diff --git a/roles/synapse/tasks/main.json b/roles/synapse/tasks/main.json
index 63e0e78..0450ca2 100644
--- a/roles/synapse/tasks/main.json
+++ b/roles/synapse/tasks/main.json
@@ -7,6 +7,13 @@
 			"dest": "/etc/apt/sources.list.d/bullseye-backports-for-synapse.list"
 		}
 	},
+	{
+		"name": "update sources",
+		"become": true,
+		"ansible.builtin.apt": {
+			"update_cache": true
+		}
+	},
 	{
 		"name": "prepare package installation | server-name",
 		"become": true,