diff --git a/roles/docker/tasks/services/matrix_riot.yml b/roles/docker/tasks/services/matrix_riot.yml
index a170d8e..513ed10 100644
--- a/roles/docker/tasks/services/matrix_riot.yml
+++ b/roles/docker/tasks/services/matrix_riot.yml
@@ -88,6 +88,7 @@
             - "{{ matrix.volume_folder }}/data:/data"
           environment:
             SYNAPSE_CONFIG_PATH: "/data/homeserver.yaml"
+            SYNAPSE_CACHE_FACTOR: "2"
             SYNAPSE_LOG_LEVEL: "INFO"
             VIRTUAL_HOST: "{{ matrix.domain }}"
             VIRTUAL_PORT: "8008"