diff --git a/docker-compose.yml b/docker-compose.yml
index d2fb4ae..03418aa 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -72,6 +72,7 @@ services:
           - INSTALL_XDEBUG=${PHP_FPM_INSTALL_XDEBUG}
           - INSTALL_BLACKFIRE=${INSTALL_BLACKFIRE}
           - INSTALL_SOAP=${PHP_FPM_INSTALL_SOAP}
+          - INSTALL_IMAP=${PHP_FPM_INSTALL_IMAP}
           - INSTALL_MONGO=${PHP_FPM_INSTALL_MONGO}
           - INSTALL_AMQP=${PHP_FPM_INSTALL_AMQP}
           - INSTALL_MSSQL=${PHP_FPM_INSTALL_MSSQL}