diff --git a/install.ls b/install.ls
index 9ca9e53..f2bf7eb 100644
--- a/install.ls
+++ b/install.ls
@@ -3,9 +3,9 @@ require! {
 }
 
 bin-url = switch process.platform
-  | \darwin => 'http://kindlegen.s3.amazonaws.com/KindleGen_Mac_i386_v2_9.zip'
-  | \linux => 'http://kindlegen.s3.amazonaws.com/kindlegen_linux_2.6_i386_v2_9.tar.gz'
-  | \win32 => 'http://kindlegen.s3.amazonaws.com/kindlegen_win32_v2_9.zip'
+  | \darwin => 'https://kindlegen.s3.amazonaws.com/KindleGen_Mac_i386_v2_9.zip'
+  | \linux => 'https://kindlegen.s3.amazonaws.com/kindlegen_linux_2.6_i386_v2_9.tar.gz'
+  | \win32 => 'https://kindlegen.s3.amazonaws.com/kindlegen_win32_v2_9.zip'
   | otherwise => throw new Error 'Unsupported platform'
 
 download bin-url, \bin, {+extract} .then -> console.log 'Download completed'