diff --git a/Troubleshooting.md b/Troubleshooting.md
new file mode 100644
index 0000000..75552b8
--- /dev/null
+++ b/Troubleshooting.md
@@ -0,0 +1,16 @@
+
+## Uptime Kuma reports DOWN, but I can access.
+
+If your Uptime Kuma reports DOWN of your service, sometimes you would like to know it is a bug of Uptime Kuma or your own Docker network issue.
+
+Go into your container's bash.
+
+```
+docker exec -it uptime-kuma bash
+```
+
+Then you can test with these commands for example:
+```
+curl https://google.com
+ping google.com
+```
diff --git a/🆙-How-to-Update.md b/🆙-How-to-Update.md
index 6342075..d4770d6 100644
--- a/🆙-How-to-Update.md
+++ b/🆙-How-to-Update.md
@@ -34,7 +34,7 @@ cd <uptime-kuma-directory>
 
 # Update from git
 git fetch --all
-git checkout 1.17.0 --force
+git checkout 1.17.1 --force
 
 # Install dependencies and prebuilt
 npm install --production