diff --git a/.env b/.env
index 43cc336..c17e466 100644
--- a/.env
+++ b/.env
@@ -8,3 +8,4 @@ PROXY_PORT=8080
 ACS_TAG=7.3.0
 AAMQ_TAG=5.17.1-jre17-centos7
 POSTGRES_TAG=13
+ALF_SYNC_SERV_TAG=3.7
diff --git a/docker-compose.yml b/docker-compose.yml
index c2be995..8f1a73e 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -35,7 +35,7 @@ services:
         image: alfresco/alfresco-activemq:${AAMQ_TAG}
 
     sync:
-        image: quay.io/alfresco/service-sync:latest
+        image: quay.io/alfresco/service-sync:${ALF_SYNC_SERV_TAG}
         environment:
             JAVA_OPTS : "
                 -Dsql.db.url=jdbc:postgresql://postgres-acs:5432/alfresco