diff --git a/BUILDING.md b/BUILDING.md
index edaba93..a97076a 100644
--- a/BUILDING.md
+++ b/BUILDING.md
@@ -2,7 +2,7 @@
 
 #### Toolchain setup
 
-- Get apktool (use [this self-built version](//f001.backblazeb2.com/file/avepub/apktool-cli-all.jar) which is master + [this pr](https://github.com/iBotPeaches/Apktool/pull/2463)).
+- Get apktool (use [this self-built version](http://f001.backblazeb2.com/file/avepub/apktool-cli-all.jar) which is master + [this pr](https://github.com/iBotPeaches/Apktool/pull/2463)).
 - Get a keystore, see [here](https://stackoverflow.com/a/14994354/3286892), step 1.
 - Get apksigner, it's part of android build tools.
 - If you want Mutant Standard emoji patches, get 72x72 PNG copies of latest version of mutant standard emojis with codepoints. I have a zip [here](https://mutant.lavatech.top/72x72.zip).