diff --git a/testing/matrix-sdk-integration-testing/assets/docker-compose.yml b/testing/matrix-sdk-integration-testing/assets/docker-compose.yml
index 4dd73cac6..4600d68ec 100644
--- a/testing/matrix-sdk-integration-testing/assets/docker-compose.yml
+++ b/testing/matrix-sdk-integration-testing/assets/docker-compose.yml
@@ -27,6 +27,7 @@ services:
   sliding-sync-proxy:
     image: ghcr.io/matrix-org/sliding-sync:v0.99.11
     depends_on:
+      synapse:
       postgres:
         condition: service_healthy
     environment: