diff --git a/README.md b/README.md
index 9bbaf560..3373ff01 100644
--- a/README.md
+++ b/README.md
@@ -6,11 +6,11 @@
 
 ## 如何連署？
 
-請在signatures資料夾裡面新增新的檔案，檔案命名原則為signed_by_${USERNAME}.txt，您可以在裡面寫入各種支持同婚的文字，或使用根目錄的template.txt也是可以的。（所以要請fork, git pull, git commit, git push 然後再發Pull Request）
+請在signatures資料夾裡面新增新的檔案，檔案命名原則為signed_by_${USERNAME}.md，您可以在裡面寫入各種支持同婚的文字，或使用根目錄的template.txt也是可以的。（所以要請fork, git pull, git commit, git push 然後再發Pull Request）
 
 若您懶得下這些命令，fork與clone以後，請在新增檔案後，執行：
 
-    ./sign.sh signatures/signed_by_${USERNAME}.txt
+    ./sign.sh signatures/signed_by_${USERNAME}.md
 
 並輸入您認為適合的commit message即可。
 
diff --git a/sign.sh b/sign.sh
index e4cc85b1..e09d117d 100755
--- a/sign.sh
+++ b/sign.sh
@@ -4,13 +4,13 @@
 # set -o xtrace
 
 # This is a file use to sign. Please input file as parameter.
-# Usage: ./sign.sh signed_by_${USERNAME}.txt
+# Usage: ./sign.sh signed_by_${USERNAME}.md
 
 pushd $(dirname $0)
 REPO=$(cat .git/config | grep "git@github.com" | cut -f 2 -d ':' | sed s/\.git//)
 
 git pull
-git remote add upstream https://github.com/RainbowEngineer/taiwan_love_wins.git
+git remote add upstream https://github.com/RainbowEngineer/taiwan_love_wins.git 2> /dev/null
 git fetch upstream
 git merge upstream/master
 git push
diff --git a/signatures/signed_by_bater.txt b/signatures/signed_by_bater.md
similarity index 100%
rename from signatures/signed_by_bater.txt
rename to signatures/signed_by_bater.md
diff --git a/signatures/signed_by_billy3321.txt b/signatures/signed_by_billy3321.md
similarity index 100%
rename from signatures/signed_by_billy3321.txt
rename to signatures/signed_by_billy3321.md
diff --git a/signatures/signed_by_cesar2535.txt b/signatures/signed_by_cesar2535.md
similarity index 100%
rename from signatures/signed_by_cesar2535.txt
rename to signatures/signed_by_cesar2535.md
diff --git a/signatures/signed_by_etwu.txt b/signatures/signed_by_etwu.md
similarity index 100%
rename from signatures/signed_by_etwu.txt
rename to signatures/signed_by_etwu.md
diff --git a/signatures/signed_by_narahuang.txt b/signatures/signed_by_narahuang.md
similarity index 100%
rename from signatures/signed_by_narahuang.txt
rename to signatures/signed_by_narahuang.md
diff --git a/signatures/signed_by_nelsliu9121.txt b/signatures/signed_by_nelsliu9121.md
similarity index 100%
rename from signatures/signed_by_nelsliu9121.txt
rename to signatures/signed_by_nelsliu9121.md
diff --git a/signatures/signed_by_tonyq.txt b/signatures/signed_by_tonyq.md
similarity index 100%
rename from signatures/signed_by_tonyq.txt
rename to signatures/signed_by_tonyq.md
diff --git a/signatures/signed_by_tw0517tw.txt b/signatures/signed_by_tw0517tw.md
similarity index 100%
rename from signatures/signed_by_tw0517tw.txt
rename to signatures/signed_by_tw0517tw.md
diff --git a/template.txt b/template.md
similarity index 80%
rename from template.txt
rename to template.md
index 50060cf8..7e58c264 100644
--- a/template.txt
+++ b/template.md
@@ -1,4 +1,4 @@
-#我是資訊人，我支持婚姻平權
+# 我是資訊人，我支持婚姻平權
 
 我相信，在愛之前，大家都是平等的。