diff --git a/src/govoplan_calendar/backend/manifest.py b/src/govoplan_calendar/backend/manifest.py
index 55e0a4a..8cd27b3 100644
--- a/src/govoplan_calendar/backend/manifest.py
+++ b/src/govoplan_calendar/backend/manifest.py
@@ -182,7 +182,7 @@ manifest = ModuleManifest(
     name="Calendar",
     version="0.1.8",
     required_capabilities=(CAPABILITY_AUTH_PRINCIPAL_RESOLVER, CAPABILITY_AUTH_PERMISSION_EVALUATOR),
-    optional_dependencies=("mail", "tasks", "scheduling", "appointments", "workflow", "notifications", "dms", "connectors"),
+    optional_dependencies=("mail", "tasks", "scheduling", "appointments", "workflow_engine", "notifications", "dms", "connectors"),
     provides_interfaces=(
         ModuleInterfaceProvider(name="calendar.outbox", version="0.1.8"),
         ModuleInterfaceProvider(name="calendar.scheduling", version="0.1.8"),