diff --git a/posts/build_a_blog.md b/posts/build_a_blog.md
index 6a80533..866b067 100644
--- a/posts/build_a_blog.md
+++ b/posts/build_a_blog.md
@@ -892,7 +892,7 @@ index 52ce57b..2ea80cb 100644
  	subs = {
 ```
 
-The biggest note is that `convert()` now creates a `Markdown` instance on each call. This protects against multiple processes trying to use the same module level `md`
+The biggest note is that `convert()` now creates a `Markdown` instance on each call. This protects against multiple processes trying to use the single module level `md` instance.
 
 See <https://python-markdown.github.io/reference/#Markdown> for notes on how `Markdown.reset()` and thread safety.
 
@@ -923,7 +923,7 @@ INFO: number of *.html files 1002
 INFO: cleanup __bench files
 ```
 
-Did I accidetally duplicate output during [one of the refactors of this multithreading change][duped]? Yup!
+Did I accidentally duplicate output during [one of the refactors of this multithreading change][duped]? Yup!
 
 But now down to ~1.5s for 1000 posts 🎉