diff --git a/configs/open5gs/amf.yaml.in b/configs/open5gs/amf.yaml.in
index f84ed59b8..e25e7e0d6 100644
--- a/configs/open5gs/amf.yaml.in
+++ b/configs/open5gs/amf.yaml.in
@@ -255,8 +255,8 @@ tls:
 #
 #  o Metrics Server(http://<any address>:9090)
 #    metrics:
-#      addr: 0.0.0.0
-#      port: 9090
+#      - addr: 0.0.0.0
+#        port: 9090
 #
 #  <GUAMI>
 #
diff --git a/configs/open5gs/mme.yaml.in b/configs/open5gs/mme.yaml.in
index 5ae432983..4dfdc09c0 100644
--- a/configs/open5gs/mme.yaml.in
+++ b/configs/open5gs/mme.yaml.in
@@ -179,8 +179,8 @@ logger:
 #
 #  o Metrics Server(http://<any address>:9090)
 #    metrics:
-#      addr: 0.0.0.0
-#      port: 9090
+#      - addr: 0.0.0.0
+#        port: 9090
 #
 #  <GUMMEI>
 #
diff --git a/configs/open5gs/smf.yaml.in b/configs/open5gs/smf.yaml.in
index 8cf27a438..32f6f76e5 100644
--- a/configs/open5gs/smf.yaml.in
+++ b/configs/open5gs/smf.yaml.in
@@ -256,8 +256,8 @@ tls:
 #
 #  o Metrics Server(http://<any address>:9090)
 #    metrics:
-#      addr: 0.0.0.0
-#      port: 9090
+#      - addr: 0.0.0.0
+#        port: 9090
 #
 #  <Subnet for UE Pool>
 #
diff --git a/docs/_posts/2022-11-18-release-v2.5.6.md b/docs/_posts/2022-11-18-release-v2.5.6.md
index ceb1f9c1d..3f39428bb 100644
--- a/docs/_posts/2022-11-18-release-v2.5.6.md
+++ b/docs/_posts/2022-11-18-release-v2.5.6.md
@@ -95,5 +95,5 @@ scp:
 - [PFCP] Do not check qos_flow in PFCP Report message ([#1819](https://github.com/open5gs/open5gs/pull/1819)) -- [ssafaorhan](https://github.com/ssafaorhan)
 - [PFCP] Fixed invalid message of Dropped DL Traffic threshold ([#1817](https://github.com/open5gs/open5gs/pull/1817)) -- [ssafaorhan](https://github.com/ssafaorhan)
 
-Download -- [v2.5.5.tar.gz](https://github.com/open5gs/open5gs/archive/v2.5.5.tar.gz)
+Download -- [v2.5.6.tar.gz](https://github.com/open5gs/open5gs/archive/v2.5.6.tar.gz)
 {: .notice--info}