diff --git a/Makefile b/Makefile
index bb48cfb..c36cbbc 100644
--- a/Makefile
+++ b/Makefile
@@ -4,7 +4,7 @@ install-frontend:
 
 .PHONY: install-frontend-ci
 install-frontend-ci:
-	cd web && npm ci --ignore-scripts
+	cd web && npm ci --ignore-scripts --omit=optional
 
 .PHONY: install-frontend-ci-clean
 install-frontend-ci-clean: install-frontend-ci