diff --git a/Makefile b/Makefile
index d454b69..d9919d0 100644
--- a/Makefile
+++ b/Makefile
@@ -5,3 +5,7 @@ test:
 .PHONY: build
 build:
 	go build ./...
+
+.PHONY: clean
+clean:
+	go clean ./...
diff --git a/go.mod b/go.mod
index 7306c19..089fca7 100644
--- a/go.mod
+++ b/go.mod
@@ -1,3 +1,3 @@
 module github.com/go-piv/piv-go
 
-go 1.16
+go 1.18