diff --git a/docs/src/intro.md b/docs/src/intro.md
index c7769505..de74a9c0 100644
--- a/docs/src/intro.md
+++ b/docs/src/intro.md
@@ -7,10 +7,10 @@ the same class (user, admin_user, and so on), including factory inheritance.
 
 Its documentation is split as such:
 
-- the [guide](setup/summary.html) is a great place to start for first-time users.
-- the [cookbook](cookbook/has_many-associations.html) is the go-to place for creative solutions to common situations.
+- the [guide](setup/summary.md) is a great place to start for first-time users.
+- the [cookbook](cookbook/has_many-associations.md) is the go-to place for creative solutions to common situations.
 - the [wiki](https://github.com/thoughtbot/factory_bot/wiki) details considerations for integrating with other software.
-- the [reference](ref/build-strategies.html) is terse facts for those who use this project often.
+- the [reference](ref/build-strategies.md) is terse facts for those who use this project often.
 
 ## License