diff --git a/_config.yml b/_config.yml
index f1ab345..d1016f1 100644
--- a/_config.yml
+++ b/_config.yml
@@ -14,10 +14,10 @@ customize:
         enabled: true
         width: 40
         height: 40
-        url: images/logo.png
+        url: images/tbf-icon.svg
     profile:
         enabled: true # Whether to show profile bar
-        avatar: css/images/avatar.png
+        avatar: css/images/tbf-icon.svg
         gravatar: # Gravatar email address, if you enable Gravatar, your avatar config will be overriden
         author: 技術書典
         author_title: 技術書のお祭り！
diff --git a/source/css/images/tbf-icon.svg b/source/css/images/tbf-icon.svg
new file mode 100644
index 0000000..c9307e8
--- /dev/null
+++ b/source/css/images/tbf-icon.svg
@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<svg version="1.1"
+	 xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px" viewBox="0 0 300 300"
+	 style="enable-background:new 0 0 300 300;" xml:space="preserve">
+<style type="text/css">
+	.st0{fill:#53C269;}
+</style>
+<switch>
+	<g>
+		<path class="st0" d="M150,0C67.157,0,0,67.157,0,150c0,82.843,67.157,150,150,150c82.843,0,150-67.157,150-150
+			C300,67.157,232.843,0,150,0z M179.374,244.932c-16.856,16.856-44.185,16.856-61.041,0l-64.412-64.412
+			c-16.856-16.856-16.856-44.185,0-61.041l64.412-64.412c16.856-16.856,44.185-16.856,61.041,0l86.28,86.28h-91.01
+			c-3.718-11.085-14.373-18.988-26.812-18.533c-14.37,0.526-25.96,12.382-26.179,26.76c-0.232,15.219,12.035,27.629,27.201,27.629
+			c11.998,0,22.175-7.771,25.791-18.552h91.01L179.374,244.932z"/>
+	</g>
+</switch>
+</svg>