diff --git a/DESCRIPTION b/DESCRIPTION
index 7df9745b5..d684c2a17 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -25,6 +25,7 @@ Imports:
     rematch2 (>= 2.0.1),
     rlang (>= 0.1.1),
     rprojroot (>= 1.1),
+    rstudioapi (>= 0.7),
     tibble (>= 1.4.2),
     tools,
     withr (>= 1.0.0),
@@ -37,7 +38,6 @@ Suggests:
     knitr,
     prettycode,
     rmarkdown,
-    rstudioapi (>= 0.7),
     testthat (>= 2.1.0)
 VignetteBuilder: 
     knitr
diff --git a/NAMESPACE b/NAMESPACE
index 67f3fcd43..621ce1505 100644
--- a/NAMESPACE
+++ b/NAMESPACE
@@ -17,6 +17,9 @@ export(tidyverse_math_token_spacing)
 export(tidyverse_reindention)
 export(tidyverse_style)
 import(tibble)
+importFrom(R.cache,clearCache)
+importFrom(R.cache,generateCache)
+importFrom(R.cache,getCachePath)
 importFrom(magrittr,"%>%")
 importFrom(magrittr,set_names)
 importFrom(purrr,as_mapper)
@@ -36,12 +39,19 @@ importFrom(purrr,partial)
 importFrom(purrr,pmap)
 importFrom(purrr,pwalk)
 importFrom(purrr,when)
+importFrom(rematch2,re_match)
 importFrom(rlang,abort)
+importFrom(rlang,arg_match)
 importFrom(rlang,is_empty)
 importFrom(rlang,is_installed)
+importFrom(rlang,is_named)
 importFrom(rlang,seq2)
 importFrom(rlang,warn)
 importFrom(rlang,with_handlers)
+importFrom(rstudioapi,getActiveDocumentContext)
+importFrom(tools,parse_Rd)
 importFrom(utils,capture.output)
+importFrom(utils,getParseData)
+importFrom(utils,head)
 importFrom(utils,tail)
 importFrom(utils,write.table)
diff --git a/R/addins.R b/R/addins.R
index 2edc83d83..3c4cb3023 100644
--- a/R/addins.R
+++ b/R/addins.R
@@ -105,8 +105,9 @@ style_selection <- function() {
   }
 }
 
+#' @importFrom rstudioapi getActiveDocumentContext
 get_rstudio_context <- function() {
-  rstudioapi::getActiveDocumentContext()
+  getActiveDocumentContext()
 }
 
 #' Asks the user to supply a style
diff --git a/R/compat-dplyr.R b/R/compat-dplyr.R
index 5bf60eec3..6896b3429 100644
--- a/R/compat-dplyr.R
+++ b/R/compat-dplyr.R
@@ -52,8 +52,9 @@ filter <- function(.data, ...) {
   subset(.data, ...)
 }
 
+#' @importFrom rlang is_named
 left_join <- function(x, y, by) {
-  if (rlang::is_named(by)) {
+  if (is_named(by)) {
     by_x <- names(by)
     by_y <- unname(by)
   } else {
diff --git a/R/io.R b/R/io.R
index 9caad1a67..d6d7d10c0 100644
--- a/R/io.R
+++ b/R/io.R
@@ -19,10 +19,10 @@ transform_utf8 <- function(path, fun, dry) {
 #'   latter returns an error if the input code is not identical to the result
 #'   of styling. "off", the default, writes back if the input and output of
 #'   styling are not identical.
-#' @importFrom rlang with_handlers warn
+#' @importFrom rlang with_handlers warn arg_match abort
 #' @keywords internal
 transform_utf8_one <- function(path, fun, dry) {
-  rlang::arg_match(dry, c("on", "off", "fail"))
+  arg_match(dry, c("on", "off", "fail"))
   with_handlers(
     {
       file_with_info <- read_utf8(path)
@@ -32,7 +32,7 @@ transform_utf8_one <- function(path, fun, dry) {
       identical <- identical_content && !file_with_info$missing_EOF_line_break
       if (!identical) {
         if (dry == "fail") {
-          rlang::abort(
+          abort(
             paste0(
               "File `", path, "` would be modified by styler and argument dry",
               " is set to 'fail'."
@@ -51,7 +51,7 @@ transform_utf8_one <- function(path, fun, dry) {
     },
     error = function(e) {
       if (inherits(e, "dryError")) {
-        rlang::abort(conditionMessage(e))
+        abort(conditionMessage(e))
       } else {
         warn(paste0("When processing ", path, ": ", conditionMessage(e)))
       }
@@ -69,8 +69,9 @@ transform_utf8_one <- function(path, fun, dry) {
 #' with this implementation.
 #' @param path A path to a file to read.
 #' @keywords internal
+#' @importFrom rlang with_handlers abort
 read_utf8 <- function(path) {
-  out <- rlang::with_handlers(
+  out <- with_handlers(
     read_utf8_bare(path),
     warning = function(w) w,
     error = function(e) e
@@ -81,7 +82,7 @@ read_utf8 <- function(path) {
       missing_EOF_line_break = FALSE
     )
   } else if (inherits(out, "error")) {
-    rlang::abort(out$message)
+    abort(out$message)
   } else if (inherits(out, "warning")) {
     list(
       text = read_utf8_bare(path, warn = FALSE),
@@ -93,7 +94,10 @@ read_utf8 <- function(path) {
 #' Drop-in replacement for `xfun::read_utf8()`, with an optional `warn`
 #' argument.
 #' @keywords internal
+#' @importFrom utils head
 read_utf8_bare <- function(con, warn = TRUE) {
+  opts <- options(encoding = "native.enc")
+  on.exit(options(opts), add = TRUE)
   x <- readLines(con, encoding = "UTF-8", warn = warn)
   i <- invalid_utf8(x)
   n <- length(i)
@@ -103,7 +107,7 @@ read_utf8_bare <- function(con, warn = TRUE) {
         "The file ", con, " is not encoded in UTF-8. ",
         "These lines contain invalid UTF-8 characters: "
       ),
-      paste(c(utils::head(i), if (n > 6) "..."), collapse = ", ")
+      paste(c(head(i), if (n > 6) "..."), collapse = ", ")
     )
   }
   x
diff --git a/R/parse.R b/R/parse.R
index ddbeedcc5..64fa62311 100644
--- a/R/parse.R
+++ b/R/parse.R
@@ -90,12 +90,13 @@ tokenize <- function(text) {
 #' @param include_text Passed to [utils::getParseData()] as `includeText`.
 #' @param ... Other arguments passed to [utils::getParseData()].
 #' @keywords internal
+#' @importFrom utils getParseData
 get_parse_data <- function(text, include_text = TRUE, ...) {
   # avoid https://bugs.r-project.org/bugzilla3/show_bug.cgi?id=16041
   parse_safely(text, keep.source = TRUE)
   parsed <- parse_safely(text, keep.source = TRUE)
   pd <- as_tibble(
-    utils::getParseData(parsed, includeText = include_text),
+    getParseData(parsed, includeText = include_text),
     .name_repair = "minimal"
   ) %>%
     add_id_and_short()
diff --git a/R/roxygen-examples-find.R b/R/roxygen-examples-find.R
index 9e7cd1a24..7fb74e522 100644
--- a/R/roxygen-examples-find.R
+++ b/R/roxygen-examples-find.R
@@ -22,7 +22,7 @@ identify_start_to_stop_of_roxygen_examples_from_text <- function(text) {
 }
 
 identify_start_to_stop_of_roxygen_examples <- function(path) {
-  content <- xfun::read_utf8(path)
+  content <- read_utf8_bare(path, warn = FALSE)
   identify_start_to_stop_of_roxygen_examples_from_text(content)
 }
 
diff --git a/R/roxygen-examples-parse.R b/R/roxygen-examples-parse.R
index 129037f86..c1c14a87e 100644
--- a/R/roxygen-examples-parse.R
+++ b/R/roxygen-examples-parse.R
@@ -14,11 +14,12 @@
 #'   "#'1+  1"
 #' ))
 #' @keywords internal
+#' @importFrom tools parse_Rd
 parse_roxygen <- function(roxygen) {
   connection <- remove_roxygen_mask(roxygen) %>%
     textConnection()
   parsed <- connection %>%
-    tools::parse_Rd(fragment = TRUE) %>%
+    parse_Rd(fragment = TRUE) %>%
     as.character(deparse = TRUE)
   is_line_break <- parsed[1] == "\n"
   close(connection)
diff --git a/R/rules-spacing.R b/R/rules-spacing.R
index cfc1ee268..6f112e817 100644
--- a/R/rules-spacing.R
+++ b/R/rules-spacing.R
@@ -292,6 +292,7 @@ set_space_between_levels <- function(pd_flat) {
 #' @param force_one Whether or not to force one space or allow multiple spaces
 #'   after the regex "^#+'*".
 #' @importFrom purrr map_chr
+#' @importFrom rematch2 re_match
 #' @keywords internal
 start_comments_with_space <- function(pd, force_one = FALSE) {
   is_comment <- is_comment(pd)
@@ -305,7 +306,7 @@ start_comments_with_space <- function(pd, force_one = FALSE) {
     return(pd)
   }
 
-  comments <- rematch2::re_match(
+  comments <- re_match(
     pd$text[is_comment],
     "^(?<prefix>#+['\\*]*)(?<space_after_prefix> *)(?<text>.*)$"
   )
diff --git a/R/style-guides.R b/R/style-guides.R
index d8e79b066..f89eb06ac 100644
--- a/R/style-guides.R
+++ b/R/style-guides.R
@@ -86,7 +86,7 @@ tidyverse_style <- function(scope = "tokens",
         style_space_around_tilde,
         strict = strict
       ),
-      spacing_around_op = purrr::partial(set_space_around_op,
+      spacing_around_op = partial(set_space_around_op,
         strict = strict
       ),
       remove_space_after_opening_paren,
@@ -140,7 +140,7 @@ tidyverse_style <- function(scope = "tokens",
           except_token_before = "COMMENT"
         )
       },
-      purrr::partial(remove_line_break_in_fun_call, strict = strict),
+      partial(remove_line_break_in_fun_call, strict = strict),
       add_line_break_after_pipe = if (strict) add_line_break_after_pipe,
       set_linebreak_after_ggplot2_plus = if (strict) set_linebreak_after_ggplot2_plus
     )
diff --git a/R/ui-caching.R b/R/ui-caching.R
index 585b0b04c..f14f1988c 100644
--- a/R/ui-caching.R
+++ b/R/ui-caching.R
@@ -12,10 +12,11 @@
 #' potentially different with different versions of styler.
 #' @param ask Whether or not to interactively ask the user again.
 #' @family cache managers
+#' @importFrom R.cache clearCache
 #' @export
 cache_clear <- function(cache_name = NULL, ask = TRUE) {
   path_cache <- cache_find_path(cache_name)
-  R.cache::clearCache(path_cache, prompt = ask)
+  clearCache(path_cache, prompt = ask)
   cache_deactivate(verbose = FALSE)
 }
 
@@ -77,9 +78,10 @@ NULL
 #'   "tabular" for a tabular summary from [base::file.info()] or "both" for
 #'   both.
 #' @family cache managers
+#' @importFrom rlang arg_match
 #' @export
 cache_info <- function(cache_name = NULL, format = "both") {
-  rlang::arg_match(format, c("tabular", "lucid", "both"))
+  arg_match(format, c("tabular", "lucid", "both"))
   path_cache <- cache_find_path(cache_name)
   files <- list.files(path_cache, full.names = TRUE)
   file_info <- file.info(files) %>%
diff --git a/R/utils-cache.R b/R/utils-cache.R
index 1c8845a54..fee5ccbed 100644
--- a/R/utils-cache.R
+++ b/R/utils-cache.R
@@ -21,11 +21,12 @@ hash_standardize <- function(text) {
 #' @param cache_dir The caching directory relative to the `.Rcache` root to
 #'   look for a cached value.
 #' @keywords internal
+#' @importFrom R.cache generateCache
 is_cached <- function(text,
                       transformers,
                       more_specs,
                       cache_dir = cache_dir_default()) {
-  R.cache::generateCache(
+  generateCache(
     key = cache_make_key(text, transformers, more_specs),
     dirs = cache_dir
   ) %>%
@@ -109,9 +110,10 @@ cache_make_key <- function(text, transformers, more_specs) {
 #' Finds the path to the cache and creates it if it does not exist.
 #' @inheritParams cache_clear
 #' @keywords internal
+#' @importFrom R.cache getCachePath
 cache_find_path <- function(cache_name = NULL) {
   cache_name <- cache_get_or_derive_name(cache_name)
-  R.cache::getCachePath(c("styler", cache_name))
+  getCachePath(c("styler", cache_name))
 }
 
 #' Check if a cache is activated
@@ -143,12 +145,13 @@ cache_is_activated <- function(cache_name = NULL) {
 #' is.
 #' @param text A character vector with one or more expressions.
 #' @inheritParams cache_write
+#' @importFrom utils getParseData
 #' @keywords internal
-cache_by_expression <- function(text,
+cache_by_expression <- function(text, 
                                 transformers,
                                 more_specs) {
   expressions <- parse(text = text, keep.source = TRUE) %>%
-    utils::getParseData(includeText = TRUE)
+    getParseData(includeText = TRUE)
   if (env_current$any_stylerignore) {
     expressions <- expressions %>%
       add_stylerignore()
@@ -164,8 +167,9 @@ cache_by_expression <- function(text,
 #'
 #' @inheritParams cache_make_key
 #' @keywords internal
+#' @importFrom R.cache generateCache
 cache_write <- function(text, transformers, more_specs) {
-  R.cache::generateCache(
+  generateCache(
     key = cache_make_key(text, transformers, more_specs),
     dirs = cache_dir_default()
   ) %>%
diff --git a/R/utils-files.R b/R/utils-files.R
index 9272bb05d..464da4b1b 100644
--- a/R/utils-files.R
+++ b/R/utils-files.R
@@ -38,10 +38,11 @@ map_filetype_to_pattern <- function(filetype) {
 #' @param ... Passed to [base::dir()].
 #' @seealso set_and_assert_arg_paths
 #' @keywords internal
+#' @importFrom purrr map
 #' @examples
 #' setdiff("./file.R", "file.R") # you want to standardize first.
 dir_without_. <- function(path, ...) {
-  purrr::map(path, dir_without_._one, ...) %>%
+  map(path, dir_without_._one, ...) %>%
     unlist()
 }
 
diff --git a/R/utils.R b/R/utils.R
index abc867000..1be0bf216 100644
--- a/R/utils.R
+++ b/R/utils.R
@@ -93,11 +93,12 @@ calls_sys <- function(sys_call, ...) {
 #' @param error_if_not_found Whether or not an error should be returned if the
 #'   option was not set.
 #' @keywords internal
+#' @importFrom rlang abort
 option_read <- function(x, default = NULL, error_if_not_found = TRUE) {
   if (x %in% names(options()) | !error_if_not_found) {
     getOption(x, default)
   } else {
-    rlang::abort(paste("R option", x, "most be set."))
+    abort(paste("R option", x, "most be set."))
   }
 }