diff --git a/.travis.yml b/.travis.yml
index f0e7f4c..bd5c04f 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,10 +1,19 @@
 # R for travis: see documentation at https://docs.travis-ci.com/user/languages/r
 
 language: R
-sudo: false
 cache: packages
-after_success:
-  - Rscript -e 'covr::codecov()'
-warnings_are_errors: true
-notifications:
-  slack: forestgeo:WtWMP7g7JbJsbPJOvBb3tTTn
+
+matrix:
+  include:
+  - r: devel
+  - r: release
+    after_success: Rscript -e 'covr::coveralls()'
+    before_deploy: Rscript -e 'remotes::install_cran("pkgdown")'
+    deploy:
+      provider: script
+      script: Rscript -e 'pkgdown::deploy_site_github()'
+      skip_cleanup: true
+  - r: oldrel
+  - r: 3.3
+  - r: 3.2
+  - r: 3.1
diff --git a/DESCRIPTION b/DESCRIPTION
index a502be3..08c1f32 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -121,3 +121,5 @@ Language: en-US
 LazyData: true
 Roxygen: list(markdown = TRUE)
 RoxygenNote: 6.1.1
+Depends: 
+    R (>= 3.1)
diff --git a/cran-comments.md b/cran-comments.md
index cde89ce..3039bc7 100644
--- a/cran-comments.md
+++ b/cran-comments.md
@@ -1,15 +1,16 @@
 ## Test environments
 
-* local windows 10 x64, R 3.5.2
-* ubuntu 14.04 (on travis-ci), R 3.5.1
-* win-builder (devel and release)
+* local: mingw32-3.5.2
+* travis: 3.1, 3.2, 3.3, oldrel, release, devel
+* r-hub: windows-x86_64-devel, ubuntu-gcc-release, fedora-clang-devel
+* win-builder: windows-x86_64-devel
 
 ## R CMD check results
 
 using R version 3.4.4 (2018-03-15)
 using platform: x86_64-pc-linux-gnu (64-bit)
-using option ‘--as-cran’
-this is package ‘fgeo’ version ‘1.1.1.9000’
+using option ‘--as-cran’
+this is package ‘fgeo’ version ‘1.1.1.9000’
 
 Status: 2 NOTEs
 * NOTE 1 raises if the package is built using R v3.5. (<https://ropensci.github.io/dev_guide/building.html#authorship>).