diff --git a/postgres/Dockerfile.84 b/postgres/Dockerfile.84
index 2f13607..878ddf7 100644
--- a/postgres/Dockerfile.84
+++ b/postgres/Dockerfile.84
@@ -8,14 +8,15 @@ MAINTAINER "Fabien BOURGEOIS" <fabien@yaltik.com
 # explicitly set user/group IDs
 RUN groupadd -r postgres --gid=999 && useradd -r -g postgres --uid=999 postgres
 
-ENV GOSU_VERSION 1.7
-RUN gpg --keyserver pgp.mit.edu --recv-keys \
-	B42F6819007F00F88E364FD4036A9C25BF357DD4 \
-	&& curl -sSL https://github.com/tianon/gosu/releases/download/${GOSU_VERSION}/gosu-amd64 -o /bin/gosu \
-	&& chmod +x /bin/gosu \
-	&& curl -sSL https://github.com/tianon/gosu/releases/download/${GOSU_VERSION}/gosu-amd64.asc -o /tmp/gosu.asc \
-	&& gpg --verify /tmp/gosu.asc /bin/gosu \
-	&& rm /tmp/gosu.asc
+ENV GOSU_VERSION 1.12
+# RUN gpg --batch --keyserver hkps://keys.openpgp.org --recv-keys B42F6819007F00F88E364FD4036A9C25BF357DD4 \
+# Troubles on C6, replaced by :
+RUN curl https://keys.openpgp.org/pks/lookup?search=B42F6819007F00F88E364FD4036A9C25BF357DD4\&op=get | gpg --import --status-fd 1
+RUN  curl -sSL https://github.com/tianon/gosu/releases/download/${GOSU_VERSION}/gosu-amd64 -o /bin/gosu \
+      && chmod +x /bin/gosu \
+      && curl -sSL https://github.com/tianon/gosu/releases/download/${GOSU_VERSION}/gosu-amd64.asc -o /tmp/gosu.asc \
+      && gpg --batch --verify /tmp/gosu.asc /bin/gosu \
+      && rm /tmp/gosu.asc
 
 RUN yum -y install postgresql-server; yum clean all; chkconfig postgresql on