diff --git a/.env.sample b/.env.sample
index b2f028f..ff03b95 100644
--- a/.env.sample
+++ b/.env.sample
@@ -88,6 +88,9 @@ LOG_LEVEL=info
 # UPLOADS_S3_SCHEME=https://
 # UPLOADS_S3_URL=
 
+# Enable using Bonfire as an SSO provider for external apps to sign in with?
+# ENABLE_SSO_PROVIDER=false
+
 # OpenID Connect: connect as a client to the OpenID Connect provider with callback url https://yourinstance.tld/oauth/client/openid_1
 # OPENID_1_DISCOVERY=
 # OPENID_1_DISPLAY_NAME=
diff --git a/compose.yml b/compose.yml
index 6cb3934..402fca5 100644
--- a/compose.yml
+++ b/compose.yml
@@ -79,6 +79,8 @@ services:
       - UPLOADS_S3_SCHEME
       - UPLOADS_S3_URL
       
+      - ENABLE_SSO_PROVIDER
+      
       - OPENID_1_DISPLAY_NAME
       - OPENID_1_DISCOVERY
       - OPENID_1_CLIENT_ID