diff --git a/examples/style_sheets/plot_ggplot.py b/examples/style_sheets/plot_ggplot.py
index a4fec65ce32..b5777040f2a 100644
--- a/examples/style_sheets/plot_ggplot.py
+++ b/examples/style_sheets/plot_ggplot.py
@@ -6,8 +6,8 @@
 
 .. [1] http://www.huyng.com/posts/sane-color-scheme-for-matplotlib/
 
-.. _ggplot: http://had.co.nz/ggplot/
-.. _R: http://www.r-project.org/
+.. _ggplot: http://ggplot2.org/
+.. _R: https://www.r-project.org/
 
 """
 import numpy as np