diff --git a/README.ko.md b/README.ko.md
index 0776a9c..0fd73ba 100644
--- a/README.ko.md
+++ b/README.ko.md
@@ -456,7 +456,7 @@ root
 
 ## Contact Page
 
-현재 이용 가능한 서비스: [formspree]. 다른 서비스를 이용하고 싶으시면 새 이슈를 만들어주세요.
+현재 이용 가능한 서비스: [formspree]. 다른 서비스를 이용하고 싶으시면 새 이슈를 만들어주세요. 서비스 파라미터를 빈값으로 설정하면 마크다운으로 해당 페이지를 채울 수 있습니다.
 
 1. 파일을 다음 경로에 만들어줍니다. root/contact/index.md
 
diff --git a/README.md b/README.md
index f15709f..8a8e5f6 100644
--- a/README.md
+++ b/README.md
@@ -446,7 +446,7 @@ root
 
 ## Contact Page
 
-Currently available service: [formspree]. Open an issue if you need another service vendor.
+Currently available service: [formspree]. Open an issue if you need another service vendor. If you want just a blank page and use a markdown, set the service param empty.
 
 1. Make a file at root/contact/index.md
 
diff --git a/data/lib.toml b/data/lib.toml
index 885ae92..f31f134 100644
--- a/data/lib.toml
+++ b/data/lib.toml
@@ -1,7 +1,7 @@
 # js
 [js.mermaid]
-  sri = "sha256-JEqEejGt4tR35L0a1zodzsV0/PJ6GIf7J4yDtywdrH8="
-  url = "https://cdn.jsdelivr.net/npm/mermaid@8.4.4/dist/mermaid.min.js"
+  sri = "sha256-wV/0jM5E/0V+KqyxUio2Ve5OAC/gweTTqdbnRX1fgAE="
+  url = "https://cdn.jsdelivr.net/npm/mermaid@8.4.6/dist/mermaid.min.js"
 
 [js.katex]
   sri = "sha256-F/Xda58SPdcUCr+xhSGz9MA2zQBPb0ASEYKohl8UCHc="
@@ -43,12 +43,12 @@
   url = "https://cdn.jsdelivr.net/npm/chart.js@2.9.3/dist/Chart.min.js"
 
 [js.wavedrom]
-  sri = "sha256-IDuClDzRPosOM4bqD2e6ANDjqDwqNJrQxvXvegg47eI="
-  url = "https://cdn.jsdelivr.net/npm/wavedrom@2.1.6/wavedrom.min.js"
+  sri = "sha256-Gvxb3h9f9p1eiyr59LuWSLX/tWVncuDrHgLF9+rwkw8="
+  url = "https://cdn.jsdelivr.net/npm/wavedrom@2.3.0/wavedrom.min.js"
 
 [js.wavedrom_skin]
   sri = "sha256-AcH/tECvCrfgPUHK98GALAPyAE7XpAYyEsbpmQrniFo="
-  url = "https://cdn.jsdelivr.net/npm/wavedrom@2.1.6/skins/default.js"
+  url = "https://cdn.jsdelivr.net/npm/wavedrom@2.3.0/skins/default.js"
 
 [js.viz]
   sri = "" # no sri
diff --git a/layouts/contact/single.html b/layouts/contact/single.html
index eac88b0..f43f4c3 100644
--- a/layouts/contact/single.html
+++ b/layouts/contact/single.html
@@ -6,15 +6,17 @@
 </header>
 <main class="main">
   <div class="contact">
-    <article class="single__contents contact__desc">
-      {{ .Content }}
-    </article>
-    {{ if eq .Params.service "formspree" }}
-      {{ partial "contact/formspree" . }}
-    {{ else }}
-      {{ partial "contact/formspree" . }}
-    {{ end }}
-  </div>  
+      {{ if eq .Params.service "formspree" }}
+        <article class="single__contents contact__desc">
+          {{ .Content }}
+        </article>
+        {{ partial "contact/formspree" . }}
+      {{ else }}
+        <article class="single__contents contact__desc">
+          {{ .Content }}
+        </article>
+      {{ end }}
+  </div>
 </main>
 <div class="hide">
   {{ partial "search/site-search" . }}