diff --git a/cli/src/main/java/ca/weblite/jdeploy/cheerpj/services/BuildCheerpjAppService.java b/cli/src/main/java/ca/weblite/jdeploy/cheerpj/services/BuildCheerpjAppService.java
index 7ad94b3..836eeef 100644
--- a/cli/src/main/java/ca/weblite/jdeploy/cheerpj/services/BuildCheerpjAppService.java
+++ b/cli/src/main/java/ca/weblite/jdeploy/cheerpj/services/BuildCheerpjAppService.java
@@ -24,6 +24,8 @@ public static class Params {
         private File appJar;
         private File outputDir;
 
+        private String cheerpjLoader = "https://cjrtnc.leaningtech.com/3.0rc2/cj3loader.js";
+
         public File getOutputDir() {
             return outputDir;
         }
@@ -59,6 +61,15 @@ public Params setIconFile(File iconFile) {
             this.iconFile = iconFile;
             return this;
         }
+
+        public Params setCheerpjLoader(String cheerpjLoader) {
+            this.cheerpjLoader = cheerpjLoader;
+            return this;
+        }
+
+        public String getCheerpjLoader() {
+            return cheerpjLoader;
+        }
     }
     public void build(Params params) throws IOException {
         String mainClass = extractMainClass(params.getAppJar());
@@ -67,6 +78,7 @@ public void build(Params params) throws IOException {
                 this.getClass().getResourceAsStream("/ca/weblite/jdeploy/cheerpj/index.html")
         );
 
+        indexHtml = indexHtml.replace("{{ cheerpjLoader }}", params.getCheerpjLoader());
         indexHtml = indexHtml.replace("{{ mainClass }}", mainClass);
         indexHtml = indexHtml.replace("{{ classPath }}", classPath);
         indexHtml = indexHtml.replace("{{ appName }}", params.getAppName());
diff --git a/cli/src/main/java/ca/weblite/jdeploy/services/CheerpjService.java b/cli/src/main/java/ca/weblite/jdeploy/services/CheerpjService.java
index 2a2f247..c53f71f 100644
--- a/cli/src/main/java/ca/weblite/jdeploy/services/CheerpjService.java
+++ b/cli/src/main/java/ca/weblite/jdeploy/services/CheerpjService.java
@@ -14,6 +14,8 @@
 public class CheerpjService extends BaseService {
     private BuildCheerpjAppService buildCheerpjAppService;
 
+    private static final String DEFAULT_CHEERPJ_LOADER = "https://cjrtnc.leaningtech.com/3.0rc2/cj3loader.js";
+
     public CheerpjService(File packageJSONFile, JSONObject packageJSON) throws IOException {
         super(packageJSONFile, packageJSON);
         buildCheerpjAppService = new BuildCheerpjAppService();
@@ -34,6 +36,7 @@ private void run() throws IOException {
         File dest = this.getDestDirectory();
         buildCheerpjAppService.build(
                 new BuildCheerpjAppService.Params()
+                        .setCheerpjLoader(getCheerpjLoader(DEFAULT_CHEERPJ_LOADER))
                         .setAppName(getAppName())
                         .setAppJar(mainJar)
                         .setOutputDir(dest)
@@ -108,6 +111,20 @@ private JSONObject getGithubPagesConfig() {
         return config;
     }
 
+    private JSONObject getCheerpjObject() {
+        if (!isEnabled()) {
+            return new JSONObject();
+        }
+        return getJDeployObject().getJSONObject("cheerpj");
+    }
+
+    private String getCheerpjLoader(String defaultValue) {
+        if (!getCheerpjObject().has("loader")) {
+            return defaultValue;
+        }
+        return getCheerpjObject().getString("loader");
+    }
+
     private String getCurrentTag() throws IOException, InterruptedException {
         ProcessBuilder processBuilder = new ProcessBuilder();
         processBuilder.command("git", "describe", "--tags", "--exact-match");
diff --git a/cli/src/main/resources/ca/weblite/jdeploy/cheerpj/index.html b/cli/src/main/resources/ca/weblite/jdeploy/cheerpj/index.html
index cad079e..85ff67a 100644
--- a/cli/src/main/resources/ca/weblite/jdeploy/cheerpj/index.html
+++ b/cli/src/main/resources/ca/weblite/jdeploy/cheerpj/index.html
@@ -7,11 +7,11 @@
 
     <title>{{ title }}</title>
 
-    <script src="https://cjrtnc.leaningtech.com/3_20230915_194/cj3loader.js"></script>
+    <script src="{{ cheerpjLoader }}"></script>
 
     <style>
       html, body { margin: 0; height: 100%; }
-      #cheerpjDisplay {display: none !important;}
+      #cheerpjDisplay {width: 100%; height:100%; background-color: transparent}
       #cheerpjDisplay.finished-loading { display: block !important; }
     </style>
     <style>
@@ -371,7 +371,7 @@
             setProgress(10);
             window.cj1 = await cheerpjInit();
             setProgress(50);
-            window.cj2 = await cheerpjCreateDisplay(800, 600);
+            window.cj2 = await cheerpjCreateDisplay(window.innerWidth, window.innerHeight);
             setProgress(75);
             setLabel2("Preparing application components...");
             const cj = await cheerpjRunLibrary(prefixClassPath(getClassPathPrefix(), "{{ classPath }}"));
@@ -380,7 +380,14 @@
             async function onWindowResize() {
                 document.getElementById("cheerpjDisplay").style.height = '100%';
                 document.getElementById("cheerpjDisplay").style.width = '100%';
-                await CheerpjSwingUtils.onResize();
+                while (true) {
+                    try {
+                        await CheerpjSwingUtils.onResize();
+                        break;
+                    } catch (e) {
+                        console.log(e);
+                    }
+                }
             }
             window.addEventListener("resize", onWindowResize);
             setProgress(90);