diff --git a/engine/examples/postgresql_service.md b/engine/examples/postgresql_service.md
index 5b1898d757..b7b9ae2ae1 100644
--- a/engine/examples/postgresql_service.md
+++ b/engine/examples/postgresql_service.md
@@ -28,7 +28,7 @@ FROM ubuntu:16.04
 RUN apt-key adv --keyserver hkp://p80.pool.sks-keyservers.net:80 --recv-keys B97B0AFCAA1A47F044F244A07FCC7D46ACCC4CF8
 
 # Add PostgreSQL's repository. It contains the most recent stable release
-#     of PostgreSQL, ``9.3``.
+#  of PostgreSQL.
 RUN echo "deb http://apt.postgresql.org/pub/repos/apt/ precise-pgdg main" > /etc/apt/sources.list.d/pgdg.list
 
 # Install ``python-software-properties``, ``software-properties-common`` and PostgreSQL 9.3