diff --git a/.github/workflows/R-CMD-check.yaml b/.github/workflows/R-CMD-check.yaml
index a3ac61827..50c48b234 100644
--- a/.github/workflows/R-CMD-check.yaml
+++ b/.github/workflows/R-CMD-check.yaml
@@ -41,7 +41,8 @@ jobs:
 
       - uses: r-lib/actions/setup-r-dependencies@v2
         with:
-          extra-packages: any::rcmdcheck
+          extra-packages: any::rcmdcheck, Matrix
+          pak-version: devel
           needs: check
 
       - uses: r-lib/actions/check-r-package@v2
diff --git a/R/ampute.continuous.R b/R/ampute.continuous.R
index 5ae5b7cad..130af4b7a 100644
--- a/R/ampute.continuous.R
+++ b/R/ampute.continuous.R
@@ -24,7 +24,7 @@
 #' @author Rianne Schouten [aut, cre], Gerko Vink [aut], Peter Lugtig [ctb], 2016
 #' @seealso \code{\link{ampute}}, \code{\link{ampute.default.type}}
 #' @references
-#' #'Van Buuren, S. (2018).
+#' Van Buuren, S. (2018).
 #' \href{https://stefvanbuuren.name/fimd/sec-linearnormal.html#sec:generateuni}{\emph{Flexible Imputation of Missing Data. Second Edition.}}
 #' Chapman & Hall/CRC. Boca Raton, FL.
 #' @keywords internal
diff --git a/R/futuremice.R b/R/futuremice.R
index 677a7ce2c..4142e8935 100644
--- a/R/futuremice.R
+++ b/R/futuremice.R
@@ -61,7 +61,7 @@
 #' Volker, T.B. and Vink, G. (2022). futuremice: The future starts today.
 #' \url{https://www.gerkovink.com/miceVignettes/futuremice/Vignette_futuremice.html}
 #'
-#' #'Van Buuren, S. (2018).
+#' Van Buuren, S. (2018).
 #' \href{https://stefvanbuuren.name/fimd/parallel-computation.html}{\emph{Flexible Imputation of Missing Data. Second Edition.}}
 #' Chapman & Hall/CRC. Boca Raton, FL.
 #'
diff --git a/R/mice-package.R b/R/mice-package.R
index 925085be5..42f97159b 100644
--- a/R/mice-package.R
+++ b/R/mice-package.R
@@ -47,8 +47,7 @@
 #' \item \href{https://www.gerkovink.com/miceVignettes/Multi_level/Multi_level_data.html}{Imputing multilevel data}
 #' \item \href{https://www.gerkovink.com/miceVignettes/Sensitivity_analysis/Sensitivity_analysis.html}{Sensitivity analysis with \pkg{mice}}
 #' }
-#'
-#' #'Van Buuren, S. (2018).
+#' Van Buuren, S. (2018).
 #' Boca Raton, FL.: Chapman & Hall/CRC Press.
 
 #' The book
diff --git a/R/mice.R b/R/mice.R
index c89c74616..8bc2d0f02 100644
--- a/R/mice.R
+++ b/R/mice.R
@@ -110,7 +110,7 @@
 #' visited. In that way, deterministic relation between columns will always be
 #' synchronized.
 #'
-#' #'A new argument \code{ls.meth} can be parsed to the lower level
+#' A new argument \code{ls.meth} can be parsed to the lower level
 #' \code{.norm.draw} to specify the method for generating the least squares
 #' estimates and any subsequently derived estimates. Argument \code{ls.meth}
 #' takes one of three inputs: \code{"qr"} for QR-decomposition, \code{"svd"} for
diff --git a/R/mira.R b/R/mira.R
index 18d826fe5..a8ab50a22 100644
--- a/R/mira.R
+++ b/R/mira.R
@@ -32,7 +32,7 @@
 #' methods and add these to \code{broom} according to the specifications
 #' given in \url{https://broom.tidymodels.org}.
 #'
-#' #'The \code{mira} class of objects has methods for the
+#' The \code{mira} class of objects has methods for the
 #' following generic functions: \code{print}, \code{summary}.
 #'
 #' Many of the functions of the \code{mice} package do not use the
diff --git a/R/parlmice.R b/R/parlmice.R
index b78748991..e02464fff 100644
--- a/R/parlmice.R
+++ b/R/parlmice.R
@@ -50,7 +50,7 @@
 #' Schouten, R. and Vink, G. (2017). parlmice: faster, paraleller, micer.
 #' \url{https://www.gerkovink.com/parlMICE/Vignette_parlMICE.html}
 #'
-#' #'Van Buuren, S. (2018).
+#' Van Buuren, S. (2018).
 #' \href{https://stefvanbuuren.name/fimd/parallel-computation.html}{\emph{Flexible Imputation of Missing Data. Second Edition.}}
 #' Chapman & Hall/CRC. Boca Raton, FL.
 #'
diff --git a/man/ampute.continuous.Rd b/man/ampute.continuous.Rd
index 3f0c72e9c..590d15828 100644
--- a/man/ampute.continuous.Rd
+++ b/man/ampute.continuous.Rd
@@ -36,7 +36,7 @@ weighted sum scores, calculated earlier in the multivariate amputation function
 \code{\link{ampute}}.
 }
 \references{
-#'Van Buuren, S. (2018).
+Van Buuren, S. (2018).
 \href{https://stefvanbuuren.name/fimd/sec-linearnormal.html#sec:generateuni}{\emph{Flexible Imputation of Missing Data. Second Edition.}}
 Chapman & Hall/CRC. Boca Raton, FL.
 }
diff --git a/man/futuremice.Rd b/man/futuremice.Rd
index 238f9f8a9..021a4ae99 100644
--- a/man/futuremice.Rd
+++ b/man/futuremice.Rd
@@ -99,7 +99,7 @@ pool(fit)
 Volker, T.B. and Vink, G. (2022). futuremice: The future starts today.
 \url{https://www.gerkovink.com/miceVignettes/futuremice/Vignette_futuremice.html}
 
-#'Van Buuren, S. (2018).
+Van Buuren, S. (2018).
 \href{https://stefvanbuuren.name/fimd/parallel-computation.html}{\emph{Flexible Imputation of Missing Data. Second Edition.}}
 Chapman & Hall/CRC. Boca Raton, FL.
 }
diff --git a/man/mice.Rd b/man/mice.Rd
index 38a9dfbc7..9527966a5 100644
--- a/man/mice.Rd
+++ b/man/mice.Rd
@@ -287,7 +287,7 @@ to specify \code{visitSequence} such that the column that is imputed by the
 visited. In that way, deterministic relation between columns will always be
 synchronized.
 
-#'A new argument \code{ls.meth} can be parsed to the lower level
+A new argument \code{ls.meth} can be parsed to the lower level
 \code{.norm.draw} to specify the method for generating the least squares
 estimates and any subsequently derived estimates. Argument \code{ls.meth}
 takes one of three inputs: \code{"qr"} for QR-decomposition, \code{"svd"} for
@@ -335,8 +335,7 @@ We suggest going through these vignettes in the following order
 \item \href{https://www.gerkovink.com/miceVignettes/Multi_level/Multi_level_data.html}{Imputing multilevel data}
 \item \href{https://www.gerkovink.com/miceVignettes/Sensitivity_analysis/Sensitivity_analysis.html}{Sensitivity analysis with \pkg{mice}}
 }
-
-#'Van Buuren, S. (2018).
+Van Buuren, S. (2018).
 Boca Raton, FL.: Chapman & Hall/CRC Press.
 The book
 \href{https://stefvanbuuren.name/fimd/}{\emph{Flexible Imputation of Missing Data. Second Edition.}}
diff --git a/man/mira-class.Rd b/man/mira-class.Rd
index ced37437f..2549106fb 100644
--- a/man/mira-class.Rd
+++ b/man/mira-class.Rd
@@ -25,7 +25,7 @@ way to solve this problem is to write your own \code{glance()} and \code{tidy()}
 methods and add these to \code{broom} according to the specifications
 given in \url{https://broom.tidymodels.org}.
 
-#'The \code{mira} class of objects has methods for the
+The \code{mira} class of objects has methods for the
 following generic functions: \code{print}, \code{summary}.
 
 Many of the functions of the \code{mice} package do not use the
diff --git a/man/parlmice.Rd b/man/parlmice.Rd
index c3ca0f503..84dd6c00e 100644
--- a/man/parlmice.Rd
+++ b/man/parlmice.Rd
@@ -84,7 +84,7 @@ pool(fit)
 Schouten, R. and Vink, G. (2017). parlmice: faster, paraleller, micer.
 \url{https://www.gerkovink.com/parlMICE/Vignette_parlMICE.html}
 
-#'Van Buuren, S. (2018).
+Van Buuren, S. (2018).
 \href{https://stefvanbuuren.name/fimd/parallel-computation.html}{\emph{Flexible Imputation of Missing Data. Second Edition.}}
 Chapman & Hall/CRC. Boca Raton, FL.
 }