diff --git a/docs/guides/auth/github.md b/docs/guides/auth/github.md
index 62910cb..d6a1095 100644
--- a/docs/guides/auth/github.md
+++ b/docs/guides/auth/github.md
@@ -1,6 +1,8 @@
 Authentication guide - GitHub
 ===
 
+***Note:** This guide was written before the renaming. Just replace `HackMD` with `CodiMD` in your mind :smile: thanks!*
+
 1. Sign-in or sign-up for a GitHub account
 2. Navigate to developer settings in your GitHub account [here](https://github.com/settings/developers) and select the "OAuth Apps" tab
 3. Click on the **New OAuth App** button, to create a new OAuth App:
diff --git a/docs/guides/auth/gitlab-self-hosted.md b/docs/guides/auth/gitlab-self-hosted.md
index 361ee95..89bc996 100644
--- a/docs/guides/auth/gitlab-self-hosted.md
+++ b/docs/guides/auth/gitlab-self-hosted.md
@@ -1,6 +1,8 @@
 # GitLab (self-hosted)
 ===
 
+***Note:** This guide was written before the renaming. Just replace `HackMD` with `CodiMD` in your mind :smile: thanks!*
+
 1. Sign in to your GitLab
 2. Navigate to the application management page at `https://your.gitlab.domain/admin/applications` (admin permissions required)
 3. Click **New application** to create a new application and fill out the registration form:
diff --git a/docs/guides/auth/saml-onelogin.md b/docs/guides/auth/saml-onelogin.md
index 245876c..02a5ffa 100644
--- a/docs/guides/auth/saml-onelogin.md
+++ b/docs/guides/auth/saml-onelogin.md
@@ -1,6 +1,8 @@
 Authentication guide - SAML (OneLogin)
 ===
 
+***Note:** This guide was written before the renaming. Just replace `HackMD` with `CodiMD` in your mind :smile: thanks!*
+
 1. Sign-in or sign-up for an OneLogin account. (available free trial for 2 weeks)
 2. Go to the administration page.
 3. Select the **APPS** menu and click on the **Add Apps**.
diff --git a/docs/guides/auth/saml.md b/docs/guides/auth/saml.md
index 9a51667..97ac9d3 100644
--- a/docs/guides/auth/saml.md
+++ b/docs/guides/auth/saml.md
@@ -1,6 +1,8 @@
 Authentication guide - SAML
 ===
 
+***Note:** This guide was written before the renaming. Just replace `HackMD` with `CodiMD` in your mind :smile: thanks!*
+
 The basic procedure is the same as the case of OneLogin which is mentioned in [OneLogin-Guide](./saml-onelogin.md). If you want to match your IdP, you can use more configurations as below.
 
 * If your IdP accepts metadata XML of the service provider to ease configuraion, use this url to download metadata XML.
diff --git a/docs/guides/auth/twitter.md b/docs/guides/auth/twitter.md
index 02309ca..1b96288 100644
--- a/docs/guides/auth/twitter.md
+++ b/docs/guides/auth/twitter.md
@@ -1,6 +1,8 @@
 Authentication guide - Twitter
 ===
 
+***Note:** This guide was written before the renaming. Just replace `HackMD` with `CodiMD` in your mind :smile: thanks!*
+
 1. Sign-in or sign-up for a Twitter account
 2. Go to the Twitter Application management page [here](https://apps.twitter.com/)
 3. Click on the **Create New App** button to create a new Twitter app:
diff --git a/docs/guides/minio-image-upload.md b/docs/guides/minio-image-upload.md
index c2ba25b..7f5796c 100644
--- a/docs/guides/minio-image-upload.md
+++ b/docs/guides/minio-image-upload.md
@@ -1,6 +1,8 @@
-Minio Guide for HackMD
+Minio Guide for CodiMD
 ===
 
+***Note:** This guide was written before the renaming. Just replace `HackMD` with `CodiMD` in your mind :smile: thanks!*
+
 1. First of all you need to setup Minio itself.
 
    Please refer to the [official Minio docs](https://docs.minio.io/) for an
diff --git a/docs/guides/s3-image-upload.md b/docs/guides/s3-image-upload.md
index ff9598a..dc5e420 100644
--- a/docs/guides/s3-image-upload.md
+++ b/docs/guides/s3-image-upload.md
@@ -1,4 +1,6 @@
-# Guide - Setup HackMD S3 image upload
+# Guide - Setup CodiMD S3 image upload
+
+***Note:** This guide was written before the renaming. Just replace `HackMD` with `CodiMD` in your mind :smile: thanks!*
 
 1. Go to [AWS S3 console](https://console.aws.amazon.com/s3/home) and create a new bucket.