diff --git a/TD6-format.md b/TD6-format.md
index cdd92aa..1a55c33 100644
--- a/TD6-format.md
+++ b/TD6-format.md
@@ -1,14 +1,11 @@
 # TD6 files
-
 The TD6 file format is well documented in the [Tycoon Technical Depot][td6]. 
 
 ### Checksums
-
 TD6 files are stored using the Run Length Encoding format described in Tycoon Technical Depot. The checksum uses the same format as described [here][checksum].
 
- [td6]: http://freerct.github.io/RCTTechDepot-Archive/TD6.html
- [checksum]: http://freerct.github.io/RCTTechDepot-Archive/checksum.html
+ [td6]: https://freerct.github.io/RCTTechDepot-Archive/TD6.html
+ [checksum]: https://freerct.github.io/RCTTechDepot-Archive/checksum.html
 
 #### Run-Length Encoding Implementations
-
-There is a Go implementation of the run length encoding format available here: http://godoc.org/github.com/kevinburke/rct/rle
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+There is a Go implementation of the run length encoding format available here: https://godoc.org/github.com/kevinburke/rct/rle
\ No newline at end of file