diff --git a/postfix/Dockerfile b/postfix/Dockerfile
index 53f4e5f..f788985 100644
--- a/postfix/Dockerfile
+++ b/postfix/Dockerfile
@@ -5,10 +5,8 @@ RUN \
  # Create OS user (which will be picked up later by apk add)
  addgroup -S -g 587 postfix \
  && adduser -S -u 587 -h /var/spool/postfix -s /bin/false -g postfix -G postfix postfix \
- # Add edge/main repository
- && echo '@edge http://dl-cdn.alpinelinux.org/alpine/edge/main' >>/etc/apk/repositories \
- # Install Postfix 3.3
- && apk --no-cache add ca-certificates postfix@edge \
+ # Install Postfix
+ && apk --no-cache add ca-certificates postfix \
  # Build aliases database
  && newaliases \
  # Cleanup
diff --git a/postgres/Dockerfile b/postgres/Dockerfile
index c58c97e..ddcca4c 100644
--- a/postgres/Dockerfile
+++ b/postgres/Dockerfile
@@ -6,10 +6,9 @@ RUN \
  sed -i 's/postgres:x:70:70/postgres:x:5432:5432/' /etc/passwd \
  && sed -i 's/postgres:x:70/postgres:x:5432/' /etc/group \
  # Add edge/testing repository for postgis support
- && echo '@edgetest http://dl-cdn.alpinelinux.org/alpine/edge/testing' >>/etc/apk/repositories \
- && echo '@edgemain http://dl-cdn.alpinelinux.org/alpine/edge/main' >>/etc/apk/repositories \
- # Install PostgreSQL + PostGIS (JSON-C is a dependency for PostGIS)
- && apk --no-cache add json-c@edgemain postgresql postgresql-contrib postgis@edgetest \
+ && echo '@edge http://dl-cdn.alpinelinux.org/alpine/edge/testing' >>/etc/apk/repositories \
+  # Install PostgreSQL + PostGIS
+ && apk --no-cache add postgresql postgresql-contrib postgis@edge \
  # Create socket directory 
  && mkdir /run/postgresql \
  && chown postgres:postgres /run/postgresql