diff --git a/Dockerfile b/Dockerfile
index d28fd6c..c6597d8 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM nginx:1.17.8-alpine
+FROM nginx:1.17.9-alpine
 
 RUN \
   apk add --no-cache \
@@ -29,7 +29,7 @@ EXPOSE 80 443
 RUN \
     git clone https://git.tt-rss.org/fox/tt-rss.git /var/lib/tt-rss && \
     cd /var/lib/tt-rss && \
-    git checkout 076c5382fafcaf5ffd2bd41752e8e3c3b20e6af0
+    git checkout 61be0b215db850395ef2746a5b7499f39db30662
 
 WORKDIR /app
 COPY CHECKS /app/CHECKS
diff --git a/Readme.md b/Readme.md
index a3ab108..6eb8fa1 100644
--- a/Readme.md
+++ b/Readme.md
@@ -9,8 +9,8 @@ dokku plugin:install https://github.com/dokku/dokku-postgres.git
 
 dokku apps:create ttrss
 dokku ps:scale ttrss web=0
-dokku postgres:create ttrssdb_11_2
-dokku postgres:link ttrssdb_11_2 ttrss
+dokku postgres:create ttrss-postgres-12_2 --image-version 12.2
+dokku postgres:link ttrss-postgres-12_2 ttrss
 dokku config:set ttrss SELF_URL_PATH=http://ttrss.example.com/
 
 git remote add dokku dokku@example.com:ttrrs
@@ -58,15 +58,13 @@ rm ttrss.db
 ### Database
 
 ```bash
-# upgrade from Postgres 10.2 to 11.4
+# upgrade from Postgres 11.6 to 12.2
 dokku plugins:upgrade postgres
-dokku postgres:create ttrssdb_11_4
-dokku postgres:export ttrssdb_10_2 > ttrss.db
-dokku postgres:import ttrssdb_11_4 < ttrss.db
-dokku postgres:link ttrssdb_11_4 ttrss
-dokku postgres:promote ttrssdb_11_4 ttrss
+dokku postgres:clone ttrss-postgres-11_6 ttrss-postgres-12_2 --image-version 12.2
+dokku postgres:link ttrss-postgres-12_2 ttrss
+dokku postgres:promote ttrss-postgres-12_2 ttrss
 
 # check app is working, then delete old database
-dokku postgres:unlink ttrssdb_10_2 ttrss
-dokku postgres:destroy ttrssdb_10_2
+dokku postgres:unlink ttrss-postgres-11_6 ttrss
+dokku postgres:destroy ttrss-postgres-11_6
 ```