diff --git a/.travis.yml b/.travis.yml
index 252615f0b1d24c780a2364aa4b8c710e806a0a81..532d7955087a429cd9bd9442ac9b03f19257eaf9 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -15,9 +15,9 @@ addons:
       - libgsl-dev # dependency for gsl>copula>zinbwave
 
 install: skip
-before_install:
-  r_packages:
-    - knitr
+#before_install:
+#  r_packages:
+#    - knitr
 #install:
 #  - R -e 'install.packages("devtools")'
 #  - R -e 'devtools::install(dependencies = TRUE, upgrade_dependencies = TRUE)'