1) &&) true | tee -a lint.log
+	@echo "Checking lint..."
+	@$(foreach dir,$(MODULE_DIRS),(cd $(dir) && $(GOLINT) ./... 2>&1) &&) true | tee -a lint.log
+	@echo "Checking staticcheck..."
+	@$(foreach dir,$(MODULE_DIRS),(cd $(dir) && $(STATICCHECK) ./... 2>&1) &&) true | tee -a lint.log
+	@echo "Checking for unresolved FIXMEs..."
+	@git grep -i fixme | grep -v -e Makefile | tee -a lint.log
+	@echo "Checking for license headers..."
+	@./checklicense.sh | tee -a lint.log
+	@[ ! -s lint.log ]
+	@echo "Checking 'go mod tidy'..."
+	@make tidy
+	@if ! git diff --quiet; then \
+		echo "'go mod tidy' resulted in changes or working tree is dirty:"; \
+		git --no-pager diff; \
+	fi
+
+$(GOLINT):
+	cd tools && go install golang.org/x/lint/golint
+
+$(STATICCHECK):
+	cd tools && go install honnef.co/go/tools/cmd/staticcheck
+
+.PHONY: test
+test:
+	@$(foreach dir,$(MODULE_DIRS),(cd $(dir) && go test -race ./...) &&) true
+
+.PHONY: cover
+cover:
+	go test -race -coverprofile=cover.out -coverpkg=./... ./...
+	go tool cover -html=cover.out -o cover.html
+
+.PHONY: bench
+BENCH ?= .
+bench:
+	@$(foreach dir,$(MODULE_DIRS), ( \
+		cd $(dir) && \
+		go list ./... | xargs -n1 go test -bench=$(BENCH) -run="^$$" $(BENCH_FLAGS) \
+	) &&) true
+
+.PHONY: updatereadme
+updatereadme:
+	rm -f README.md
+	cat .readme.tmpl | go run internal/readme/readme.go > README.md
+
+.PHONY: tidy
+tidy:
+	@$(foreach dir,$(MODULE_DIRS),(cd $(dir) && go mod tidy) &&) true