diff --git a/R/IDateTime.R b/R/IDateTime.R
index 713f72fa2..deae5a407 100644
--- a/R/IDateTime.R
+++ b/R/IDateTime.R
@@ -314,7 +314,7 @@ clip_msec = function(secs, action) {
 # Date - time extraction functions
 #   Adapted from Hadley Wickham's routines cited below to ensure
 #   integer results.
-#     http://gist.github.com/10238
+#     https://gist.github.com/hadley/10238
 #   See also Hadley et al's more advanced and complex lubridate package:
 #     https://github.com/tidyverse/lubridate
 #   lubridate routines do not return integer values.
diff --git a/man/IDateTime.Rd b/man/IDateTime.Rd
index 5ba65f96e..2104bb292 100644
--- a/man/IDateTime.Rd
+++ b/man/IDateTime.Rd
@@ -208,7 +208,7 @@ See 'Details' in \code{\link{round}} for more information.
   G. Grothendieck and T. Petzoldt, ``Date and Time Classes in R,''
   R News, vol. 4, no. 1, June 2004.
 
-  H. Wickham, https://gist.github.com/10238.
+  H. Wickham, https://gist.github.com/hadley/10238.
 
   ISO 8601, https://www.iso.org/iso/home/standards/iso8601.htm
 }