diff --git a/CHANGES.md b/CHANGES.md
index bb7ec6520..89ca1210b 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -3,6 +3,7 @@
 # v 1.28
 
 * Changes
+  * Port to Cesium 1.34.
   * Use all the styles defined for a feature.
   * Display geometries coming from style (using getGeometryFunction()).
 
diff --git a/cesium b/cesium
index ff31384c5..34a648b0a 160000
--- a/cesium
+++ b/cesium
@@ -1 +1 @@
-Subproject commit ff31384c534338b864d569ebaaab41eec0ee9151
+Subproject commit 34a648b0a66a493a2a42a98116cadc0ef6ab0b4a
diff --git a/package.json b/package.json
index 4d87f78c1..f912511ec 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "ol-cesium",
-  "version": "1.27.0",
+  "version": "1.28.0",
   "description": "OpenLayers Cesium integration library",
   "scripts": {},
   "repository": {
@@ -16,9 +16,9 @@
     "htmlparser2": "3.9.2"
   },
   "devDependencies": {
-    "closure-util": "1.19.0",
+    "closure-util": "1.21.0",
     "@mapbox/geojsonhint": "2.0.1",
-    "fs-extra": "3.0.0",
+    "fs-extra": "3.0.1",
     "jsdoc": "~3.4.0",
     "eslint": "3.19.0",
     "eslint-config-openlayers": "7.0.0",