diff --git a/doc/tutorials/raster-reprojection.md b/doc/tutorials/raster-reprojection.md
index 5eae75df11..d9830c8469 100644
--- a/doc/tutorials/raster-reprojection.md
+++ b/doc/tutorials/raster-reprojection.md
@@ -45,7 +45,7 @@ The easiest way to use a custom projection is to add the [Proj4js](http://proj4j
 Following example shows definition of a [British National Grid](https://epsg.io/27700):
 
 ``` html
-<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/proj4js/2.4.3/proj4.js"></script>
+<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/proj4js/2.4.4/proj4.js"></script>
 ```
 
 ``` javascript
diff --git a/examples/reprojection-by-code.html b/examples/reprojection-by-code.html
index 75679d0deb..446aee77b6 100644
--- a/examples/reprojection-by-code.html
+++ b/examples/reprojection-by-code.html
@@ -8,7 +8,7 @@ docs: >
   in <a href="https://epsg.io/">EPSG.io</a> database.
 tags: "reprojection, projection, proj4js, epsg.io"
 resources:
-  - https://cdnjs.cloudflare.com/ajax/libs/proj4js/2.4.3/proj4.js
+  - https://cdnjs.cloudflare.com/ajax/libs/proj4js/2.4.4/proj4.js
 ---
 <div id="map" class="map"></div>
 <form class="form-inline">
diff --git a/examples/reprojection-image.html b/examples/reprojection-image.html
index c467a87bf0..0f4e01bf65 100644
--- a/examples/reprojection-image.html
+++ b/examples/reprojection-image.html
@@ -6,6 +6,6 @@ docs: >
   This example shows client-side reprojection of single image source.
 tags: "reprojection, projection, proj4js, image, imagestatic"
 resources:
-  - https://cdnjs.cloudflare.com/ajax/libs/proj4js/2.4.3/proj4.js
+  - https://cdnjs.cloudflare.com/ajax/libs/proj4js/2.4.4/proj4.js
 ---
 <div id="map" class="map"></div>
diff --git a/examples/reprojection.html b/examples/reprojection.html
index 2d668ea4a5..b87a7776a9 100644
--- a/examples/reprojection.html
+++ b/examples/reprojection.html
@@ -6,7 +6,7 @@ docs: >
   This example shows client-side raster reprojection between various projections.
 tags: "reprojection, projection, proj4js, osm, wms, wmts, hidpi"
 resources:
-  - https://cdnjs.cloudflare.com/ajax/libs/proj4js/2.4.3/proj4.js
+  - https://cdnjs.cloudflare.com/ajax/libs/proj4js/2.4.4/proj4.js
 ---
 <div id="map" class="map"></div>
 <form class="form-inline">
diff --git a/examples/scaleline-indiana-east.html b/examples/scaleline-indiana-east.html
index 33093f66c8..40d9dfe109 100644
--- a/examples/scaleline-indiana-east.html
+++ b/examples/scaleline-indiana-east.html
@@ -6,6 +6,6 @@ docs: >
   This example shows client-side reprojection of OpenStreetMap to NAD83 Indiana East, including a ScaleLine control with US units.
 tags: "reprojection, projection, openstreetmap, nad83, tile, scaleline"
 resources:
-  - https://cdnjs.cloudflare.com/ajax/libs/proj4js/2.4.3/proj4.js
+  - https://cdnjs.cloudflare.com/ajax/libs/proj4js/2.4.4/proj4.js
 ---
 <div id="map" class="map"></div>
diff --git a/examples/sphere-mollweide.html b/examples/sphere-mollweide.html
index f2049e4279..13286a4a39 100644
--- a/examples/sphere-mollweide.html
+++ b/examples/sphere-mollweide.html
@@ -6,6 +6,6 @@ docs: >
   Example of a Sphere Mollweide map with a Graticule component.
 tags: "graticule, Mollweide, projection, proj4js"
 resources:
-  - https://cdnjs.cloudflare.com/ajax/libs/proj4js/2.4.3/proj4.js
+  - https://cdnjs.cloudflare.com/ajax/libs/proj4js/2.4.4/proj4.js
 ---
 <div id="map" class="map"></div>
diff --git a/examples/wms-image-custom-proj.html b/examples/wms-image-custom-proj.html
index 66e16fdedc..9ae33190df 100644
--- a/examples/wms-image-custom-proj.html
+++ b/examples/wms-image-custom-proj.html
@@ -6,7 +6,7 @@ docs: >
   With [Proj4js](http://proj4js.org/) integration, OpenLayers can transform coordinates between arbitrary projections.
 tags: "wms, single image, proj4js, projection"
 resources:
-  - https://cdnjs.cloudflare.com/ajax/libs/proj4js/2.4.3/proj4.js
+  - https://cdnjs.cloudflare.com/ajax/libs/proj4js/2.4.4/proj4.js
   - https://epsg.io/21781-1753.js
 ---
 <div id="map" class="map"></div>
diff --git a/package.json b/package.json
index 2b375f49d3..2282c26d2b 100644
--- a/package.json
+++ b/package.json
@@ -68,7 +68,7 @@
     "mocha-phantomjs-core": "^2.1.0",
     "mustache": "2.3.0",
     "phantomjs-prebuilt": "2.1.14",
-    "proj4": "2.4.3",
+    "proj4": "2.4.4",
     "resemblejs": "2.2.4",
     "serve-files": "1.0.1",
     "sinon": "3.2.0",