diff --git a/Dockerfile b/Dockerfile
index f81e9b3..4c24bbc 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -14,7 +14,7 @@ RUN wget --quiet -O - https://www.postgresql.org/media/keys/ACCC4CF8.asc | apt-k
  && apt-get update \
  && apt-get install -y postgresql-${PG_VERSION} postgresql-client-${PG_VERSION} postgresql-contrib-${PG_VERSION} \
  && rm -rf /var/lib/postgresql \
- && rm -rf /var/lib/apt/lists/* # 20150712
+ && rm -rf /var/lib/apt/lists/*
 
 ADD start /start
 RUN chmod 755 /start