diff --git a/package.json b/package.json
index 9db4bed..9bb6d41 100644
--- a/package.json
+++ b/package.json
@@ -3,7 +3,7 @@
   "license": "UNLICENSED",
   "vaadin": {
     "dependencies": {
-      "lit-element": "2.3.1",
+      "lit-element": "2.5.1",
       "@vaadin/router": "1.7.2",
       "@polymer/polymer": "3.2.0",
       "@vaadin/vaadin-grid": "6.0.0",
@@ -42,7 +42,9 @@
       "@vaadin/vaadin-lumo-styles": "1.6.1",
       "@vaadin/vaadin-material-styles": "1.3.2",
       "open": "^7.2.1",
-      "@xpertsea/paper-slider": "3.0.0"
+      "@xpertsea/paper-slider": "3.0.0",
+      "construct-style-sheets-polyfill": "2.4.16",
+      "lit-html": "1.4.1"
     },
     "devDependencies": {
       "compression-webpack-plugin": "4.0.1",
@@ -70,12 +72,13 @@
       "idb": "5.0.6",
       "workbox-core": "5.1.4",
       "workbox-precaching": "5.1.4",
-      "webpack-manifest-plugin": "3.0.0"
+      "webpack-manifest-plugin": "3.0.0",
+      "fork-ts-checker-webpack-plugin": "6.2.1"
     },
     "hash": "3d6d8acc275708b3d27c18127c672df694458c8135eb960aed173821f31e3203"
   },
   "dependencies": {
-    "lit-element": "2.3.1",
+    "lit-element": "2.5.1",
     "@vaadin/router": "1.7.2",
     "@polymer/polymer": "3.2.0",
     "@vaadin/flow-frontend": "./target/flow-frontend",
@@ -115,7 +118,9 @@
     "@vaadin/vaadin-lumo-styles": "1.6.1",
     "@vaadin/vaadin-material-styles": "1.3.2",
     "open": "^7.2.1",
-    "@xpertsea/paper-slider": "3.0.0"
+    "@xpertsea/paper-slider": "3.0.0",
+    "construct-style-sheets-polyfill": "2.4.16",
+    "lit-html": "1.4.1"
   },
   "devDependencies": {
     "compression-webpack-plugin": "4.0.1",
@@ -143,6 +148,7 @@
     "idb": "5.0.6",
     "workbox-core": "5.1.4",
     "workbox-precaching": "5.1.4",
-    "webpack-manifest-plugin": "3.0.0"
+    "webpack-manifest-plugin": "3.0.0",
+    "fork-ts-checker-webpack-plugin": "6.2.1"
   }
 }
diff --git a/pom.xml b/pom.xml
index 88aa8bb..fb5ce4b 100644
--- a/pom.xml
+++ b/pom.xml
@@ -14,7 +14,7 @@
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
 
-        <vaadin.version>19.0.0</vaadin.version>
+        <vaadin.version>19.0.9</vaadin.version>
     </properties>
 
     <parent>