diff --git a/_includes/sidebar.html b/_includes/sidebar.html
index 4ab9f12..5fd3eb0 100644
--- a/_includes/sidebar.html
+++ b/_includes/sidebar.html
@@ -6,16 +6,18 @@
   <div class="profile-wrapper text-center">
     <div id="avatar">
       <a href="{{ '/' | relative_url }}" alt="avatar" class="mx-auto">
-        {% capture avatar_url %}
-          {%- if site.avatar contains '://' -%}
-            {{ site.avatar }}
-          {%- elsif site.img_cdn != '' and site.img_cdn -%}
-            {{ site.avatar | prepend: site.img_cdn }}
-          {%- else -%}
-            {{ site.avatar | relative_url }}
-          {%- endif -%}
-        {% endcapture %}
-        <img src="{{ avatar_url }}" alt="avatar" onerror="this.style.display='none'">
+        {% if site.avatar != '' and site.avatar %}
+          {% capture avatar_url %}
+            {%- if site.avatar contains '://' -%}
+              {{ site.avatar }}
+            {%- elsif site.img_cdn != '' and site.img_cdn -%}
+              {{ site.avatar | prepend: site.img_cdn }}
+            {%- else -%}
+              {{ site.avatar | relative_url }}
+            {%- endif -%}
+          {% endcapture %}
+          <img src="{{ avatar_url }}" alt="avatar" onerror="this.style.display='none'">
+        {% endif %}
       </a>
     </div>
 
diff --git a/_javascript/copyright b/_javascript/copyright
index 2cd3e11..3cd7337 100644
--- a/_javascript/copyright
+++ b/_javascript/copyright
@@ -1,5 +1,5 @@
 /*!
- * Chirpy v4.3.0 (https://github.com/cotes2020/jekyll-theme-chirpy/)
+ * Chirpy v4.3.1 (https://github.com/cotes2020/jekyll-theme-chirpy/)
  * © 2019 Cotes Chung
  * MIT Licensed
  */
diff --git a/_posts/2019-08-08-text-and-typography.md b/_posts/2019-08-08-text-and-typography.md
index 65756a3..73189b4 100644
--- a/_posts/2019-08-08-text-and-typography.md
+++ b/_posts/2019-08-08-text-and-typography.md
@@ -8,8 +8,8 @@ math: true
 mermaid: true
 image:
   src: /commons/devices-mockup.png
-  width: 850
-  height: 585
+  width: 800
+  height: 500
 ---
 
 This post is to show Markdown syntax rendering on [**Chirpy**](https://github.com/cotes2020/jekyll-theme-chirpy/fork), you can also use it as an example of writing. Now, let's start looking at text and typography.
diff --git a/_posts/2019-08-09-getting-started.md b/_posts/2019-08-09-getting-started.md
index 742f1d9..7704ce6 100644
--- a/_posts/2019-08-09-getting-started.md
+++ b/_posts/2019-08-09-getting-started.md
@@ -165,7 +165,7 @@ It depends on how you use the theme:
     And then execute the following command:
 
     ```console
-    $ bundle update jekyll-theme-chirpy
+  $ bundle update jekyll-theme-chirpy
     ```
 
     As the version upgrades, the critical files (for details, see the [Startup Template][starter]) and configuration options will change. Please refer to the [Upgrade Guide](https://github.com/cotes2020/jekyll-theme-chirpy/wiki/Upgrade-Guide) to keep your repo's files in sync with the latest version of the theme.
diff --git a/_sass/jekyll-theme-chirpy.scss b/_sass/jekyll-theme-chirpy.scss
index 03f9495..f23275e 100644
--- a/_sass/jekyll-theme-chirpy.scss
+++ b/_sass/jekyll-theme-chirpy.scss
@@ -1,7 +1,7 @@
 /*!
  * The styles for Jekyll theme Chirpy
  *
- * Chirpy v4.3.0 (https://github.com/cotes2020/jekyll-theme-chirpy)
+ * Chirpy v4.3.1 (https://github.com/cotes2020/jekyll-theme-chirpy)
  * © 2019 Cotes Chung
  * MIT Licensed
  */
diff --git a/assets/js/dist/categories.min.js b/assets/js/dist/categories.min.js
index 397f72e..de6f17d 100644
--- a/assets/js/dist/categories.min.js
+++ b/assets/js/dist/categories.min.js
@@ -1,5 +1,5 @@
 /*!
- * Chirpy v4.3.0 (https://github.com/cotes2020/jekyll-theme-chirpy/)
+ * Chirpy v4.3.1 (https://github.com/cotes2020/jekyll-theme-chirpy/)
  * © 2019 Cotes Chung
  * MIT Licensed
  */
diff --git a/assets/js/dist/commons.min.js b/assets/js/dist/commons.min.js
index 02d9bef..b058bbe 100644
--- a/assets/js/dist/commons.min.js
+++ b/assets/js/dist/commons.min.js
@@ -1,5 +1,5 @@
 /*!
- * Chirpy v4.3.0 (https://github.com/cotes2020/jekyll-theme-chirpy/)
+ * Chirpy v4.3.1 (https://github.com/cotes2020/jekyll-theme-chirpy/)
  * © 2019 Cotes Chung
  * MIT Licensed
  */
diff --git a/assets/js/dist/home.min.js b/assets/js/dist/home.min.js
index 96dbf97..3aeeb3a 100644
--- a/assets/js/dist/home.min.js
+++ b/assets/js/dist/home.min.js
@@ -1,5 +1,5 @@
 /*!
- * Chirpy v4.3.0 (https://github.com/cotes2020/jekyll-theme-chirpy/)
+ * Chirpy v4.3.1 (https://github.com/cotes2020/jekyll-theme-chirpy/)
  * © 2019 Cotes Chung
  * MIT Licensed
  */
diff --git a/assets/js/dist/page.min.js b/assets/js/dist/page.min.js
index e8c36c1..fa76b1b 100644
--- a/assets/js/dist/page.min.js
+++ b/assets/js/dist/page.min.js
@@ -1,5 +1,5 @@
 /*!
- * Chirpy v4.3.0 (https://github.com/cotes2020/jekyll-theme-chirpy/)
+ * Chirpy v4.3.1 (https://github.com/cotes2020/jekyll-theme-chirpy/)
  * © 2019 Cotes Chung
  * MIT Licensed
  */
diff --git a/assets/js/dist/post.min.js b/assets/js/dist/post.min.js
index fb65b50..86265c0 100644
--- a/assets/js/dist/post.min.js
+++ b/assets/js/dist/post.min.js
@@ -1,5 +1,5 @@
 /*!
- * Chirpy v4.3.0 (https://github.com/cotes2020/jekyll-theme-chirpy/)
+ * Chirpy v4.3.1 (https://github.com/cotes2020/jekyll-theme-chirpy/)
  * © 2019 Cotes Chung
  * MIT Licensed
  */
diff --git a/assets/js/dist/pvreport.min.js b/assets/js/dist/pvreport.min.js
index 5d011b8..1cc998e 100644
--- a/assets/js/dist/pvreport.min.js
+++ b/assets/js/dist/pvreport.min.js
@@ -1,5 +1,5 @@
 /*!
- * Chirpy v4.3.0 (https://github.com/cotes2020/jekyll-theme-chirpy/)
+ * Chirpy v4.3.1 (https://github.com/cotes2020/jekyll-theme-chirpy/)
  * © 2019 Cotes Chung
  * MIT Licensed
  */
diff --git a/jekyll-theme-chirpy.gemspec b/jekyll-theme-chirpy.gemspec
index 510847c..6ad115e 100644
--- a/jekyll-theme-chirpy.gemspec
+++ b/jekyll-theme-chirpy.gemspec
@@ -2,7 +2,7 @@
 
 Gem::Specification.new do |spec|
   spec.name          = "jekyll-theme-chirpy"
-  spec.version       = "4.3.0"
+  spec.version       = "4.3.1"
   spec.authors       = ["Cotes Chung"]
   spec.email         = ["cotes.chung@gmail.com"]
 
diff --git a/package.json b/package.json
index 8b8c0e0..70efb7d 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "jekyll-theme-chirpy",
-  "version": "4.3.0",
+  "version": "4.3.1",
   "description": "A minimal, sidebar, responsive web design Jekyll theme that focuses on text presentation.",
   "main": "index.js",
   "directories": {