diff --git a/.Rbuildignore b/.Rbuildignore
index 22f5e08..0287772 100755
--- a/.Rbuildignore
+++ b/.Rbuildignore
@@ -1,3 +1,4 @@
+..Rcheck
 PSAboot.dev.R
 PSAboot.Rproj
 README.md
@@ -20,4 +21,3 @@ build.R
 ^CRAN-SUBMISSION$
 README.Rmd
 Poster/
-doc/
diff --git a/R/PSAboot-package.R b/R/PSAboot-package.R
index 1fcaae6..c8469ee 100755
--- a/R/PSAboot-package.R
+++ b/R/PSAboot-package.R
@@ -27,7 +27,7 @@ NULL
 #' 
 #' Student results from the 2009 Programme of International Student Assessment (PISA)
 #' as provided by the Organization for Economic Co-operation and Development (OECD).
-#' See \url{https://www.oecd.org/pisa/} for more information including the code book.
+#' See www.oecd.org/pisa/ for more information including the code book.
 #'
 #' Note that missing values have been imputed using the 
 #' mice package. Details on the specific procedure are in the \code{pisa.impute} function
@@ -37,7 +37,6 @@ NULL
 #' @docType data
 #' @references Organisation for Economic Co-operation and Development (2009).
 #'             Programme for International Student Assessment (PISA). 
-#'             \url{https://www.oecd.org/pisa/}
 #' @format a data frame with 5,233 rows and 65 columns.
 #' \describe{
 #' \item{\code{CNT}}{Country}
@@ -106,7 +105,6 @@ NULL
 #' @docType data
 #' @references Organisation for Economic Co-operation and Development (2009).
 #'             Programme for International Student Assessment (PISA). 
-#'             \url{https://www.oecd.org/pisa/}
 #' @format a data frame with 4,622 rows and 65 columns.
 #' \describe{
 #' \item{\code{CNT}}{Country}
diff --git a/build.R b/build.R
index 6147571..9dff0ae 100755
--- a/build.R
+++ b/build.R
@@ -1,4 +1,4 @@
-require(devtools)
+0(devtools)
 
 usethis::use_tidy_description()
 devtools::document()
diff --git a/man/pisalux.Rd b/man/pisalux.Rd
index e27a6c6..8bc0504 100755
--- a/man/pisalux.Rd
+++ b/man/pisalux.Rd
@@ -70,6 +70,5 @@ in the \href{https://github.com/jbryer/pisa}{\code{pisa} package}.
 }
 \references{
 Organisation for Economic Co-operation and Development (2009).
-            Programme for International Student Assessment (PISA). 
-            \url{https://www.oecd.org/pisa/}
+            Programme for International Student Assessment (PISA).
 }
diff --git a/man/pisausa.Rd b/man/pisausa.Rd
index 6879ad7..6dfeb89 100755
--- a/man/pisausa.Rd
+++ b/man/pisausa.Rd
@@ -62,7 +62,7 @@ a data frame with 5,233 rows and 65 columns.
 \description{
 Student results from the 2009 Programme of International Student Assessment (PISA)
 as provided by the Organization for Economic Co-operation and Development (OECD).
-See \url{https://www.oecd.org/pisa/} for more information including the code book.
+See www.oecd.org/pisa/ for more information including the code book.
 }
 \details{
 Note that missing values have been imputed using the 
@@ -71,6 +71,5 @@ in the \href{https://github.com/jbryer/pisa}{\code{pisa} package}.
 }
 \references{
 Organisation for Economic Co-operation and Development (2009).
-            Programme for International Student Assessment (PISA). 
-            \url{https://www.oecd.org/pisa/}
+            Programme for International Student Assessment (PISA).
 }