From 649a59e2e65722e97ab9acf1355e32a55ab8c836 Mon Sep 17 00:00:00 2001
From: Kosuke Imai <kimai@princeton.edu>
Date: Wed, 22 Feb 2017 21:21:14 -0500
Subject: [PATCH] Update .travis.yml

---
 .travis.yml | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/.travis.yml b/.travis.yml
index 8b2e0ffe..81eb5690 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,6 +1,12 @@
 language: r
 cache: packages
 
+addons:
+  apt:
+    packages:
+    - tcl8.5-dev
+    - tk8.5-dev
+
 notifications:
   email:
     on_success: change