diff --git a/.env.sample b/.env.sample
index c7c89a8..b2577f2 100644
--- a/.env.sample
+++ b/.env.sample
@@ -7,3 +7,5 @@ LETS_ENCRYPT_ENV=production
 HOMESERVER=matrix-synapse.example.com
 SERVER_NAME=mymatrix
 BRAND=mymatrix
+
+USE_SSO=false
\ No newline at end of file
diff --git a/abra.sh b/abra.sh
index 39249a3..eda1b06 100644
--- a/abra.sh
+++ b/abra.sh
@@ -1 +1 @@
-export CONFIG_JSON_VERSION=v3
+export CONFIG_JSON_VERSION=v4
diff --git a/compose.yml b/compose.yml
index 1063a50..cdb69b5 100644
--- a/compose.yml
+++ b/compose.yml
@@ -8,6 +8,7 @@ services:
       - DOMAIN
       - HOMESERVER
       - SERVER_NAME
+      - USE_SSO=${USE_SSO:-true}
     networks:
       - proxy
     configs:
diff --git a/config.json.tmpl b/config.json.tmpl
index efd2a9b..c1a136f 100644
--- a/config.json.tmpl
+++ b/config.json.tmpl
@@ -6,7 +6,7 @@
         }
     },
     "sso_redirect_options": {
-        "immediate": true
+        "immediate": {{ env "USE_SSO" }}
     },
     "disable_custom_urls": false,
     "disable_guests": true,