diff --git a/site/_docs/posts.md b/site/_docs/posts.md
index 0253dbac..40aa8365 100644
--- a/site/_docs/posts.md
+++ b/site/_docs/posts.md
@@ -37,7 +37,7 @@ file. For example, the following are examples of valid post filenames:
```sh
2011-12-31-new-years-eve-is-awesome.md
-2012-09-12-how-to-write-a-blog.textile
+2012-09-12-how-to-write-a-blog.md
```
diff --git a/site/_docs/structure.md b/site/_docs/structure.md
index de077c5e..b21cb1b2 100644
--- a/site/_docs/structure.md
+++ b/site/_docs/structure.md
@@ -18,8 +18,8 @@ A basic Jekyll site usually looks something like this:
.
├── _config.yml
├── _drafts
-| ├── begin-with-the-crazy-ideas.textile
-| └── on-simplicity-in-technology.markdown
+| ├── begin-with-the-crazy-ideas.md
+| └── on-simplicity-in-technology.md
├── _includes
| ├── footer.html
| └── header.html
@@ -27,8 +27,8 @@ A basic Jekyll site usually looks something like this:
| ├── default.html
| └── post.html
├── _posts
-| ├── 2007-10-29-why-every-programmer-should-play-nethack.textile
-| └── 2009-04-26-barcamp-boston-4-roundup.textile
+| ├── 2007-10-29-why-every-programmer-should-play-nethack.md
+| └── 2009-04-26-barcamp-boston-4-roundup.md
├── _data
| └── members.yml
├── _site