diff --git a/NAMESPACE b/NAMESPACE
index 48b1a5ac..c15d7855 100644
--- a/NAMESPACE
+++ b/NAMESPACE
@@ -18,8 +18,13 @@ S3method(select,vitae_preserve)
 S3method(slice,vitae_preserve)
 S3method(summarise,vitae_preserve)
 S3method(transmute,vitae_preserve)
+S3method(vec_cast.character,csl_date)
+S3method(vec_cast.character,csl_name)
+S3method(vec_cast.double,csl_date)
 S3method(vec_proxy_order,csl_date)
 S3method(vec_proxy_order,csl_name)
+S3method(vec_ptype2,csl_date.double)
+S3method(vec_ptype2.double,csl_date)
 S3method(vec_ptype_abbr,csl_date)
 S3method(vec_ptype_abbr,csl_name)
 S3method(xtfrm,csl_date)
@@ -46,12 +51,8 @@ export(slice)
 export(summarise)
 export(transmute)
 export(twentyseconds)
-export(vec_cast.character.csl_date)
-export(vec_cast.character.csl_name)
-export(vec_cast.double.csl_date)
-export(vec_ptype2.csl_date.double)
-export(vec_ptype2.double.csl_date)
 import(glue)
+import(vctrs)
 importFrom(dplyr,"%>%")
 importFrom(dplyr,arrange)
 importFrom(dplyr,distinct)
diff --git a/R/csl_types.R b/R/csl_types.R
index 4946af21..c8d15c69 100644
--- a/R/csl_types.R
+++ b/R/csl_types.R
@@ -44,6 +44,7 @@ format.csl_name <- function(x, ...) {
 #' @export
 vec_ptype_abbr.csl_name <- function(x) "csl name"
 
+#' @method vec_cast.character csl_name
 #' @export
 vec_cast.character.csl_name <- function(x, to, ...) {
   format(x)
@@ -97,13 +98,16 @@ vec_ptype_abbr.csl_date <- function(x) "csl_date"
 vec_ptype2.csl_date.double <- function(x, y, ...) {
   double()
 }
+#' @method vec_ptype2.double csl_date
 #' @export
 vec_ptype2.double.csl_date <- vec_ptype2.csl_date.double
 
+#' @method vec_cast.double csl_date
 #' @export
 vec_cast.double.csl_date <- function(x, to, ...) {
   vapply(x, function(x) if(is.null(x)) NA_real_ else x[[1]][[1]], numeric(1L))
 }
+#' @method vec_cast.character csl_date
 #' @export
 vec_cast.character.csl_date <- function(x, to, ...) {
   format(x)
diff --git a/R/vitae-package.R b/R/vitae-package.R
index 0cc9debe..a5db75f8 100644
--- a/R/vitae-package.R
+++ b/R/vitae-package.R
@@ -1,2 +1,6 @@
 #' @keywords internal
 "_PACKAGE"
+
+
+#' @import vctrs
+NULL