1 files changed, 3 insertions, 0 deletions
diff --git a/.travis.yml b/.travis.yml
index b95b165..a1bda6a 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,8 +1,11 @@
 addons:
   apt:
+    sources:
+    - ubuntu-toolchain-r-test
     packages:
     - libtomcrypt-dev
     - libtommath-dev
+    - gcc-6
 language: java
 jdk:
 - oraclejdk8