diff --git a/mk/install.mk b/mk/install.mk
index 18c51bf..81fdcb9 100644
--- a/mk/install.mk
+++ b/mk/install.mk
@@ -11,8 +11,8 @@ install-dnsmanager-client: build-client
 	$(Q)install -D -m 555 ./bin/dnsmanager-client $(DESTDIR)$(BINDIR)/dnsmanager-client
 install-binaries: install-dnsmanagerd install-dnsmanager-client
 
-gz-man-dnsmanager-client:; $(Q)gzip -k --best ./man/dnsmanager-client.1
-gz-man-dnsmanagerd:;       $(Q)gzip -k --best ./man/dnsmanagerd.1
+gz-man-dnsmanager-client:; $(Q)gzip -k -f --best ./man/dnsmanager-client.1
+gz-man-dnsmanagerd:;       $(Q)gzip -k -f --best ./man/dnsmanagerd.1
 
 install-man-dnsmanagerd: gz-man-dnsmanagerd
 	$(Q)install -D -m 444 ./man/dnsmanagerd.1.gz $(DESTDIR)$(MANDIR)/man1/dnsmanagerd.1.gz