diff --git a/Makefile b/Makefile
index fb72b99..0f21889 100644
--- a/Makefile
+++ b/Makefile
@@ -22,9 +22,9 @@ man/man1/%.1: %.lisp build-manual.sh Makefile
 	mv $(@F) man/man1/
 
 install: $(names)
-	cp -p bin/* /usr/local/bin
+	sudo cp -p bin/* /usr/local/bin
 	mkdir -p /usr/local/man/man1
-	cp -p man1/* /usr/local/man/man1/
+	sudo cp -p man1/* /usr/local/man/man1/
 
 clean:
 	rm -rf bin man *.fasl