diff --git a/DESCRIPTION b/DESCRIPTION
index b53d71f..d9a89d9 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -19,3 +19,4 @@ Encoding: UTF-8
 LazyData: true
 RoxygenNote: 7.1.0
 Language: en-US
+Roxygen: list(markdown = TRUE)
diff --git a/R/tinter.R b/R/tinter.R
index 2082fd4..46af02d 100644
--- a/R/tinter.R
+++ b/R/tinter.R
@@ -12,8 +12,7 @@
 #' tinter("blue")
 #' tinter("#fa6a5c", steps = 10, crop = 3)
 #' tinter("#fa6a5c", direction = "tints")
-
-tinter <- function(x, steps = 5, crop = 1, direction = "both", adjust = 0){
+tinter <- function(x, steps = 5, crop = 1, direction = "both", adjust = 0) {
   check_colour(x)
   chk_whole_number(steps)
   chk_whole_number(crop)
@@ -22,25 +21,26 @@ tinter <- function(x, steps = 5, crop = 1, direction = "both", adjust = 0){
   chk_number(adjust)
   chk_range(adjust, c(-1, 1))
 
-  if(crop > steps)
+  if (crop > steps) {
     stop("crop cannot be greater than steps.", call. = FALSE)
+  }
 
   shades <- shade(x, steps, crop)
   tints <- tint(x, steps, crop)
 
   res <- c(tints, shades[-1])
 
-  if(direction == "shades"){
+  if (direction == "shades") {
     res <- shades
   }
-  if(direction == "tints"){
+  if (direction == "tints") {
     res <- tints
   }
 
-  if(adjust == 0){
+  if (adjust == 0) {
     return(res)
   }
-  if(adjust > 0){
+  if (adjust > 0) {
     return(lighten(res, 1 - adjust))
   }
   darken(res, abs(adjust))
@@ -55,12 +55,13 @@ tinter <- function(x, steps = 5, crop = 1, direction = "both", adjust = 0){
 #' @export
 #' @examples
 #' darken(tinter("blue"), 0.2)
-
-darken <- function(x, amount){
+darken <- function(x, amount) {
   lapply(x, check_colour)
   chk_number(amount)
   chk_range(amount)
-  sapply(x, function(x){shade(x, 100, 0)[amount*100]}, USE.NAMES = FALSE)
+  sapply(x, function(x) {
+    shade(x, 100, 0)[amount * 100]
+  }, USE.NAMES = FALSE)
 }
 
 #' Lighten colour.
@@ -72,14 +73,15 @@ darken <- function(x, amount){
 #' @export
 #' @examples
 #' lighten(tinter("blue"), 0.2)
-
-lighten <- function(x, amount){
+lighten <- function(x, amount) {
   lapply(x, check_colour)
   chk_number(amount)
   chk_range(amount)
 
-  if(amount == 0){
+  if (amount == 0) {
     amount <- 0.01
   }
-  sapply(x, function(x){tint(x, 100, 0)[amount*100]}, USE.NAMES = FALSE)
+  sapply(x, function(x) {
+    tint(x, 100, 0)[amount * 100]
+  }, USE.NAMES = FALSE)
 }
diff --git a/R/utils.R b/R/utils.R
index ce65fc4..d3db3cf 100644
--- a/R/utils.R
+++ b/R/utils.R
@@ -1,23 +1,23 @@
-shade <- function(x, steps, crop){
+shade <- function(x, steps, crop) {
   shade <- rev(grDevices::colorRampPalette(c(x, "black"))(steps + 1))
-  if(crop == 0){
+  if (crop == 0) {
     return(rev(shade))
   }
   rev(shade[-(seq_len(crop))])
 }
 
-tint <- function(x, steps, crop){
+tint <- function(x, steps, crop) {
   tint <- rev(grDevices::colorRampPalette(c(x, "white"))(steps + 1))
-  if(crop == 0){
+  if (crop == 0) {
     return(tint)
   }
   tint[-(seq_len(crop))]
 }
 
-check_colour <- function(x){
+check_colour <- function(x) {
   chk_string(x)
-  res <- try(grDevices::col2rgb(x),silent = TRUE)
-  if(class(res) == "try-error")
+  res <- try(grDevices::col2rgb(x), silent = TRUE)
+  if (class(res) == "try-error") {
     stop(x, " is not a valid color", call. = FALSE)
+  }
 }
-
diff --git a/README.Rmd b/README.Rmd
index 28fa93d..44f3ac6 100644
--- a/README.Rmd
+++ b/README.Rmd
@@ -40,23 +40,28 @@ hex <- "#335CAC"
 ```
 
 ```{r colour, echo = FALSE, fig.width = 2, fig.height = 0.5}
-tinter_plot <- function(x){
+tinter_plot <- function(x) {
   grid <- c(length(x), 1)
-  width <- 0.9/(max(grid) + 1)
-  gap <- 1/(max(grid) + 1)
-  centres <- lapply(grid, function(i) gap * ((max(grid) -
-                                                i)/2 + seq_len(i)))
+  width <- 0.9 / (max(grid) + 1)
+  gap <- 1 / (max(grid) + 1)
+  centres <- lapply(grid, function(i) {
+    gap * ((max(grid) -
+      i) / 2 + seq_len(i))
+  })
   centres <- as.matrix(expand.grid(centres))
   oldPars <- graphics::par(mai = c(0, 0, 0, 0), bg = "white")
   on.exit(graphics::par(oldPars))
   devSize <- grDevices::dev.size()
-  devRatio <- devSize[2]/devSize[1]
-  graphics::plot(NA, NA, xlim = c(-0.1, 1.1), ylim = 0.5 + c(-1, 1) *
-         devRatio * 0.6, xlab = "", ylab = "", xaxt = "n", yaxt = "n",
-       bty = "n", asp = 1)
-  graphics::rect(centres[, 1] - width/2, rev(centres[, 2]) - width/2,
-       centres[, 1] + width/2, rev(centres[, 2]) + width/2,
-       col = x, border = "white", lwd = 0.2)
+  devRatio <- devSize[2] / devSize[1]
+  graphics::plot(NA, NA,
+    xlim = c(-0.1, 1.1), ylim = 0.5 + c(-1, 1) *
+      devRatio * 0.6, xlab = "", ylab = "", xaxt = "n", yaxt = "n",
+    bty = "n", asp = 1
+  )
+  graphics::rect(centres[, 1] - width / 2, rev(centres[, 2]) - width / 2,
+    centres[, 1] + width / 2, rev(centres[, 2]) + width / 2,
+    col = x, border = "white", lwd = 0.2
+  )
 }
 
 tinter_plot(hex)
diff --git a/build.R b/build.R
index c623aee..75b782d 100644
--- a/build.R
+++ b/build.R
@@ -1,11 +1,15 @@
 source("hex.R")
+
+roxygen2md::roxygen2md()
+
+styler::style_pkg(filetype = c("R", "Rmd"))
+
 devtools::test()
 devtools::document()
-knitr::knit("README.Rmd")
-if(TRUE) {
+# knitr::knit("README.Rmd")
+if(FALSE) {
   if(file.exists("DESCRIPTION")) unlink("docs", recursive = TRUE)
   pkgdown::build_site()
 }
-# need to resolve pkgdown path issue before submitting to cran for update
-
 devtools::check()
+
diff --git a/tests/testthat/test-zzz-package.R b/tests/testthat/test-zzz-package.R
index 05ff91b..799bcb3 100644
--- a/tests/testthat/test-zzz-package.R
+++ b/tests/testthat/test-zzz-package.R
@@ -20,5 +20,4 @@ test_that("package", {
 
   expect_length(darken(tinter("blue"), amount = 0.1), 9L)
   expect_length(lighten(tinter("blue"), amount = 0.1), 9L)
-
 })