diff --git a/.travis.yml b/.travis.yml
index 55de046..e85f50f 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -34,6 +34,7 @@ install:
 - Rscript -e 'install.packages("mapproj", repos = "http://cran.rstudio.com")'
 - Rscript -e 'install.packages("rgeos", repos = "http://cran.rstudio.com")'
 - Rscript -e 'install.packages("gstat", repos = "http://cran.rstudio.com")'
+- Rscript -e 'install.packages("Hmisc", repos = "http://cran.rstudio.com")'
 - Rscript -e 'install.packages("testthat", repos = "http://cran.rstudio.com")'
 - Rscript -e 'install.packages("spdep", repos = "http://cran.rstudio.com")'
 - Rscript -e 'install.packages("verification", repos = "http://cran.rstudio.com")'