diff --git a/DESCRIPTION b/DESCRIPTION
index a5330a4..a7660a2 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -26,8 +26,8 @@ URL: https://github.com/hrbrmstr/ggalt
 BugReports: https://github.com/hrbrmstr/ggalt/issues
 Encoding: UTF-8
 Depends:
-    R (>= 3.0.0),
-    ggplot2 (>= 2.2.0)
+    R (>= 3.2.0),
+    ggplot2 (>= 2.2.1)
 Suggests:
     testthat,
     gridExtra,
diff --git a/R/coord_proj.r b/R/coord_proj.r
index 0e56281..9a9b61c 100644
--- a/R/coord_proj.r
+++ b/R/coord_proj.r
@@ -45,7 +45,7 @@
 #' world <- world[world$region != "Antarctica",]
 #'
 #' gg <- ggplot()
-#' gg <- gg + geom_map(data=world, map=world,
+#' gg <- gg + geom_cartogram(data=world, map=world,
 #'                     aes(x=long, y=lat, map_id=region))
 #' gg <- gg + coord_proj("+proj=wintri")
 #' gg
@@ -55,7 +55,7 @@
 #' usa <- usa[!(usa$subregion %in% c("Alaska", "Hawaii")),]
 #'
 #' gg <- ggplot()
-#' gg <- gg + geom_map(data=usa, map=usa,
+#' gg <- gg + geom_cartogram(data=usa, map=usa,
 #'                     aes(x=long, y=lat, map_id=region))
 #' gg <- gg + coord_proj(
 #'              paste0("+proj=aea +lat_1=29.5 +lat_2=45.5 +lat_0=37.5 +lon_0=-96",
@@ -66,7 +66,7 @@
 #' greenland <- world[world$region == "Greenland",]
 #'
 #' gg <- ggplot()
-#' gg <- gg + geom_map(data=greenland, map=greenland,
+#' gg <- gg + geom_cartogram(data=greenland, map=greenland,
 #'                     aes(x=long, y=lat, map_id=region))
 #' gg <- gg + coord_proj(
 #'              paste0("+proj=stere +lat_0=90 +lat_ts=70 +lon_0=-45 +k=1 +x_0=0",
diff --git a/R/geom_cartogram.r b/R/geom_cartogram.r
index b82c8d2..bbac09e 100644
--- a/R/geom_cartogram.r
+++ b/R/geom_cartogram.r
@@ -4,7 +4,18 @@
 #' \code{x} and \code{y} aesthetics.
 #'
 #' @section Aesthetics:
-#' \aesthetics{geom}{cartogram}
+#' \code{geom_cartogram} understands the following aesthetics (required aesthetics are in bold):
+#' \itemize{
+#'   \item \code{\strong{map_id}}
+#'   \item \code{alpha}
+#'   \item \code{colour}
+#'   \item \code{fill}
+#'   \item \code{group}
+#'   \item \code{linetype}
+#'   \item \code{size}
+#'   \item \code{x}
+#'   \item \code{y}
+#' }
 #'
 #' @export
 #' @param map Data frame that contains the map coordinates.  This will
diff --git a/man/coord_proj.Rd b/man/coord_proj.Rd
index 317296b..d405c3c 100644
--- a/man/coord_proj.Rd
+++ b/man/coord_proj.Rd
@@ -62,7 +62,7 @@ world <- map_data("world")
 world <- world[world$region != "Antarctica",]
 
 gg <- ggplot()
-gg <- gg + geom_map(data=world, map=world,
+gg <- gg + geom_cartogram(data=world, map=world,
                     aes(x=long, y=lat, map_id=region))
 gg <- gg + coord_proj("+proj=wintri")
 gg
@@ -72,7 +72,7 @@ usa <- world[world$region == "USA",]
 usa <- usa[!(usa$subregion \%in\% c("Alaska", "Hawaii")),]
 
 gg <- ggplot()
-gg <- gg + geom_map(data=usa, map=usa,
+gg <- gg + geom_cartogram(data=usa, map=usa,
                     aes(x=long, y=lat, map_id=region))
 gg <- gg + coord_proj(
              paste0("+proj=aea +lat_1=29.5 +lat_2=45.5 +lat_0=37.5 +lon_0=-96",
@@ -83,7 +83,7 @@ gg
 greenland <- world[world$region == "Greenland",]
 
 gg <- ggplot()
-gg <- gg + geom_map(data=greenland, map=greenland,
+gg <- gg + geom_cartogram(data=greenland, map=greenland,
                     aes(x=long, y=lat, map_id=region))
 gg <- gg + coord_proj(
              paste0("+proj=stere +lat_0=90 +lat_ts=70 +lon_0=-45 +k=1 +x_0=0",
diff --git a/man/geom_cartogram.Rd b/man/geom_cartogram.Rd
index 5c14e3c..c5b6735 100644
--- a/man/geom_cartogram.Rd
+++ b/man/geom_cartogram.Rd
@@ -58,7 +58,18 @@ This replicates the old behaviour of \code{geom_map()}, enabling specifying of
 }
 \section{Aesthetics}{
 
-\aesthetics{geom}{cartogram}
+\code{geom_cartogram} understands the following aesthetics (required aesthetics are in bold):
+\itemize{
+  \item \code{\strong{map_id}}
+  \item \code{alpha}
+  \item \code{colour}
+  \item \code{fill}
+  \item \code{group}
+  \item \code{linetype}
+  \item \code{size}
+  \item \code{x}
+  \item \code{y}
+}
 }
 
 \examples{