diff --git a/README.md b/README.md
index 1957b9a..e8a4f1a 100644
--- a/README.md
+++ b/README.md
@@ -24,14 +24,14 @@
 </td>
 <td>
 
-<a href="http://github.com/sanderland/katrain/blob/master/README.md"><img alt="English" src="http://github.com/sanderland/katrain/blob/master/katrain/img/flags/flag-uk.png" width=50></a>
-<a href="http://translate.google.com/translate?sl=en&tl=de&u=https%3A%2F%2Fgithub.com%2Fsanderland%2Fkatrain%2Fblob%2Fmaster%2FREADME.md"><img alt="German" src="http://github.com/sanderland/katrain/blob/master/katrain/img/flags/flag-de.png" width=50></a>
-<a href="http://translate.google.com/translate?sl=en&tl=fr&u=https%3A%2F%2Fgithub.com%2Fsanderland%2Fkatrain%2Fblob%2Fmaster%2FREADME.md"><img alt="French" src="http://github.com/sanderland/katrain/blob/master/katrain/img/flags/flag-fr.png" width=50></a>
-<a href="http://translate.google.com/translate?sl=en&tl=ru&u=https%3A%2F%2Fgithub.com%2Fsanderland%2Fkatrain%2Fblob%2Fmaster%2FREADME.md"><img alt="Russian" src="http://github.com/sanderland/katrain/blob/master/katrain/img/flags/flag-ru.png" width=50></a>
+<a href="http://github.com/sanderland/katrain/blob/master/README.md"><img alt="English" src="https://github.com/sanderland/katrain/blob/master/katrain/img/flags/flag-uk.png" width=50></a>
+<a href="http://translate.google.com/translate?sl=en&tl=de&u=https%3A%2F%2Fgithub.com%2Fsanderland%2Fkatrain%2Fblob%2Fmaster%2FREADME.md"><img alt="German" src="https://github.com/sanderland/katrain/blob/master/katrain/img/flags/flag-de.png" width=50></a>
+<a href="http://translate.google.com/translate?sl=en&tl=fr&u=https%3A%2F%2Fgithub.com%2Fsanderland%2Fkatrain%2Fblob%2Fmaster%2FREADME.md"><img alt="French" src="https://github.com/sanderland/katrain/blob/master/katrain/img/flags/flag-fr.png" width=50></a>
+<a href="http://translate.google.com/translate?sl=en&tl=ru&u=https%3A%2F%2Fgithub.com%2Fsanderland%2Fkatrain%2Fblob%2Fmaster%2FREADME.md"><img alt="Russian" src="https://github.com/sanderland/katrain/blob/master/katrain/img/flags/flag-ru.png" width=50></a>
 <br/>
-<a href="http://translate.google.com/translate?sl=en&tl=zh-CN&u=https%3A%2F%2Fgithub.com%2Fsanderland%2Fkatrain%2Fblob%2Fmaster%2FREADME.md"><img alt="Chinese" src="http://github.com/sanderland/katrain/blob/master/katrain/img/flags/flag-cn.png" width=50></a>
-<a href="http://translate.google.com/translate?sl=en&tl=ko&u=https%3A%2F%2Fgithub.com%2Fsanderland%2Fkatrain%2Fblob%2Fmaster%2FREADME.md"><img alt="Korean" src="http://github.com/sanderland/katrain/blob/master/katrain/img/flags/flag-ko.png" width=50></a>
-<a href="http://translate.google.com/translate?sl=en&tl=ja&u=https%3A%2F%2Fgithub.com%2Fsanderland%2Fkatrain%2Fblob%2Fmaster%2FREADME.md"><img alt="Japanese" src="http://github.com/sanderland/katrain/blob/master/katrain/img/flags/flag-jp.png" width=50></a>
+<a href="http://translate.google.com/translate?sl=en&tl=zh-CN&u=https%3A%2F%2Fgithub.com%2Fsanderland%2Fkatrain%2Fblob%2Fmaster%2FREADME.md"><img alt="Chinese" src="https://github.com/sanderland/katrain/blob/master/katrain/img/flags/flag-cn.png" width=50></a>
+<a href="http://translate.google.com/translate?sl=en&tl=ko&u=https%3A%2F%2Fgithub.com%2Fsanderland%2Fkatrain%2Fblob%2Fmaster%2FREADME.md"><img alt="Korean" src="https://github.com/sanderland/katrain/blob/master/katrain/img/flags/flag-ko.png" width=50></a>
+<a href="http://translate.google.com/translate?sl=en&tl=ja&u=https%3A%2F%2Fgithub.com%2Fsanderland%2Fkatrain%2Fblob%2Fmaster%2FREADME.md"><img alt="Japanese" src="https://github.com/sanderland/katrain/blob/master/katrain/img/flags/flag-jp.png" width=50></a>
 
 </td>
 </table>