diff --git a/.travis.yml b/.travis.yml
index 01bad41..bda8dff 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -8,12 +8,13 @@ git:
 repos:
   CRAN: https://cloud.r-project.org
 r_packages:
+  - devtools
   - httr
   - jsonlite
-  - testthat
-  - optparse
   - knitr
+  - optparse
   - roxygen2
+  - testthat
 after_install:
   - cd rosetteApi
 warnings_are_errors: true
diff --git a/examples/similar_terms.R b/examples/similar_terms.R
index 683a1f0..1441f9c 100644
--- a/examples/similar_terms.R
+++ b/examples/similar_terms.R
@@ -1,7 +1,6 @@
 source("../R/Api.R")
-library(hash)
 library(jsonlite)
-library("optparse")
+library(optparse)
 
 option_list = list( make_option(c("-k", "--key"), action="store", default=NA, type='character',
               help="Rosette API key"), make_option(c("-u", "--url"), action="store", default=NA, type='character',
@@ -10,7 +9,7 @@ opt_parser = OptionParser(option_list=option_list)
 opt = parse_args(opt_parser)
 
 similar_terms_data <- "spy"
-opts <- hash()
+opts <- list()
 opts[["resultLanguages"]] <- list("deu", "spa", "jpn")
 
 parameters <- list()
@@ -23,4 +22,4 @@ if (is.na(opt$url)){
    result <- api(opt$key, "semantics/similar", parameters, NULL, NULL, opt$url)
 }
 print(jsonlite::toJSON(result$header, pretty = TRUE))
-print(jsonlite::toJSON(result$content, pretty = TRUE))
\ No newline at end of file
+print(jsonlite::toJSON(result$content, pretty = TRUE))