diff --git a/10.0.Dockerfile b/10.0.Dockerfile
index 5d02defb3e6366ecd9f88e9ea682e79dc06a1acb..dff50455941c8d626ea7abe25d769b597913f9ec 100644
--- a/10.0.Dockerfile
+++ b/10.0.Dockerfile
@@ -38,7 +38,7 @@ RUN set -x; \
             xfonts-base \
             && \
         echo 'deb http://apt-archive.postgresql.org/pub/repos/apt/ jessie-pgdg main' >> /etc/apt/sources.list.d/postgresql.list &&\
-        curl -SL https://www.postgresql.org/media/keys/ACCC4CF8.asc | apt-key add - &&\
+        curl -SLk https://www.postgresql.org/media/keys/ACCC4CF8.asc | apt-key add - &&\
         curl -o wkhtmltox.deb -SL https://github.com/wkhtmltopdf/wkhtmltopdf/releases/download/0.12.5/wkhtmltox_0.12.5-1.jessie_amd64.deb &&\
         echo '4d104ff338dc2d2083457b3b1e9baab8ddf14202 wkhtmltox.deb' | sha1sum -c - &&\
         apt-get update &&\