diff --git a/README-concurrent.ja.markdown b/README-concurrent.ja.markdown
index 9bc84c4..50db433 100644
--- a/README-concurrent.ja.markdown
+++ b/README-concurrent.ja.markdown
@@ -10,8 +10,8 @@ deferred.el と concurrent.elをload-pathに置いてください。
 
 インストール実行:
 
-    (auto-install-from-url https://github.com/kiwanami/emacs-deferred/raw/master/deferred.el")
-    (auto-install-from-url https://github.com/kiwanami/emacs-deferred/raw/master/concurrent.el")
+    (auto-install-from-url "https://github.com/kiwanami/emacs-deferred/raw/master/deferred.el")
+    (auto-install-from-url "https://github.com/kiwanami/emacs-deferred/raw/master/concurrent.el")
 
 
 ## 使い方例 ##
diff --git a/README-concurrent.markdown b/README-concurrent.markdown
index 5604c00..9d1ffe1 100644
--- a/README-concurrent.markdown
+++ b/README-concurrent.markdown
@@ -14,8 +14,8 @@ If you have [auto-install.el](http://www.emacswiki.org/emacs/auto-install.el "au
 
 Install by auto-install:
 
-    (auto-install-from-url https://github.com/kiwanami/emacs-deferred/raw/master/deferred.el")
-    (auto-install-from-url https://github.com/kiwanami/emacs-deferred/raw/master/concurrent.el")
+    (auto-install-from-url "https://github.com/kiwanami/emacs-deferred/raw/master/deferred.el")
+    (auto-install-from-url "https://github.com/kiwanami/emacs-deferred/raw/master/concurrent.el")
 
 
 ## Sample codes ##
diff --git a/README.ja.markdown b/README.ja.markdown
index fe9feb3..5938cc4 100644
--- a/README.ja.markdown
+++ b/README.ja.markdown
@@ -14,7 +14,7 @@ deferred.elをload-pathに置いてください。
 
 インストール実行:
 
-    (auto-install-from-url https://github.com/kiwanami/emacs-deferred/raw/master/deferred.el")
+    (auto-install-from-url "https://github.com/kiwanami/emacs-deferred/raw/master/deferred.el")
 
 
 ## 使い方例 ##
diff --git a/README.markdown b/README.markdown
index 38b7943..7056f51 100644
--- a/README.markdown
+++ b/README.markdown
@@ -14,7 +14,7 @@ If you have [auto-install.el](http://www.emacswiki.org/emacs/auto-install.el "au
 
 Install by auto-install:
 
-    (auto-install-from-url https://github.com/kiwanami/emacs-deferred/raw/master/deferred.el")
+    (auto-install-from-url "https://github.com/kiwanami/emacs-deferred/raw/master/deferred.el")
 
 
 ## Sample codes ##