merge develop

3 files changed, 5 insertions, 5 deletions

diff --git a/docs/installation/debian_based_en.md b/docs/installation/debian_based_en.md
index 62d8733f7..2c20d521a 100644
--- a/docs/installation/debian_based_en.md
+++ b/docs/installation/debian_based_en.md
@@ -38,8 +38,8 @@ sudo apt install git build-essential postgresql postgresql-contrib
 * Download and add the Erlang repository:
 
 ```shell
-wget -P /tmp/ https://packages.erlang-solutions.com/erlang-solutions_1.0_all.deb
-sudo dpkg -i /tmp/erlang-solutions_1.0_all.deb
+wget -P /tmp/ https://packages.erlang-solutions.com/erlang-solutions_2.0_all.deb
+sudo dpkg -i /tmp/erlang-solutions_2.0_all.deb
 ```
 
 * Install Elixir and Erlang:
diff --git a/docs/installation/debian_based_jp.md b/docs/installation/debian_based_jp.md
index a3c4621d8..1e5a9be91 100644
--- a/docs/installation/debian_based_jp.md
+++ b/docs/installation/debian_based_jp.md
@@ -40,8 +40,8 @@ sudo apt install git build-essential postgresql postgresql-contrib
 
 * Erlangのリポジトリをダウンロードおよびインストールします。
 ```
-wget -P /tmp/ https://packages.erlang-solutions.com/erlang-solutions_1.0_all.deb
-sudo dpkg -i /tmp/erlang-solutions_1.0_all.deb
+wget -P /tmp/ https://packages.erlang-solutions.com/erlang-solutions_2.0_all.deb
+sudo dpkg -i /tmp/erlang-solutions_2.0_all.deb
 ```
 
 * ElixirとErlangをインストールします、
diff --git a/docs/installation/otp_en.md b/docs/installation/otp_en.md
index fb99af699..86135cd20 100644
--- a/docs/installation/otp_en.md
+++ b/docs/installation/otp_en.md
@@ -63,7 +63,7 @@ apt install postgresql-11-rum
 ```
 
 #### (Optional) Performance configuration
-For optimal performance, you may use [PGTune](https://pgtune.leopard.in.ua), don't forget to restart postgresql after editing the configuration
+It is encouraged to check [Optimizing your PostgreSQL performance](../configuration/postgresql.md) document, for tips on PostgreSQL tuning.
 
 ```sh tab="Alpine"
 rc-service postgresql restart