diff --git a/.Rbuildignore b/.Rbuildignore
index 281eed7a..d8e4026b 100644
--- a/.Rbuildignore
+++ b/.Rbuildignore
@@ -14,3 +14,4 @@ travis_install.sh
 run_tests.sh
 testenv
 MNIST-data
+^appveyor\.yml$
diff --git a/DESCRIPTION b/DESCRIPTION
index 684e3b79..bb3fef7f 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -1,7 +1,7 @@
 Package: tensorflow
 Type: Package
 Title: R Interface to 'TensorFlow'
-Version: 1.10.0.9001
+Version: 1.13.1
 Authors@R: c(
   person("JJ", "Allaire", role = c("aut", "cre"), email = "jj@rstudio.com"),
   person(family = "RStudio", role = c("cph", "fnd")),
@@ -46,4 +46,4 @@ Imports:
     rstudioapi (>= 0.7)
 Roxygen: list(markdown = TRUE)
 Suggests: testthat, keras, tfestimators
-RoxygenNote: 6.1.0
+RoxygenNote: 6.1.1
diff --git a/NEWS.md b/NEWS.md
new file mode 100644
index 00000000..61431b99
--- /dev/null
+++ b/NEWS.md
@@ -0,0 +1,10 @@
+## Development version
+
+
+## TensorFlow 1.13.1 (CRAN)
+
+- added option to silence TF CPP info output
+
+- `tf_gpu_configured` function to check if GPU was correctly
+
+
diff --git a/R/generics.R b/R/generics.R
index 5d4b59ba..f0fefa68 100644
--- a/R/generics.R
+++ b/R/generics.R
@@ -288,26 +288,26 @@
 
 
 #' @export
-Re.tensorflow.tensor <- function(x) {
-  tf$real(x)
+Re.tensorflow.tensor <- function(z) {
+  tf$real(z)
 }
 
 #' @export
-Im.tensorflow.tensor <- function(x) {
-  tf$imag(x)
+Im.tensorflow.tensor <- function(z) {
+  tf$imag(z)
 }
 
 #' @export
-Conj.tensorflow.tensor <- function(x) {
-  tf$conj(x)
+Conj.tensorflow.tensor <- function(z) {
+  tf$conj(z)
 }
 
 #' @export
-Arg.tensorflow.tensor <- function(x) {
-  tf$angle(x)
+Arg.tensorflow.tensor <- function(z) {
+  tf$angle(z)
 }
 
 #' @export
-Mod.tensorflow.tensor <- function(x) {
-  tf$abs(x)
+Mod.tensorflow.tensor <- function(z) {
+  tf$abs(z)
 }
diff --git a/README.md b/README.md
index 1b1a42c8..31c0e6b5 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,7 @@
 
 ## TensorFlow for R
 
-[![Travis-CI Build Status](https://travis-ci.org/rstudio/tensorflow.svg?branch=master)](https://travis-ci.org/rstudio/tensorflow) [![CRAN\_Status\_Badge](https://www.r-pkg.org/badges/version/tensorflow)](https://cran.r-project.org/package=tensorflow) 
+[![Travis-CI Build Status](https://travis-ci.org/rstudio/tensorflow.svg?branch=master)](https://travis-ci.org/rstudio/tensorflow) [![AppVeyor Build Status](https://ci.appveyor.com/api/projects/status/github/rstudio/tensorflow?branch=master&svg=true)](https://ci.appveyor.com/project/rstudio/tensorflow) [![CRAN\_Status\_Badge](https://www.r-pkg.org/badges/version/tensorflow)](https://cran.r-project.org/package=tensorflow) 
 
 [TensorFlow™](https://www.tensorflow.org) is an open source software library for numerical computation using data flow graphs. Nodes in the graph represent mathematical operations, while the graph edges represent the multidimensional data arrays (tensors) communicated between them. The flexible architecture allows you to deploy computation to one or more CPUs or GPUs in a desktop, server, or mobile device with a single API. 
 
diff --git a/appveyor.yml b/appveyor.yml
new file mode 100644
index 00000000..eb80ae7e
--- /dev/null
+++ b/appveyor.yml
@@ -0,0 +1,51 @@
+# DO NOT CHANGE the "init" and "install" sections below
+
+environment:
+  matrix:
+    - TF_VERSION: 1.13.1
+    - TF_VERSION: 1.12.0
+
+# Download script file from GitHub
+init:
+  ps: |
+        $ErrorActionPreference = "Stop"
+        Invoke-WebRequest http://raw.github.com/krlmlr/r-appveyor/master/scripts/appveyor-tool.ps1 -OutFile "..\appveyor-tool.ps1"
+        Import-Module '..\appveyor-tool.ps1'
+
+install:
+  ps: Bootstrap
+
+cache:
+  - C:\RLibrary
+
+# Adapt as necessary starting from here
+
+build_script:
+  - C:\Miniconda3-x64\Scripts\conda create -y --name r-tensorflow tensorflow=%TF_VERSION% numpy python=3.6.8
+  - travis-tool.sh install_deps
+
+test_script:
+  - travis-tool.sh run_tests
+
+on_failure:
+  - 7z a failure.zip *.Rcheck\*
+  - appveyor PushArtifact failure.zip
+
+artifacts:
+  - path: '*.Rcheck\**\*.log'
+    name: Logs
+
+  - path: '*.Rcheck\**\*.out'
+    name: Logs
+
+  - path: '*.Rcheck\**\*.fail'
+    name: Logs
+
+  - path: '*.Rcheck\**\*.Rout'
+    name: Logs
+
+  - path: '\*_*.tar.gz'
+    name: Bits
+
+  - path: '\*_*.zip'
+    name: Bits
diff --git a/man/install_tensorflow.Rd b/man/install_tensorflow.Rd
index 751e0386..832fc248 100644
--- a/man/install_tensorflow.Rd
+++ b/man/install_tensorflow.Rd
@@ -6,8 +6,7 @@
 \usage{
 install_tensorflow(method = c("auto", "virtualenv", "conda", "system"),
   conda = "auto", version = "default", envname = "r-tensorflow",
-  extra_packages = c("keras", "tensorflow-hub"),
-  restart_session = TRUE)
+  extra_packages = NULL, restart_session = TRUE)
 }
 \arguments{
 \item{method}{Installation method. By default, "auto" automatically finds a
diff --git a/man/sub-.tensorflow.tensor.Rd b/man/sub-.tensorflow.tensor.Rd
index 69675fd2..e1d80939 100644
--- a/man/sub-.tensorflow.tensor.Rd
+++ b/man/sub-.tensorflow.tensor.Rd
@@ -28,7 +28,7 @@ sess <- tf$Session()
 
 x <- tf$constant(1:15, shape = c(3, 5))
 sess$run(x)
-# by default, numerics supplied to `...` are interperted R style
+# by default, numerics supplied to `...` are interpreted R style
 sess$run( x[,1] )# first column
 sess$run( x[1:2,] ) # first two rows
 sess$run( x[,1, drop = FALSE] )
@@ -57,7 +57,7 @@ identical(
 # tf$newaxis are valid
 sess$run( x[,, tf$newaxis] )
 
-# negative numbers are always interperted python style
+# negative numbers are always interpreted python style
 # The first time a negative number is supplied to `[`, a warning is issued
 # about the non-standard behavior.
 sess$run( x[-1,] ) # last row, with a warning
@@ -86,14 +86,14 @@ sess$run( x[, 0:10] )
 options(tensorflow.extract.style = NULL)
 
 # slicing with tensors is valid too, but note, tensors are never
-# translated and are always interperted python-style.
+# translated and are always interpreted python-style.
 # A warning is issued the first time a tensor is passed to `[`
 sess$run( x[, tf$constant(0L):tf$constant(2L)] )
 # just as in python, only scalar tensors are valid
 # https://www.tensorflow.org/api_docs/python/tf/Tensor#__getitem__
 
 # To silence the warnings about tensors being passed as-is and negative numbers
-# being interperted python-style, set
+# being interpreted python-style, set
 options(tensorflow.extract.style = 'R')
 
 # clean up from examples