diff --git a/DESCRIPTION b/DESCRIPTION
index 9e0c691..ecf406a 100755
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -13,13 +13,13 @@ Description: Provides functions for validating and normalizing bibliographic
    and provides various loadable data files such call number / subject
    crosswalks and code tables.
 License: GPL-3
-Depends: R (>= 3.5.0), data.table, utils
-Imports: curl, methods, pbapply, stringr, xml2
+Depends: R (>= 3.5.0), utils
+Imports: curl, data.table, methods, pbapply, stringr, xml2
 Suggests: assertr, testthat, knitr, magrittr, rmarkdown
 Encoding: UTF-8
-RoxygenNote: 7.2.1
 VignetteBuilder: knitr
 NeedsCompilation: no
 Packaged: 2021-05-05 13:51:08 UTC; tonyfischetti
 Author: Tony Fischetti [aut, cre]
 URL: https://github.com/NYPL/libbib
+Config/roxygen2/version: 8.0.0
diff --git a/NAMESPACE b/NAMESPACE
index b64330f..97a156a 100644
--- a/NAMESPACE
+++ b/NAMESPACE
@@ -58,6 +58,19 @@ export(worldcat_api_search)
 export(worldcat_permalink_from_isbn)
 export(worldcat_permalink_from_issn)
 export(worldcat_permalink_from_oclc_number)
-import(data.table)
 import(pbapply)
 import(utils)
+importFrom(data.table,"%chin%")
+importFrom(data.table,":=")
+importFrom(data.table,.N)
+importFrom(data.table,as.data.table)
+importFrom(data.table,copy)
+importFrom(data.table,data.table)
+importFrom(data.table,fcase)
+importFrom(data.table,fread)
+importFrom(data.table,fwrite)
+importFrom(data.table,rbindlist)
+importFrom(data.table,setattr)
+importFrom(data.table,setcolorder)
+importFrom(data.table,setindex)
+importFrom(data.table,setnames)
diff --git a/R/call-numbers-and-subject.R b/R/call-numbers-and-subject.R
index 07458d7..fb63755 100755
--- a/R/call-numbers-and-subject.R
+++ b/R/call-numbers-and-subject.R
@@ -28,7 +28,7 @@ REGEX.VALID.LCCALL.BARE <- make.valid.lccall.regex(allow.bare=TRUE)
 #' letter, or a second-level subclassification
 #' description based on the all the letters
 #'
-#' @import data.table
+#' @importFrom data.table := data.table setindex
 #'
 #' @param x A Library of Congress call number (string)
 #' @param subclassification A logical indicating whether the letters of
@@ -119,7 +119,7 @@ get_lc_call_subject_classification <- function(x, subclassification=FALSE,
 #' whether or not the input fits the canonical LC Call
 #' Number pattern
 #'
-#' @import data.table
+#' @importFrom data.table := data.table setindex
 #'
 #' @param x A Library of Congress call number (string)
 #' @param allow.bare A logical indicating whether an LC Call with only
@@ -164,7 +164,7 @@ attr(is_valid_lc_call, "assertr_vectorized") <- TRUE
 #' call number and returns the first letter if and only if
 #' the LC Call Number is valid
 #'
-#' @import data.table
+#' @importFrom data.table := data.table setindex
 #'
 #' @param x A Library of Congress call number (string)
 #' @param allow.bare A logical indicating whether an LC Call with only
@@ -209,7 +209,7 @@ get_lc_call_first_letter <- function(x, allow.bare=FALSE){
 #' call number and returns all the subject letters if and only if
 #' the LC Call Number is valid
 #'
-#' @import data.table
+#' @importFrom data.table := data.table setindex
 #' @import utils
 #'
 #' @param x A Library of Congress call number (string)
@@ -261,7 +261,7 @@ get_all_lc_call_subject_letters <- function(x, allow.bare=FALSE){
 #' This uses the hundreds place of the DDC number
 #' and returns the most general subject classification.
 #'
-#' @import data.table
+#' @importFrom data.table := data.table setindex
 #'
 #' @param x A Dewey Decimal call number
 #'
@@ -313,7 +313,7 @@ get_dewey_decimal_subject_class <- function(x){
 #' This uses the first two digits of the DDC number
 #' and returns the second most general subject classification.
 #'
-#' @import data.table
+#' @importFrom data.table := data.table setindex
 #'
 #' @param x A Dewey Decimal call number
 #'
@@ -365,7 +365,7 @@ get_dewey_decimal_subject_division <- function(x){
 #' This uses the first three digits of the DDC number
 #' and returns the third most general subject classification.
 #'
-#' @import data.table
+#' @importFrom data.table := data.table setindex
 #'
 #' @param x A Dewey Decimal call number
 #'
diff --git a/R/marc-field-deconstruction.R b/R/marc-field-deconstruction.R
index c7952da..7eacf2f 100755
--- a/R/marc-field-deconstruction.R
+++ b/R/marc-field-deconstruction.R
@@ -25,6 +25,7 @@
 #' #  3: Cartographic material Monograph/Item
 #'
 #' @export
+#' @importFrom data.table fcase
 marc_leader_get_info <- function(x){
   if(!methods::is(x, "character"))
     stop("x must be a string or NA")
diff --git a/R/other-code-translations.R b/R/other-code-translations.R
index 5d1bf28..0e1db44 100755
--- a/R/other-code-translations.R
+++ b/R/other-code-translations.R
@@ -5,7 +5,7 @@
 #' Takes a language code (defined in the Marc standards)
 #' and returns the language name.
 #'
-#' @import data.table
+#' @importFrom data.table data.table setindex
 #'
 #' @param x A language code (defined in the Marc standards) or a vector
 #'          of language codes
@@ -46,7 +46,7 @@ get_language_from_code <- function(x){
 #' Interestingly, although it's called 'country' in the Marc standard,
 #' cities, states, and other non-countries also have codes
 #'
-#' @import data.table
+#' @importFrom data.table data.table setindex
 #'
 #' @param x A country code (defined in the Marc standards) or a vector
 #'          of country codes
diff --git a/R/special-attributes.R b/R/special-attributes.R
index 8f0e666..682da92 100755
--- a/R/special-attributes.R
+++ b/R/special-attributes.R
@@ -5,7 +5,7 @@
 #' Takes an object, attribute name, and a value and sets a special
 #' libbib attribute by reference
 #'
-#' @import data.table
+#' @importFrom data.table fread fwrite setattr
 #'
 #' @param x An object to set the attribute on
 #' @param type The name of the attribute to set. \code{lb.} will be appended
@@ -35,7 +35,7 @@ set_lb_attribute <- function(x, type, value){
 #' Takes an object and a date and sets a special attribute, "lb.date"
 #' by reference
 #'
-#' @import data.table
+#' @importFrom data.table fread fwrite setattr
 #'
 #' @param x An object to set the attribute on
 #' @param value Either a value of class \code{Date} or a string in ISO 8601
@@ -66,7 +66,7 @@ set_lb_date <- function(x, value){
 #' (attributes beginning with \code{lb.}) from the first object
 #' to the second, by reference.
 #'
-#' @import data.table
+#' @importFrom data.table fread fwrite setattr
 #'
 #' @param a The first object (the one with the attributes to copy)
 #' @param b The second object (the one to copy those attributes to)
@@ -162,7 +162,7 @@ fread_plus_helper <- function(fname){
 #' \code{allow.fallback.date} is \code{TRUE}, then the \code{lb.date}
 #' attribute is set to the current date.
 #'
-#' @import data.table
+#' @importFrom data.table fread fwrite setattr
 #'
 #' @param fname The file name to read
 #' @param allow.fallback.date A logical indicating whether, if no
@@ -243,7 +243,7 @@ fread_plus_date <- function(fname, allow.fallback.date=TRUE, ...){
 #' the base file name (after any directories) with the exception of
 #' the file extension.
 #'
-#' @import data.table
+#' @importFrom data.table fread fwrite setattr
 #'
 #' @param DT a \code{data.table} to write to disk
 #' @param fname The file name to write the \code{data.table} to. The
diff --git a/R/split-map-filter-reduce.R b/R/split-map-filter-reduce.R
index 4ed9474..772fa1c 100755
--- a/R/split-map-filter-reduce.R
+++ b/R/split-map-filter-reduce.R
@@ -16,6 +16,7 @@
 #' @seealso \code{\link{split_map_filter_reduce}}
 #'
 #' @examples
+#' library(data.table)
 #' car(c(8, 6, 7, 5, 3, 0, 9))      # 8
 #' mt <- as.data.table(mtcars)
 #' dt_del_cols(mt, "cyl", "disp", "hp")
diff --git a/R/the-web.R b/R/the-web.R
index fc8a967..3af825b 100755
--- a/R/the-web.R
+++ b/R/the-web.R
@@ -33,6 +33,7 @@
 #' # "https://lccn.loc.gov/73167510/marcxml"
 #'
 #' @export
+#' @importFrom data.table fcase
 loc_permalink_from_lccn <- function(x, normalize=TRUE, format=""){
   if(all(is.na(x))) return(as.character(x))
   if(!methods::is(x, "character"))
diff --git a/R/utilities.R b/R/utilities.R
index 2a08bbe..d761264 100755
--- a/R/utilities.R
+++ b/R/utilities.R
@@ -9,7 +9,7 @@
 #' Takes a data.table and a quoted sequence of column names
 #' and removes the specified column names from the data.table
 #'
-#' @import data.table
+#' @importFrom data.table := %chin% .N as.data.table copy data.table setnames
 #'
 #' @param DT A data.table
 #' @param ... arbitrary number of column names in quotes
@@ -17,6 +17,7 @@
 #' @return Returns data.table with those columns removed
 #'
 #' @examples
+#' library(data.table)
 #' mt <- as.data.table(mtcars)
 #' dt_del_cols(mt, "cyl", "disp", "hp")
 #'
@@ -36,7 +37,7 @@ dt_del_cols <- function(DT, ...){
 #' Takes a data.table and a quoted sequence of column names
 #' and removes all columns but the ones specified
 #'
-#' @import data.table
+#' @importFrom data.table := %chin% .N as.data.table copy data.table setnames
 #'
 #' @param DT A data.table
 #' @param ... arbitrary number of column names in quotes
@@ -44,6 +45,7 @@ dt_del_cols <- function(DT, ...){
 #' @return Returns data.table with only those columns
 #'
 #' @examples
+#' library(data.table)
 #' mt <- as.data.table(mtcars)
 #' dt_keep_cols(mt, "mpg", "am", "gear", "carb")
 #'
@@ -119,7 +121,7 @@ dt_pivot <- function(DT, theby, theexp, percent.cutoff=0, value.name="value",
 #' The quoted group-by variable must be a character or factor. If it is
 #' not, it will be temporarily converted into one and a warning is issued.
 #'
-#' @import data.table
+#' @importFrom data.table := %chin% .N as.data.table copy data.table setnames
 #'
 #' @param DT The data.table object to operate on
 #' @param group_by_this A quoted column to group by
@@ -137,6 +139,7 @@ dt_pivot <- function(DT, theby, theexp, percent.cutoff=0, value.name="value",
 #'         percent column (out of 100) to two decimal places
 #'
 #' @examples
+#' library(data.table)
 #'
 #' iris_dt <- as.data.table(iris)
 #' dt_counts_and_percents(iris_dt, "Species")
@@ -231,7 +234,7 @@ get_clean_names <- function(dat, lower=TRUE){
 #' All space/whitespace characters are replaced with underscores,
 #' as are all characters not from A-Z, a-z, an underscore, or a digit
 #'
-#' @import data.table
+#' @importFrom data.table := %chin% .N as.data.table copy data.table setnames
 #'
 #' @param DT a data.table
 #' @param lower A logical indicating whether all column names should be
@@ -242,6 +245,7 @@ get_clean_names <- function(dat, lower=TRUE){
 #' @seealso \code{\link{get_clean_names}}
 #'
 #' @examples
+#' library(data.table)
 #'
 #' ejemplo <- as.data.table(iris)
 #' setnames(ejemplo, c("Sepal Length", "Sepal@Width", "Petal	Length",
@@ -265,7 +269,7 @@ dt_set_clean_names <- function(DT, lower=TRUE){
 #' NA.
 #' The percent is out of 100 and contains up to two decimal places
 #'
-#' @import data.table
+#' @importFrom data.table := %chin% .N as.data.table copy data.table setnames
 #'
 #' @param DT A data.table object
 #' @param acolumn a quoted column name
@@ -275,6 +279,7 @@ dt_set_clean_names <- function(DT, lower=TRUE){
 #' @seealso \code{\link{is.na}}
 #'
 #' @examples
+#' library(data.table)
 #'
 #' mt <- as.data.table(mtcars)
 #' mt[mpg<16, mpg:=NA]
@@ -303,7 +308,7 @@ dt_percent_not_na <- function(DT, acolumn){
 #'
 #' The quoted group-by variable must be a character or factor
 #'
-#' @import data.table
+#' @importFrom data.table := %chin% .N as.data.table copy data.table setnames
 #'
 #' @param DT The data.table object to operate on
 #' @param acolumn a quoted column name
@@ -317,6 +322,7 @@ dt_percent_not_na <- function(DT, acolumn){
 #'         percent column (out of 100) to two decimal places
 #'
 #' @examples
+#' library(data.table)
 #'
 #' iris_dt <- as.data.table(iris)
 #' iris_dt[sample(1:.N, 10), Species:=NA_character_]
@@ -347,7 +353,7 @@ dt_na_breakdown <- function(DT, acolumn, big.mark=FALSE){
 #' be added to end of the each column's name. If \code{prefix}
 #' is \code{TRUE}, the string is added to the beginning, instead.
 #'
-#' @import data.table
+#' @importFrom data.table := %chin% .N as.data.table copy data.table setnames
 #'
 #' @param DT A data.table
 #' @param astring A string to add to each column name
@@ -372,6 +378,7 @@ dt_na_breakdown <- function(DT, acolumn, big.mark=FALSE){
 #'         column names.
 #'
 #' @examples
+#' library(data.table)
 #' DT <- as.data.table(iris)
 #'
 #' dt_add_to_col_names(DT, "_post")
diff --git a/R/worldcat-api.R b/R/worldcat-api.R
index bb8de24..06cd591 100755
--- a/R/worldcat-api.R
+++ b/R/worldcat-api.R
@@ -1069,6 +1069,7 @@ worldcat_api_search_helper <- function(sru, max_records=100,
 #'
 #' }
 #' @export
+#' @importFrom data.table fcase rbindlist setcolorder
 worldcat_api_search <- function(sru, max_records=10,
                                 sru_query_assist=getOption("libbib.sru_query_assist", TRUE),
                                 frbrGrouping="on", start_at=1,
diff --git a/man/car.Rd b/man/car.Rd
index 7339703..4db84e7 100644
--- a/man/car.Rd
+++ b/man/car.Rd
@@ -20,6 +20,7 @@ Equivalent to Lisp's \code{car} function
 Originally for use as a reduction function in \code{split_map_filter_reduce}
 }
 \examples{
+library(data.table)
 car(c(8, 6, 7, 5, 3, 0, 9))      # 8
 mt <- as.data.table(mtcars)
 dt_del_cols(mt, "cyl", "disp", "hp")
diff --git a/man/dt_add_to_col_names.Rd b/man/dt_add_to_col_names.Rd
index 15abd4e..85e6903 100644
--- a/man/dt_add_to_col_names.Rd
+++ b/man/dt_add_to_col_names.Rd
@@ -48,6 +48,7 @@ be added to end of the each column's name. If \code{prefix}
 is \code{TRUE}, the string is added to the beginning, instead.
 }
 \examples{
+library(data.table)
 DT <- as.data.table(iris)
 
 dt_add_to_col_names(DT, "_post")
diff --git a/man/dt_counts_and_percents.Rd b/man/dt_counts_and_percents.Rd
index ad48523..1e9bcbb 100644
--- a/man/dt_counts_and_percents.Rd
+++ b/man/dt_counts_and_percents.Rd
@@ -43,6 +43,7 @@ The quoted group-by variable must be a character or factor. If it is
 not, it will be temporarily converted into one and a warning is issued.
 }
 \examples{
+library(data.table)
 
 iris_dt <- as.data.table(iris)
 dt_counts_and_percents(iris_dt, "Species")
diff --git a/man/dt_del_cols.Rd b/man/dt_del_cols.Rd
index 8b6b04b..96ccc19 100644
--- a/man/dt_del_cols.Rd
+++ b/man/dt_del_cols.Rd
@@ -19,6 +19,7 @@ Takes a data.table and a quoted sequence of column names
 and removes the specified column names from the data.table
 }
 \examples{
+library(data.table)
 mt <- as.data.table(mtcars)
 dt_del_cols(mt, "cyl", "disp", "hp")
 
diff --git a/man/dt_keep_cols.Rd b/man/dt_keep_cols.Rd
index 870e310..642dd4f 100644
--- a/man/dt_keep_cols.Rd
+++ b/man/dt_keep_cols.Rd
@@ -19,6 +19,7 @@ Takes a data.table and a quoted sequence of column names
 and removes all columns but the ones specified
 }
 \examples{
+library(data.table)
 mt <- as.data.table(mtcars)
 dt_keep_cols(mt, "mpg", "am", "gear", "carb")
 
diff --git a/man/dt_na_breakdown.Rd b/man/dt_na_breakdown.Rd
index c276592..928d3fb 100644
--- a/man/dt_na_breakdown.Rd
+++ b/man/dt_na_breakdown.Rd
@@ -34,6 +34,7 @@ The final row is a total count
 The quoted group-by variable must be a character or factor
 }
 \examples{
+library(data.table)
 
 iris_dt <- as.data.table(iris)
 iris_dt[sample(1:.N, 10), Species:=NA_character_]
diff --git a/man/dt_percent_not_na.Rd b/man/dt_percent_not_na.Rd
index 1614e6e..02727b7 100644
--- a/man/dt_percent_not_na.Rd
+++ b/man/dt_percent_not_na.Rd
@@ -21,6 +21,7 @@ NA.
 The percent is out of 100 and contains up to two decimal places
 }
 \examples{
+library(data.table)
 
 mt <- as.data.table(mtcars)
 mt[mpg<16, mpg:=NA]
diff --git a/man/dt_set_clean_names.Rd b/man/dt_set_clean_names.Rd
index 90bf9e5..25883a9 100644
--- a/man/dt_set_clean_names.Rd
+++ b/man/dt_set_clean_names.Rd
@@ -25,6 +25,7 @@ All space/whitespace characters are replaced with underscores,
 as are all characters not from A-Z, a-z, an underscore, or a digit
 }
 \examples{
+library(data.table)
 
 ejemplo <- as.data.table(iris)
 setnames(ejemplo, c("Sepal Length", "Sepal@Width", "Petal	Length",
diff --git a/man/split_map_filter_reduce.Rd b/man/split_map_filter_reduce.Rd
index 070492a..9c4c583 100644
--- a/man/split_map_filter_reduce.Rd
+++ b/man/split_map_filter_reduce.Rd
@@ -53,7 +53,7 @@ Returns a vector
 }
 \description{
 This function takes a vector of strings, splits those strings
-on a particular character; string; or regex patters, applies a
+on a particular character; string; or regex pattern, applies a
 user-specified function to each sub-element of the now split element,
 filters those sub-elements using a user-specified function, and, finally,
 recombines each element's sub-elements using a user specified reduction