diff --git a/src/ol/geom/geometry.js b/src/ol/geom/geometry.js
index f74a083a92..c75da4f1eb 100644
--- a/src/ol/geom/geometry.js
+++ b/src/ol/geom/geometry.js
@@ -172,7 +172,7 @@ ol.geom.Geometry.prototype.getExtent = function(opt_extent) {
 /**
  * Create a simplified version of this geometry.  For linestrings, this uses
  * the the {@link
- * http://en.wikipedia.org/wiki/Ramer%E2%80%93Douglas%E2%80%93Peucker_algorithm
+ * https://en.wikipedia.org/wiki/Ramer-Douglas-Peucker_algorithm
  * Douglas Peucker} algorithm.  For polygons, a quantization-based
  * simplification is used to preserve topology.
  * @function
@@ -189,7 +189,7 @@ ol.geom.Geometry.prototype.simplify = function(tolerance) {
 /**
  * Create a simplified version of this geometry using the Douglas Peucker
  * algorithm.
- * @see http://en.wikipedia.org/wiki/Ramer%E2%80%93Douglas%E2%80%93Peucker_algorithm
+ * @see https://en.wikipedia.org/wiki/Ramer-Douglas-Peucker_algorithm
  * @function
  * @param {number} squaredTolerance Squared tolerance.
  * @return {ol.geom.Geometry} Simplified geometry.