diff --git a/build.gradle b/build.gradle
index 9eecfbe5..fc2a36ae 100644
--- a/build.gradle
+++ b/build.gradle
@@ -44,13 +44,6 @@ dependencies {
     implementation 'com.fasterxml.jackson.module:jackson-module-kotlin:2.9.8'
     implementation 'io.quarkus:quarkus-undertow'
     implementation 'javax.servlet:javax.servlet-api:4.0.1'
-    implementation "org.apache.poi:poi:4.1.2"
-    implementation "org.apache.poi:poi-ooxml:4.1.2"
-    implementation "org.graalvm.sdk:graal-sdk:1.0.0-rc9"
-    implementation "org.graalvm.js:js:1.0.0-rc9"
-    implementation "org.graalvm.js:js-scriptengine:1.0.0-rc9"
-    implementation "org.graalvm.tools:profiler:1.0.0-rc9"
-    implementation "org.graalvm.tools:chromeinspector:1.0.0-rc9"
 
     testImplementation 'org.awaitility:awaitility:3.1.2'
     testImplementation 'org.apache.pdfbox:pdfbox:2.0.8'
diff --git a/src/main/java/fi/metatavu/metaform/server/script/ScriptProcessor.java b/src/main/java/fi/metatavu/metaform/server/script/ScriptProcessor.java
index f242965f..54219f33 100644
--- a/src/main/java/fi/metatavu/metaform/server/script/ScriptProcessor.java
+++ b/src/main/java/fi/metatavu/metaform/server/script/ScriptProcessor.java
@@ -10,6 +10,7 @@
 import javax.inject.Inject;
 
 import org.graalvm.polyglot.Context;
+import org.graalvm.polyglot.HostAccess;
 import org.graalvm.polyglot.Source;
 import org.graalvm.polyglot.Value;
 import org.slf4j.Logger;
@@ -40,7 +41,7 @@ public class ScriptProcessor {
    * @return processed output
    */
   public String processScript(RunnableScript script, Map<String, String> params) {
-    try (Context scriptingContext = Context.create(script.getLanguage())) {
+    try (Context scriptingContext = createContext(script)) {
       Map<String, String> scriptArgs = new HashMap<>();
       
       params.keySet().stream().forEach(param -> {
@@ -50,12 +51,14 @@ public String processScript(RunnableScript script, Map<String, String> params) {
       });
       
       Value bindings = scriptingContext.getBindings(script.getLanguage());
-      
+
       bindings.putMember("XMLHttpRequest", XMLHttpRequest.class);
       bindings.putMember("form", formScriptBinding);
       bindings.putMember("args", scriptArgs);
       
-      Source source = Source.newBuilder(script.getLanguage(), script.getContent(), script.getName()).build();
+      Source source = Source
+        .newBuilder(script.getLanguage(), script.getContent(), script.getName())
+        .build();
   
       Value returnValue = scriptingContext.eval(source);
       
@@ -69,6 +72,18 @@ public String processScript(RunnableScript script, Map<String, String> params) {
     
     return "";
   }
+
+  private Context createContext(RunnableScript script) {
+    return Context.newBuilder(script.getLanguage())
+      .allowHostAccess(HostAccess.ALL)
+      .allowAllAccess(true)
+      .allowCreateThread(true)
+      .allowHostClassLoading(true)
+      .allowIO(true)
+      .allowNativeAccess(true)
+      .allowCreateProcess(true)
+      .build();
+  }
   
   
 }
diff --git a/src/main/java/fi/metatavu/metaform/server/xlsx/AbstractXlsxBuilder.java b/src/main/java/fi/metatavu/metaform/server/xlsx/AbstractXlsxBuilder.java
index d51ef225..18fa7d34 100644
--- a/src/main/java/fi/metatavu/metaform/server/xlsx/AbstractXlsxBuilder.java
+++ b/src/main/java/fi/metatavu/metaform/server/xlsx/AbstractXlsxBuilder.java
@@ -10,11 +10,7 @@
 import java.util.UUID;
 
 import org.apache.poi.common.usermodel.HyperlinkType;
-import org.apache.poi.ss.usermodel.Cell;
-import org.apache.poi.ss.usermodel.CellStyle;
-import org.apache.poi.ss.usermodel.CreationHelper;
-import org.apache.poi.ss.usermodel.Hyperlink;
-import org.apache.poi.ss.usermodel.Row;
+import org.apache.poi.ss.usermodel.*;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -76,7 +72,7 @@ public S getSheet(String sheetId) {
   /**
    * Returns sheet by sheetId
    * 
-   * @param sheetId sheet id
+   * @param sheetName sheet name
    * @return sheet or null if not found
    */
   public S getSheetByName(String sheetName) {
@@ -433,7 +429,12 @@ public Cell setCellFormula(String sheetId, int rowNumber, int columnNumber, Stri
    * @throws IOException thrown when writing fails
    */
   public void write(OutputStream stream) throws IOException {
-    workbook.getCreationHelper().createFormulaEvaluator().evaluateAll();
+    try {
+      workbook.getCreationHelper().createFormulaEvaluator().evaluateAll();
+    } catch (Exception e) {
+      // just silently eat the exception away
+    }
+
     workbook.write(stream);
   }
 
diff --git a/src/main/java/fi/metatavu/metaform/server/xlsx/XlsxBuilder.java b/src/main/java/fi/metatavu/metaform/server/xlsx/XlsxBuilder.java
index cbfa5a2c..a2801b03 100644
--- a/src/main/java/fi/metatavu/metaform/server/xlsx/XlsxBuilder.java
+++ b/src/main/java/fi/metatavu/metaform/server/xlsx/XlsxBuilder.java
@@ -14,7 +14,7 @@ public class XlsxBuilder extends AbstractXlsxBuilder<SXSSFWorkbook, SXSSFSheet>
    * Constructor
    */
   public XlsxBuilder() {
-    super(new SXSSFWorkbook());
+    super(new SXSSFWorkbook(10000));
   }
 
 }