diff --git a/DESCRIPTION b/DESCRIPTION
index 66aac12..fd7cf88 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -2,7 +2,7 @@ Type: Package
 Package: CCAMLRGIS
 Title: Antarctic Spatial Data Manipulation
 Version: 4.2.1
-Date: 2025-02-14
+Date: 2025-02-17
 Authors@R:
     c(person("Stephane","Thanassekos",role = c("aut", "cre"), email = "stephane.thanassekos@ccamlr.org"),
     person("Keith", "Reid", role = "aut"),
diff --git a/R/add_Cscale.R b/R/add_Cscale.R
index 9e87a49..515fc55 100644
--- a/R/add_Cscale.R
+++ b/R/add_Cscale.R
@@ -35,7 +35,7 @@
 #' @seealso 
 #' \code{\link{load_Bathy}}, \code{\link{SmallBathy}}, \code{\link{Depth_cuts}}, \code{\link{Depth_cols}}, 
 #' \code{\link{Depth_cuts2}}, \code{\link{Depth_cols2}}, \code{\link{add_col}}, \code{\link{add_Legend}},
-#' \href{http://www.stat.columbia.edu/~tzheng/files/Rcolor.pdf}{R colors}, \code{\link[graphics]{legend}}.
+#' \href{https://sites.stat.columbia.edu/tzheng/files/Rcolor.pdf}{R colors}, \code{\link[graphics]{legend}}.
 #' 
 #' @examples
 #' 
diff --git a/R/add_col.R b/R/add_col.R
index d055847..d91bcbf 100644
--- a/R/add_col.R
+++ b/R/add_col.R
@@ -9,7 +9,7 @@
 #' @param cuts numeric, controls color classes. Either one value (in which case \code{n=cuts} equally
 #' spaced color classes are generated) or a vector (in which case irregular color classes are
 #' generated e.g.: \code{c(-10,0,100,2000)}).
-#' @param cols character vector of colors (see R standard color names \href{http://www.stat.columbia.edu/~tzheng/files/Rcolor.pdf}{here}).
+#' @param cols character vector of colors (see R standard color names \href{https://sites.stat.columbia.edu/tzheng/files/Rcolor.pdf}{here}).
 #' \code{cols} are interpolated along \code{cuts}. Color codes as those generated,
 #' for example, by \code{\link[grDevices]{rgb}} may also be used.
 #' @return list containing the colors for the variable \code{var} (given as \code{$varcol} in the output) as
@@ -17,7 +17,7 @@
 #'
 #' @seealso 
 #' \code{\link{add_Cscale}}, \code{\link{create_PolyGrids}}, \code{\link{add_Legend}},
-#'  \href{http://www.stat.columbia.edu/~tzheng/files/Rcolor.pdf}{R colors}.
+#'  \href{https://sites.stat.columbia.edu/tzheng/files/Rcolor.pdf}{R colors}.
 #' 
 #' @examples
 #' 
diff --git a/R/add_labels.R b/R/add_labels.R
index bfba568..a2ec9ee 100644
--- a/R/add_labels.R
+++ b/R/add_labels.R
@@ -25,7 +25,7 @@
 #' @seealso \code{\link{Labels}}, \code{\link{load_ASDs}}, \code{\link{load_SSRUs}}, \code{\link{load_RBs}},
 #' \code{\link{load_SSMUs}}, \code{\link{load_MAs}}, \code{\link{load_EEZs}},
 #' \code{\link{load_MPAs}}, \code{\link{add_Legend}},
-#' \href{http://www.stat.columbia.edu/~tzheng/files/Rcolor.pdf}{R colors}.
+#' \href{https://sites.stat.columbia.edu/tzheng/files/Rcolor.pdf}{R colors}.
 #'  
 #' @examples
 #' \donttest{
diff --git a/README.Rmd b/README.Rmd
index 24aafe1..d161d84 100644
--- a/README.Rmd
+++ b/README.Rmd
@@ -1782,7 +1782,7 @@ Adding colors to plots revolves around two functions:
 ?add_Cscale
 ```
 
-*add_col()* generates colors for a variable of interest as well as a set of color classes and colors to be used as inputs to the *add_Cscale()* function. Colors and color classes may be generated automatically or customized, depending on the intended appearance. Knowing the names of colors in R would be useful here (<http://www.stat.columbia.edu/~tzheng/files/Rcolor.pdf>).
+*add_col()* generates colors for a variable of interest as well as a set of color classes and colors to be used as inputs to the *add_Cscale()* function. Colors and color classes may be generated automatically or customized, depending on the intended appearance. Knowing the names of colors in R would be useful here (<https://sites.stat.columbia.edu/tzheng/files/Rcolor.pdf>).
 
 ```{r message=F,eval=T}
 
diff --git a/README.md b/README.md
index 4d4f2d9..2f35001 100644
--- a/README.md
+++ b/README.md
@@ -1939,7 +1939,7 @@ of color classes and colors to be used as inputs to the *add_Cscale()*
 function. Colors and color classes may be generated automatically or
 customized, depending on the intended appearance. Knowing the names of
 colors in R would be useful here
-(<http://www.stat.columbia.edu/~tzheng/files/Rcolor.pdf>).
+(<https://sites.stat.columbia.edu/tzheng/files/Rcolor.pdf>).
 
 ``` r
 
diff --git a/man/add_Cscale.Rd b/man/add_Cscale.Rd
index ba4d03c..0a293db 100644
--- a/man/add_Cscale.Rd
+++ b/man/add_Cscale.Rd
@@ -133,5 +133,5 @@ pt.bg=Pcolors,xpd=TRUE)
 \seealso{
 \code{\link{load_Bathy}}, \code{\link{SmallBathy}}, \code{\link{Depth_cuts}}, \code{\link{Depth_cols}}, 
 \code{\link{Depth_cuts2}}, \code{\link{Depth_cols2}}, \code{\link{add_col}}, \code{\link{add_Legend}},
-\href{http://www.stat.columbia.edu/~tzheng/files/Rcolor.pdf}{R colors}, \code{\link[graphics]{legend}}.
+\href{https://sites.stat.columbia.edu/tzheng/files/Rcolor.pdf}{R colors}, \code{\link[graphics]{legend}}.
 }
diff --git a/man/add_col.Rd b/man/add_col.Rd
index 7eb3e4a..822cdfc 100644
--- a/man/add_col.Rd
+++ b/man/add_col.Rd
@@ -15,7 +15,7 @@ the range of values).}
 spaced color classes are generated) or a vector (in which case irregular color classes are
 generated e.g.: \code{c(-10,0,100,2000)}).}
 
-\item{cols}{character vector of colors (see R standard color names \href{http://www.stat.columbia.edu/~tzheng/files/Rcolor.pdf}{here}).
+\item{cols}{character vector of colors (see R standard color names \href{https://sites.stat.columbia.edu/tzheng/files/Rcolor.pdf}{here}).
 \code{cols} are interpolated along \code{cuts}. Color codes as those generated,
 for example, by \code{\link[grDevices]{rgb}} may also be used.}
 }
@@ -40,5 +40,5 @@ plot(st_geometry(MyPoints),pch=21,bg=MyCols$varcol,cex=2)
 }
 \seealso{
 \code{\link{add_Cscale}}, \code{\link{create_PolyGrids}}, \code{\link{add_Legend}},
- \href{http://www.stat.columbia.edu/~tzheng/files/Rcolor.pdf}{R colors}.
+ \href{https://sites.stat.columbia.edu/tzheng/files/Rcolor.pdf}{R colors}.
 }
diff --git a/man/add_labels.Rd b/man/add_labels.Rd
index b269062..54b58a7 100644
--- a/man/add_labels.Rd
+++ b/man/add_labels.Rd
@@ -83,5 +83,5 @@ add_labels(mode='auto',layer='EEZs',fontsize=2,col='green',angle=90)
 \code{\link{Labels}}, \code{\link{load_ASDs}}, \code{\link{load_SSRUs}}, \code{\link{load_RBs}},
 \code{\link{load_SSMUs}}, \code{\link{load_MAs}}, \code{\link{load_EEZs}},
 \code{\link{load_MPAs}}, \code{\link{add_Legend}},
-\href{http://www.stat.columbia.edu/~tzheng/files/Rcolor.pdf}{R colors}.
+\href{https://sites.stat.columbia.edu/tzheng/files/Rcolor.pdf}{R colors}.
 }