diff --git a/.Rbuildignore b/.Rbuildignore
index 5219fdf..c7d1c3e 100644
--- a/.Rbuildignore
+++ b/.Rbuildignore
@@ -1,3 +1,5 @@
 ^.*\.Rproj$
 ^.*\.Rproj\.user$
 ^\.Rproj\.user$
+^images$
+^\.travis\.yml$
diff --git a/.travis.yml b/.travis.yml
index 4f65ce0..2d9e173 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,13 +1,5 @@
-language: r
-sudo: true
+# R for travis: see documentation at https://docs.travis-ci.com/user/languages/r
+
+language: R
 cache: packages
 pandoc_version: 2.3.1
-dist: trusty
-
-before_install:
-  - sudo add-apt-repository ppa:ubuntugis/ubuntugis-unstable --yes
-  - sudo apt-get --yes --force-yes update -qq
-  - sudo apt-get install -y libudunits2-dev libproj-dev libgeos++-dev libgdal-dev libv8-dev
-
-compiler:
-  - clang
diff --git a/DESCRIPTION b/DESCRIPTION
index a6f6138..6fe178c 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -1,23 +1,28 @@
 Package: posterdown
-Author: Brent Thorne
-Title: Generate PDF conference posters using R Markdown
-Version: 0.1.2
-Description: Posterdown expands on RMarkdown to generate PDF conference posters
-Authors@R: c(
-    person("Brent", "Thorne",
-           email = "brent.thorne18@gmail.com", 
-           role = c("aut", "cre"), 
-           comment = c(ORCID = "0000-0002-1099-3857")
-    ),
-    person("Peter", "Higgins", role = "ctb"),
-    person("Shea", "Connell", role = "ctb")
-  )
-Maintainer: Brent Thorne <brent.thorne18@gmail.com>
+Title: Generate PDF Conference Posters Using R Markdown
+Version: 0.1.2.9000
+Authors@R: 
+    c(person(given = "Brent",
+             family = "Thorne",
+             role = c("aut", "cre"),
+             email = "brent.thorne18@gmail.com",
+             comment = c(ORCID = "0000-0002-1099-3857")),
+      person(given = "Peter",
+             family = "Higgins",
+             role = "ctb"),
+      person(given = "Shea",
+             family = "Connell",
+             role = "ctb"))
+Description: Posterdown expands on RMarkdown to generate
+    PDF and HTML conference posters.
 License: MIT + file LICENSE
-Encoding: UTF-8
-LazyData: true
 URL: https://github.com/brentthorne/posterdown
 BugReports: https://github.com/brentthorne/posterdown/issues
-Imports: bookdown, ggplot2, pagedown, kableExtra, Cairo, rmarkdown, knitr, yaml, ggspatial
-SystemRequirements: GNU make, Pandoc (>= 2.2.3)
+Imports: 
+    knitr,
+    pagedown,
+    rmarkdown,
+    yaml
+Encoding: UTF-8
+LazyData: true
 RoxygenNote: 6.1.1
diff --git a/NAMESPACE b/NAMESPACE
index 2f7ae9c..4391252 100644
--- a/NAMESPACE
+++ b/NAMESPACE
@@ -5,8 +5,3 @@
 export(posterdown_html)
 export(posterdown_latex)
 export(posterdown_pdf)
-import(bookdown)
-import(ggplot2)
-import(knitr)
-import(pagedown)
-import(rmarkdown)
diff --git a/R/posterdown.R b/R/posterdown.R
index c23ea6c..de6fd42 100644
--- a/R/posterdown.R
+++ b/R/posterdown.R
@@ -11,9 +11,4 @@
 #'
 #' @docType package
 #' @name posterdown
-#' @import rmarkdown
-#' @import bookdown
-#' @import pagedown
-#' @import ggplot2
-#' @import knitr
 NULL