diff --git a/src/main/kotlin/org/arend/documentation/ArendDocumentationLibHtmlUtil.kt b/src/main/kotlin/org/arend/documentation/ArendDocumentationLibHtmlUtil.kt
index fd90a6acc..f206efca0 100644
--- a/src/main/kotlin/org/arend/documentation/ArendDocumentationLibHtmlUtil.kt
+++ b/src/main/kotlin/org/arend/documentation/ArendDocumentationLibHtmlUtil.kt
@@ -16,7 +16,6 @@ import com.intellij.psi.PsiManager
 import com.intellij.psi.PsiRecursiveElementVisitor
 import com.intellij.psi.util.elementType
 import com.intellij.testFramework.LightVirtualFile
-import org.apache.commons.lang.StringEscapeUtils
 import org.arend.highlight.ArendHighlightingColors
 import org.arend.highlight.ArendHighlightingPass
 import org.arend.highlight.ArendSyntaxHighlighter
@@ -279,7 +278,7 @@ private fun generateHtmlForArend(
                         counter = result.second
 
                         append("<a${" id=\"$id\""}${href?.let { " href=\"$it\" style=\"text-decoration:none;\"" } ?: ""}${
-                            cssClass?.let { " class=\"$it\"" } ?: ""}>${StringEscapeUtils.escapeHtml(element.text)}</a>")
+                            cssClass?.let { " class=\"$it\"" } ?: ""}>${element.text.htmlEscape()}</a>")
                     }
                 })
                 append("<script src=\"$extraHtmlDir/$AREND_JS\"></script>")
diff --git a/src/main/kotlin/org/arend/documentation/GenerateArendLibHtmlStarter.kt b/src/main/kotlin/org/arend/documentation/GenerateArendLibHtmlStarter.kt
index c8e1ae7fc..6f8af56a5 100644
--- a/src/main/kotlin/org/arend/documentation/GenerateArendLibHtmlStarter.kt
+++ b/src/main/kotlin/org/arend/documentation/GenerateArendLibHtmlStarter.kt
@@ -1,9 +1,9 @@
 package org.arend.documentation
 
 import com.intellij.openapi.application.ApplicationStarter
-import com.intellij.openapi.editor.colors.EditorColorsManager
 
 class GenerateArendLibHtmlStarter : ApplicationStarter {
+    @Suppress("OVERRIDE_DEPRECATION")
     override val commandName: String
         get() = "generateArendLibHtml"
 
diff --git a/src/main/kotlin/org/arend/graph/GraphSimulator.kt b/src/main/kotlin/org/arend/graph/GraphSimulator.kt
index 4576d0133..6ff059b41 100644
--- a/src/main/kotlin/org/arend/graph/GraphSimulator.kt
+++ b/src/main/kotlin/org/arend/graph/GraphSimulator.kt
@@ -1,13 +1,13 @@
 package org.arend.graph
 
-import com.intellij.notification.NotificationListener
+import com.intellij.ide.BrowserUtil
+import com.intellij.notification.NotificationAction
 import com.intellij.notification.Notifications
 import com.intellij.openapi.project.Project
 import com.intellij.openapi.ui.DialogWrapper
 import com.intellij.openapi.ui.MessageType
 import com.intellij.openapi.updateSettings.impl.pluginsAdvertisement.notificationGroup
-import com.intellij.ui.util.minimumHeight
-import com.intellij.ui.util.minimumWidth
+import com.intellij.ui.components.JBPanel
 import guru.nidi.graphviz.engine.Format
 import guru.nidi.graphviz.engine.Graphviz
 import guru.nidi.graphviz.model.Factory.graph
@@ -88,17 +88,17 @@ class GraphSimulator(
                 }
 
                 override fun createCenterPanel(): JComponent {
-                    val panel = JPanel()
+                    val panel = JBPanel<JBPanel<*>>()
                     panel.add(imageLabel)
                     panel.background = Color.WHITE
                     panel.addComponentListener(object : ComponentAdapter() {
                         override fun componentResized(e: ComponentEvent) {
                             val component = panel.components.getOrNull(0) ?: return
-                            panel.minimumWidth = baseImageIcon.iconWidth + size.width - e.component.width
-                            panel.minimumHeight = baseImageIcon.iconHeight + size.height - e.component.height
+                            panel.withMinimumWidth(baseImageIcon.iconWidth + size.width - e.component.width)
+                            panel.withMinimumHeight(baseImageIcon.iconHeight + size.height - e.component.height)
 
-                            val imageIcon = getImageIcon(baseImageIcon, graphviz, e.component.width - component.bounds.x * 2, e.component.height - component.bounds.y * 2)
-                            imageLabel = JLabel(imageIcon)
+                            val newImageIcon = getImageIcon(baseImageIcon, graphviz, e.component.width - component.bounds.x * 2, e.component.height - component.bounds.y * 2)
+                            imageLabel = JLabel(newImageIcon)
 
                             panel.removeAll()
                             panel.add(imageLabel)
@@ -137,8 +137,10 @@ class GraphSimulator(
             dialogWrapper.pack()
             dialogWrapper.show()
         } catch (e: Exception) {
-            val notification = notificationGroup.createNotification("It is not possible to visualize the diagram on your device. Install <a href=https://graphviz.org/download/>Graphviz</a> please", MessageType.WARNING)
-            notification.setListener(NotificationListener.UrlOpeningListener(true))
+            val notification = notificationGroup.createNotification("It is not possible to visualize the diagram on your device. Install Graphviz please", MessageType.WARNING)
+                .addAction(NotificationAction.createSimple("Open Graphviz") {
+                    BrowserUtil.open("https://graphviz.org/download/")
+                })
             Notifications.Bus.notify(notification, project)
         }
     }
diff --git a/src/main/kotlin/org/arend/notification/FileOutsideSourcesProvider.kt b/src/main/kotlin/org/arend/notification/FileOutsideSourcesProvider.kt
index 61b535d6e..e3d64de49 100644
--- a/src/main/kotlin/org/arend/notification/FileOutsideSourcesProvider.kt
+++ b/src/main/kotlin/org/arend/notification/FileOutsideSourcesProvider.kt
@@ -24,7 +24,7 @@ class FileOutsideSourcesProvider : EditorNotificationProvider {
             return null
         }
 
-        return Function<FileEditor, JComponent> { fileEditor: FileEditor? ->
+        return Function<FileEditor, EditorNotificationPanel?> { fileEditor: FileEditor? ->
             fileEditor?.let { createPanel(fileEditor) }
         }
     }
diff --git a/src/main/kotlin/org/arend/search/proof/ProofSearchUI.kt b/src/main/kotlin/org/arend/search/proof/ProofSearchUI.kt
index 07aacc7be..64d55de20 100644
--- a/src/main/kotlin/org/arend/search/proof/ProofSearchUI.kt
+++ b/src/main/kotlin/org/arend/search/proof/ProofSearchUI.kt
@@ -13,6 +13,7 @@ import com.intellij.codeInsight.lookup.impl.actions.ChooseItemAction
 import com.intellij.icons.AllIcons
 import com.intellij.ide.actions.BigPopupUI
 import com.intellij.openapi.actionSystem.*
+import com.intellij.openapi.actionSystem.toolbarLayout.ToolbarLayoutStrategy
 import com.intellij.openapi.application.invokeAndWaitIfNeeded
 import com.intellij.openapi.application.invokeLater
 import com.intellij.openapi.application.runInEdt
@@ -172,7 +173,7 @@ class ProofSearchUI(private val project: Project, private val caret: Caret?) : B
         actionGroup.addAction(ShowInFindWindowAction(this, project))
         actionGroup.addAction(ShowHelpAction(this))
         val toolbar = ActionManager.getInstance().createActionToolbar("proof.search.top.toolbar", actionGroup, true)
-        toolbar.layoutPolicy = ActionToolbar.NOWRAP_LAYOUT_POLICY
+        toolbar.layoutStrategy = ToolbarLayoutStrategy.NOWRAP_STRATEGY
         toolbar.targetComponent = this
         val toolbarComponent = toolbar.component
         toolbarComponent.isOpaque = false
diff --git a/src/main/kotlin/org/arend/yaml/YamlNotificationProvider.kt b/src/main/kotlin/org/arend/yaml/YamlNotificationProvider.kt
index 5b8549d07..8969fee3c 100644
--- a/src/main/kotlin/org/arend/yaml/YamlNotificationProvider.kt
+++ b/src/main/kotlin/org/arend/yaml/YamlNotificationProvider.kt
@@ -17,7 +17,7 @@ class YamlNotificationProvider : EditorNotificationProvider {
         if (!yamlFileService.containsChangedFile(virtualFile)) {
             return null
         }
-        return Function<FileEditor, JComponent> { fileEditor: FileEditor? ->
+        return Function<FileEditor, EditorNotificationPanel?> { fileEditor: FileEditor? ->
             fileEditor?.let { createPanel(yamlFileService, virtualFile, it) }
         }
     }
diff --git a/src/main/resources/META-INF/plugin.xml b/src/main/resources/META-INF/plugin.xml
index 7b9ddc4a5..09fe91ea2 100644
--- a/src/main/resources/META-INF/plugin.xml
+++ b/src/main/resources/META-INF/plugin.xml
@@ -441,7 +441,7 @@
         <liveTemplateContext contextId="AREND_STATEMENT" baseContextId="AREND" implementation="org.arend.liveTemplates.ArendTemplateContextType$Statement"/>
         <liveTemplateContext contextId="AREND_EXPRESSION" baseContextId="AREND" implementation="org.arend.liveTemplates.ArendTemplateContextType$Expression"/>
 
-        <!--TODO-->
+        <!-- Starters -->
         <appStarter id="generateArendLibHtml" implementation="org.arend.documentation.GenerateArendLibHtmlStarter"/>
 
     </extensions>