diff --git a/docker-compose.yml b/docker-compose.yml
index 795ee91..5bea664 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -136,7 +136,7 @@ services:
       # Enable browser policy and allow one trusted URL that can have iframe that has Wekan embedded inside.
       # Setting this to false is not recommended, it also disables all other browser policy protections
       # and allows all iframing etc. See wekan/server/policy.js
-      - BROWSER_POLICY_ENABLED=true
+      - BROWSER_POLICY_ENABLED='true'
       # When browser policy is enabled, HTML code at this Trusted URL can have iframe that embeds Wekan inside.
       - TRUSTED_URL=''
       #---------------------------------------------------------------