diff --git a/.travis.yml b/.travis.yml
index 848ced3a..74cc2319 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -6,15 +6,15 @@ os:
 
 #language: python
 
-#addons:
-#  apt:
-#    packages:
-#      - inkscape
-#      - libav-tools
-#      - gdb
+addons:
+  apt:
+    packages:
+      - inkscape
+      - libav-tools
+      - gdb
 #      - mencoder
-#      - dvipng
-#      - libpng
+      - dvipng
+      - libpng
 #      - gfortran
 #      - libatlas-dev
 #      - libatlas-base-dev