diff --git a/README.md b/README.md
index 2885a29..a90ad7e 100644
--- a/README.md
+++ b/README.md
@@ -195,7 +195,7 @@ Join us on slack at [**#awesome-explorables**](https://awesome-explorables.com/)
 * [Flex - YC Research](https://harc.ycr.org/flex/) - Interactive programming and solution exploration tools
   * [Ohm](https://github.com/harc/ohm) - Visual parser generator and toolkit for building interpreters and compilers.
   * [Chorus](http://www.chorus-home.org) - Visual mobile programming using spreadsheet concepts
-* [Loopy](ncase.me/loopy/) - a tool for thinking in systems
+* [Loopy](http://ncase.me/loopy/) - a tool for thinking in systems