diff --git a/build.gradle b/build.gradle
index 31175b4..7baeaa3 100644
--- a/build.gradle
+++ b/build.gradle
@@ -3,23 +3,17 @@ buildscript {
 
     repositories {
         mavenCentral()
-        maven { url 'https://jitpack.io'}
-        maven {
-            url "https://oss.sonatype.org/content/repositories/snapshots/"
-        }
-        maven {
-            url 'https://dl.bintray.com/jetbrains/intellij-plugin-service'
-        }
     }
 
     dependencies {
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
+        classpath "it.unimi.dsi:fastutil:8.5.9"
     }
 }
 
 plugins {
-    id "org.jetbrains.intellij" version "0.5.0"
-    id "org.jetbrains.grammarkit" version "2020.2.1"
+    id "org.jetbrains.intellij" version "1.9.0"
+    id "org.jetbrains.grammarkit" version "2021.1.3"
 }
 
 group 'com.interfaced'
@@ -39,7 +33,9 @@ sourceSets {
 sourceCompatibility = 1.8
 
 grammarKit {
-    jflexRelease = '1.7.0'
+    jflexRelease = "1.7.0-1"
+    grammarKitRelease = "2021.1.2"
+//    intellijRelease = "203.7717.81"
 }
 
 repositories {
@@ -47,25 +43,22 @@ repositories {
 }
 
 dependencies {
-    compile group: 'org.jetbrains.kotlin', name: 'kotlin-stdlib', version: '1.3.72'
-    testCompile group: 'junit', name: 'junit', version: '4.12'
+    implementation group: 'org.jetbrains.kotlin', name: 'kotlin-stdlib', version: '1.3.72'
+    testImplementation group: 'junit', name: 'junit', version: '4.12'
     testImplementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7"
 }
 
 intellij {
-    pluginName 'BrightScript'
-    type 'IC'
-    version '2020.2.3'
+    version.set("2021.3")
+    type.set("IC") // Target IDE Platform
+
+//    plugins.set(listOf(/* Plugin Dependencies */))
 }
 
 patchPluginXml {
-    changeNotes """
-      <ul>
-        <li>Support for 2020.2</li>
-      </ul>
-      """
 }
 
+
 import org.jetbrains.grammarkit.tasks.*
 
 def GENERATE_GROUP = 'Generate'
@@ -91,7 +84,7 @@ task generateParser(type: GenerateParser) {
     description = 'Generate Parser Java sources for BrightScript'
     group = GENERATE_GROUP
 
-    // patch up to date check
+//     patch up to date check
     outputs.upToDateWhen { false }
 }
 
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index a6c9c58..ae04661 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,5 @@
-#Fri Oct 12 19:47:20 GMT+07:00 2018
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.5.1-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.5.1-all.zip