diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index b81e7a8..985c523 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -100,7 +100,7 @@ Please follow the ["fork and pull request"](https://docs.github.com/en/get-start
 
 1. **Navigate to Your Fork:** Go to your forked repository on GitHub.
 2. **Create a Pull Request:** Click the "New pull request" button.
-3. **Select Your Branch:** Select your feature branch as the head and the main branch of the original OmAgent repository as the base.
+3. **Select Your Branch:** Select your feature branch as the head and the latest develop branch of the original OmAgent repository as the base.
 4. **Add a Description:** Provide a clear description of your changes.
 5. **Submit Your Pull Request:** Click the "Create pull request" button.
 
@@ -117,6 +117,6 @@ Here are some useful commands:
 * **List branches:** `git branch`
 * **Switch to a branch:** `git checkout branch-name`
 * **Merge branches:** `git merge other-branch`
-* **Pull changes from upstream:** `git pull upstream main`
+* **Pull changes from upstream:** `git pull upstream branch-name`
 
 **Thank you for your contributions!**
\ No newline at end of file
diff --git a/README.md b/README.md
index dcd2d4d..61a776b 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,5 @@
 <div>
-    <h1> <img src="docs/images/logo.png" height=33 align="texttop">OmAgent</h1>
+    <h1> <img src="docs/images/logo.png" height=40 align="top"> OmAgent</h1>
 </div>
 
 <p align="center">
diff --git a/README_ZH.md b/README_ZH.md
index e20224e..5797d03 100644
--- a/README_ZH.md
+++ b/README_ZH.md
@@ -1,5 +1,5 @@
 <div>
-    <h1> <img src="docs/images/logo.png" height=30 align="texttop">OmAgent</h1>
+    <h1> <img src="docs/images/logo.png" height=40 align="top"> OmAgent</h1>
 </div>
 
 <p align="center">
diff --git a/docs/images/logo.png b/docs/images/logo.png
index c9c8897..5354881 100644
--- a/docs/images/logo.png
+++ b/docs/images/logo.png
@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:dcbffe2ea4417d00c30690faf3467f5ecbfe3b324da2f252efa30aa73e5a0850
-size 21662
+oid sha256:6f6280d40c630a91b8d19b5e022428cc73336f3e7828115fa82e589688693b06
+size 15026