add target=_blank

index.html

@@ -15,17 +15,17 @@
               tokyo
             </dt>
             <dd>
-                <a href="https://source.heropunch.io/gnu-tokyo">
+                <a href="https://source.heropunch.io/gnu-tokyo" target="_blank">
                     source
                 </a>
             </dd>
             <dd>
-                <a href="https://riot.im/app/#/room/#gnu.tokyo:matrix.heldscal.la">
+                <a href="https://riot.im/app/#/room/#gnu.tokyo:matrix.heldscal.la" target="_blank">
                     chat
                 </a>
             </dd>
             <dd>
-                <a href="https://chan.bbnet.io/b/overchan.talk.gnutokyo">
+                <a href="https://chan.bbnet.io/b/overchan.talk.gnutokyo" target="_blank">
                     discuss
                 </a>
             </dd>