diff --git a/R/apex.R b/R/apex.R
index 3310a3b..7594a2a 100644
--- a/R/apex.R
+++ b/R/apex.R
@@ -121,7 +121,7 @@ make_series <- function(mapdata, mapping, type = NULL, serie_name = NULL, force_
       warning("'group' aesthetic in candlestick chart is not supported", call. = FALSE)
     mapdata$group <- NULL
     series <- parse_candlestick_data(mapdata)
-  } else if (identical(type, "rangeBar")) {
+  } else if (isTRUE(type %in% c("rangeBar", "timeline"))) {
     if (!all(c("x", "start", "end") %in% names(mapping)))
       stop("For timeline charts 'x', 'start', and 'end' aesthetics must be provided.", call. = FALSE)
     if (is.null(mapdata$group))
diff --git a/examples/timeline.R b/examples/timeline.R
index 7ed72be..8e6fbcd 100644
--- a/examples/timeline.R
+++ b/examples/timeline.R
@@ -2,8 +2,13 @@ library(apexcharter)
 
 data("presidential", package = "ggplot2")
 
-# Basic
-apex(presidential, aes(x = name, start = start, end = end), "timeline")
+# Basic (with formated date in tooltip)
+apex(presidential, aes(x = name, start = start, end = end), "timeline") %>% 
+  ax_tooltip(
+    x = list(
+      format = "yyyy"
+    )
+  )
 
 # With groups
 apex(presidential,