diff --git a/Makefile b/Makefile
index 1efd5c9..d9acae0 100644
--- a/Makefile
+++ b/Makefile
@@ -56,10 +56,18 @@ build: deps
 		-o gfmrun-linux-amd64-$(VERSION_VALUE) \
 		-ldflags "$(GOBUILD_LDFLAGS)" \
 		./cmd/gfmrun/main.go && \
+	GOOS=linux GOARCH=arm64 $(GO) build \
+		-o gfmrun-linux-arm64-$(VERSION_VALUE) \
+		-ldflags "$(GOBUILD_LDFLAGS)" \
+		./cmd/gfmrun/main.go && \
 	GOOS=darwin GOARCH=amd64 $(GO) build \
 		-o gfmrun-darwin-amd64-$(VERSION_VALUE) \
 		-ldflags "$(GOBUILD_LDFLAGS)" \
 		./cmd/gfmrun/main.go && \
+	GOOS=darwin GOARCH=arm64 $(GO) build \
+		-o gfmrun-darwin-arm64-$(VERSION_VALUE) \
+		-ldflags "$(GOBUILD_LDFLAGS)" \
+		./cmd/gfmrun/main.go && \
 	GOOS=windows GOARCH=amd64 $(GO) build \
 		-o gfmrun-windows-amd64-$(VERSION_VALUE).exe \
 		-ldflags "$(GOBUILD_LDFLAGS)" \
diff --git a/README.md b/README.md
index 0cbfa00..82400c2 100644
--- a/README.md
+++ b/README.md
@@ -58,13 +58,13 @@ import (
   "fmt"
   "os"
 
-  "golang.org/x/example/stringutil"
+  "golang.org/x/example/hello/reverse"
 )
 
 func main() {
   fmt.Printf("---> %v\n", os.Args[0])
   fmt.Println("we could make an entire album out of this one sound")
-  fmt.Println(stringutil.Reverse("[SQUEAK INTENSIFIES]"))
+  fmt.Println(reverse.String("[SQUEAK INTENSIFIES]"))
 }
 ```