1 files changed, 1 insertions, 0 deletions
diff --git a/.travis.yml b/.travis.yml
index 63867c2..e1591a8 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -18,6 +18,7 @@ addons: &addons
       - texlive-science
       - texlive-pictures
       - latex-xcolor
+      - pgf
       - dvipng
       - cm-super
 script: