diff --git a/R/quaternary.R b/R/quaternary.R
index 20f7996..bf06b27 100644
--- a/R/quaternary.R
+++ b/R/quaternary.R
@@ -8,7 +8,7 @@
 #' A dynamic rotating view in a GIF image file can be created with
 #' \code{\link{writeQuaternaryGIF}}. Package \code{magick} must be installed in
 #' advance. Linux users may refer to this
-#' \href{https://cran.r-project.org/web/packages/magick/vignettes/intro.html#Build_from_source}{installation guide}.
+#' \href{https://cran.r-project.org/package=magick/vignettes/intro.html#Build_from_source}{installation guide}.
 #' @param x Input data. Can be a \code{matrix} or \code{dgCMatrix} object with
 #' cells as columns, a \code{Seurat} or \code{SingleCellExperiment} object.
 #' "simMat" method takes intermediate values.
diff --git a/man/plotQuaternary.Rd b/man/plotQuaternary.Rd
index 9d379dd..cd4ec52 100644
--- a/man/plotQuaternary.Rd
+++ b/man/plotQuaternary.Rd
@@ -187,7 +187,7 @@ See \code{\link{plotTernary}} for more details.
 A dynamic rotating view in a GIF image file can be created with
 \code{\link{writeQuaternaryGIF}}. Package \code{magick} must be installed in
 advance. Linux users may refer to this
-\href{https://cran.r-project.org/web/packages/magick/vignettes/intro.html#Build_from_source}{installation guide}.
+\href{https://cran.r-project.org/package=magick/vignettes/intro.html#Build_from_source}{installation guide}.
 }
 \examples{
 gene <- selectTopFeatures(rnaRaw, rnaCluster, c("RE", "OS", "CH", "ORT"))
diff --git a/vignettes/CytoSimplex.Rmd b/vignettes/CytoSimplex.Rmd
index 69ac4b7..1d883dc 100644
--- a/vignettes/CytoSimplex.Rmd
+++ b/vignettes/CytoSimplex.Rmd
@@ -125,7 +125,7 @@ plotQuaternary(rnaRaw, clusterVar = rnaCluster, vertices = vt.quat,
 
 **↑↑↑Try drag it!**
 
-We have also implemented of GIF image generator that rotates the tetrahedron rounding the z-axis. Note that package `magick` is required for this feature. (<a href="https://cran.r-project.org/web/packages/magick/vignettes/intro.html#Installing_magick" target="_blank">See here for how to install `magick` in detail</a>)
+We have also implemented of GIF image generator that rotates the tetrahedron rounding the z-axis. Note that package `magick` is required for this feature. (<a href="https://cran.r-project.org/package=magick/vignettes/intro.html#Installing_magick" target="_blank">See here for how to install `magick` in detail</a>)
 
 ```{R writeGIF, results="hide"}
 writeQuaternaryGIF(rnaRaw, clusterVar = rnaCluster, vertices = vt.quat,