diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 1f14b8aa6..25f5b5bec 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -1,4 +1,4 @@
-  [StackOverflow]: http://stackoverflow.com/tags/sbt
+  [StackOverflow]: https://stackoverflow.com/tags/sbt
   [Setup]: http://www.scala-sbt.org/release/docs/Getting-Started/Setup
   [Issues]: https://github.com/sbt/sbt/issues
   [sbt-contrib]: https://gitter.im/sbt/sbt-contrib
diff --git a/README.md b/README.md
index 521b0edd0..ec224cf6a 100644
--- a/README.md
+++ b/README.md
@@ -7,7 +7,7 @@
   [Setup]: http://www.scala-sbt.org/release/docs/Getting-Started/Setup
   [FAQ]: http://www.scala-sbt.org/release/docs/Faq.html
   [sbt-dev]: https://groups.google.com/d/forum/sbt-dev
-  [searching]: http://stackoverflow.com/tags/sbt
+  [searching]: https://stackoverflow.com/tags/sbt
   [asking]: https://stackoverflow.com/questions/ask?tags=sbt
   [LICENSE]: LICENSE
   [sbt/io]: https://github.com/sbt/io
diff --git a/sbt/src/sbt-test/project/auto-plugins/project/Q.scala b/sbt/src/sbt-test/project/auto-plugins/project/Q.scala
index a6c407bcc..001fd1eae 100644
--- a/sbt/src/sbt-test/project/auto-plugins/project/Q.scala
+++ b/sbt/src/sbt-test/project/auto-plugins/project/Q.scala
@@ -1,4 +1,4 @@
-package sbttest // you need package http://stackoverflow.com/questions/9822008/
+package sbttest // you need package https://stackoverflow.com/questions/9822008/
 
 	import sbt._, Keys._
 	import java.util.concurrent.atomic.{AtomicInteger => AInt}
diff --git a/sbt/src/sbt-test/project/binary-plugin/changes/define/A.scala b/sbt/src/sbt-test/project/binary-plugin/changes/define/A.scala
index 2966e091c..e9654ba5d 100644
--- a/sbt/src/sbt-test/project/binary-plugin/changes/define/A.scala
+++ b/sbt/src/sbt-test/project/binary-plugin/changes/define/A.scala
@@ -1,4 +1,4 @@
-package sbttest // you need package http://stackoverflow.com/questions/9822008/
+package sbttest // you need package https://stackoverflow.com/questions/9822008/
 
 import sbt._, Keys._