diff --git a/gradle.properties b/gradle.properties
index 5243251..f2ba4c7 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -7,7 +7,7 @@ psiViewerVersion=221-SNAPSHOT
 pluginName_=casbin-idea-plugin
 pluginGroup=io.github.will7200.plugins.casbin
 pluginVersion=0.1.16
-pluginSinceBuild=213.*
+pluginSinceBuild=221
 pluginUntilBuild=231.*
 # Plugin Verifier integration -> https://github.com/JetBrains/gradle-intellij-plugin#plugin-verifier-dsl
 # See https://jb.gg/intellij-platform-builds-list for available build versions
diff --git a/src/kotlin/io/github/will7200/plugins/casbin/executor/CasbinDocumentManager.kt b/src/kotlin/io/github/will7200/plugins/casbin/executor/CasbinDocumentManager.kt
index 5f18731..a542dab 100644
--- a/src/kotlin/io/github/will7200/plugins/casbin/executor/CasbinDocumentManager.kt
+++ b/src/kotlin/io/github/will7200/plugins/casbin/executor/CasbinDocumentManager.kt
@@ -4,7 +4,9 @@ import com.intellij.openapi.diagnostic.Logger
 import com.intellij.openapi.editor.Document
 import com.intellij.openapi.project.Project
 import io.github.will7200.plugins.casbin.*
+import kotlinx.coroutines.ExperimentalCoroutinesApi
 
+@OptIn(ExperimentalCoroutinesApi::class)
 class CasbinDocumentManager(private val project: Project) : CasbinDocumentService() {
     private val log: Logger = Logger.getInstance(this::class.java)
     var document: Document? = null
diff --git a/src/kotlin/io/github/will7200/plugins/casbin/executor/CasbinEnforcementProducer.kt b/src/kotlin/io/github/will7200/plugins/casbin/executor/CasbinEnforcementProducer.kt
index cd8fe21..a9203f3 100644
--- a/src/kotlin/io/github/will7200/plugins/casbin/executor/CasbinEnforcementProducer.kt
+++ b/src/kotlin/io/github/will7200/plugins/casbin/executor/CasbinEnforcementProducer.kt
@@ -11,10 +11,12 @@ import io.github.will7200.plugins.casbin.CasbinExecutorRequest
 import io.github.will7200.plugins.casbin.CasbinTopics
 import io.github.will7200.plugins.casbin.language.CasbinLanguage
 import io.github.will7200.plugins.casbin.language.psi.CasbinPsiFile
+import kotlinx.coroutines.ExperimentalCoroutinesApi
 import org.casbin.jcasbin.main.Enforcer
 import java.io.File
 
 
+@OptIn(ExperimentalCoroutinesApi::class)
 class CasbinEnforcementProducer(
     private val modelPath: String?,
     private val policyFile: String?,
diff --git a/src/kotlin/io/github/will7200/plugins/casbin/executor/CasbinExecutorManager.kt b/src/kotlin/io/github/will7200/plugins/casbin/executor/CasbinExecutorManager.kt
index 7bc73a6..5e75b59 100644
--- a/src/kotlin/io/github/will7200/plugins/casbin/executor/CasbinExecutorManager.kt
+++ b/src/kotlin/io/github/will7200/plugins/casbin/executor/CasbinExecutorManager.kt
@@ -9,10 +9,12 @@ import io.github.will7200.plugins.casbin.CasbinExecutorRequest
 import io.github.will7200.plugins.casbin.CasbinExecutorService
 import io.github.will7200.plugins.casbin.CasbinTopics
 import io.github.will7200.plugins.casbin.view.ui.CasbinExecutorErrorsNotifier
+import kotlinx.coroutines.ExperimentalCoroutinesApi
 import java.time.LocalDateTime
 
 typealias EnforcerKey = Pair<String, String>
 
+@OptIn(ExperimentalCoroutinesApi::class)
 class CasbinExecutorManager(private val myProject: Project) : CasbinExecutorService() {
     private val log: Logger = Logger.getInstance(CasbinExecutorManager::class.java)
     private val enforcers: MutableUsageMap<EnforcerKey, CasbinEnforcementProducer> = MutableUsageMap()
diff --git a/src/kotlin/io/github/will7200/plugins/casbin/language/reference/CasbinUsagesProvider.kt b/src/kotlin/io/github/will7200/plugins/casbin/language/reference/CasbinUsagesProvider.kt
index 29d44c7..867f588 100644
--- a/src/kotlin/io/github/will7200/plugins/casbin/language/reference/CasbinUsagesProvider.kt
+++ b/src/kotlin/io/github/will7200/plugins/casbin/language/reference/CasbinUsagesProvider.kt
@@ -38,7 +38,7 @@ class CasbinUsagesProvider : FindUsagesProvider {
     }
 
     override fun getType(element: PsiElement): String {
-        return element.node.elementType.toString().toLowerCase()
+        return element.node.elementType.toString().lowercase()
     }
 
     override fun getHelpId(psiElement: PsiElement): String? {
diff --git a/src/kotlin/io/github/will7200/plugins/casbin/language/structure/CasbinStructureViewElement.kt b/src/kotlin/io/github/will7200/plugins/casbin/language/structure/CasbinStructureViewElement.kt
index 4352576..da76891 100644
--- a/src/kotlin/io/github/will7200/plugins/casbin/language/structure/CasbinStructureViewElement.kt
+++ b/src/kotlin/io/github/will7200/plugins/casbin/language/structure/CasbinStructureViewElement.kt
@@ -35,8 +35,8 @@ class CasbinStructureViewElement(private val element: PsiElement) : StructureVie
     }
 
     override fun getAlphaSortKey() = when (element) {
-        is PsiFile -> element.name.toLowerCase()
-        else -> element.text.toLowerCase()
+        is PsiFile -> element.name.lowercase()
+        else -> element.text.lowercase()
     }
 
     override fun canNavigate() = (element as? NavigationItem)?.canNavigate() ?: false
diff --git a/src/kotlin/io/github/will7200/plugins/casbin/view/ui/CasbinExecutorToolWindowImp.kt b/src/kotlin/io/github/will7200/plugins/casbin/view/ui/CasbinExecutorToolWindowImp.kt
index f024326..34889ec 100644
--- a/src/kotlin/io/github/will7200/plugins/casbin/view/ui/CasbinExecutorToolWindowImp.kt
+++ b/src/kotlin/io/github/will7200/plugins/casbin/view/ui/CasbinExecutorToolWindowImp.kt
@@ -10,9 +10,11 @@ import com.intellij.openapi.util.Disposer
 import com.intellij.openapi.wm.ToolWindow
 import io.github.will7200.plugins.casbin.*
 import io.github.will7200.plugins.casbin.view.editors.CasbinCSVEditor
+import kotlinx.coroutines.ExperimentalCoroutinesApi
 import java.awt.event.ItemEvent
 import javax.swing.event.DocumentEvent.EventType
 
+@OptIn(ExperimentalCoroutinesApi::class)
 class CasbinExecutorToolWindowImp(private val project: Project, private val toolWindow: ToolWindow) :
     CasbinExecutorToolWindow(project, toolWindow), CasbinExecutorConsumer {
     private val log: Logger = Logger.getInstance(CasbinExecutorToolWindowImp::class.java)
diff --git a/src/kotlin/io/github/will7200/plugins/casbincsv/language/lexer/CasbinCSVValueSeparator.kt b/src/kotlin/io/github/will7200/plugins/casbincsv/language/lexer/CasbinCSVValueSeparator.kt
index a64e26f..afe78a1 100644
--- a/src/kotlin/io/github/will7200/plugins/casbincsv/language/lexer/CasbinCSVValueSeparator.kt
+++ b/src/kotlin/io/github/will7200/plugins/casbincsv/language/lexer/CasbinCSVValueSeparator.kt
@@ -41,11 +41,11 @@ class CasbinCSVValueSeparator private constructor(
         return Objects.hash(character, isCustom)
     }
 
-    override fun equals(obj: Any?): Boolean {
-        if (obj == null || obj !is CasbinCSVValueSeparator) {
+    override fun equals(other: Any?): Boolean {
+        if (other == null || other !is CasbinCSVValueSeparator) {
             return false
         }
-        val otherObj = obj
+        val otherObj = other
         return otherObj.character == character && otherObj.isCustom == isCustom
     }