diff --git a/.idea/compiler.xml b/.idea/compiler.xml
index e78dd81..91bada8 100644
--- a/.idea/compiler.xml
+++ b/.idea/compiler.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
   <component name="CompilerConfiguration">
-    <bytecodeTargetLevel target="1.8">
+    <bytecodeTargetLevel target="14">
       <module name="apn-jwt.main" target="1.8" />
       <module name="apn-jwt.test" target="1.8" />
     </bytecodeTargetLevel>
diff --git a/.idea/jarRepositories.xml b/.idea/jarRepositories.xml
index fdc392f..d20b597 100644
--- a/.idea/jarRepositories.xml
+++ b/.idea/jarRepositories.xml
@@ -16,5 +16,10 @@
       <option name="name" value="MavenRepo" />
       <option name="url" value="https://repo.maven.apache.org/maven2/" />
     </remote-repository>
+    <remote-repository>
+      <option name="id" value="MavenLocal" />
+      <option name="name" value="MavenLocal" />
+      <option name="url" value="file:$MAVEN_REPOSITORY$/" />
+    </remote-repository>
   </component>
 </project>
\ No newline at end of file
diff --git a/.idea/misc.xml b/.idea/misc.xml
index 655dfee..5afdd25 100644
--- a/.idea/misc.xml
+++ b/.idea/misc.xml
@@ -7,7 +7,7 @@
   <component name="JavaScriptSettings">
     <option name="languageLevel" value="ES6" />
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" project-jdk-name="13.0.1" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_14" default="true" project-jdk-name="14" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>
\ No newline at end of file
diff --git a/.idea/workspace.xml b/.idea/workspace.xml
index 85724c5..3a31c6f 100644
--- a/.idea/workspace.xml
+++ b/.idea/workspace.xml
@@ -46,7 +46,7 @@
   <component name="PropertiesComponent">
     <property name="WebServerToolWindowFactoryState" value="false" />
     <property name="last_opened_file_path" value="$PROJECT_DIR$" />
-    <property name="project.structure.last.edited" value="Modules" />
+    <property name="project.structure.last.edited" value="SDKs" />
     <property name="project.structure.proportion" value="0.0" />
     <property name="project.structure.side.proportion" value="0.2" />
     <property name="settings.editor.selected.configurable" value="reference.settingsdialog.project.gradle" />
@@ -127,6 +127,7 @@
       <workItem from="1580198778394" duration="73000" />
       <workItem from="1580198880216" duration="3739000" />
       <workItem from="1646058684704" duration="3926000" />
+      <workItem from="1646302868074" duration="708000" />
     </task>
     <servers />
   </component>
diff --git a/build.gradle b/build.gradle
deleted file mode 100644
index bbe7d59..0000000
--- a/build.gradle
+++ /dev/null
@@ -1,28 +0,0 @@
-plugins {
-    id 'java'
-    id 'org.jetbrains.kotlin.jvm' version '1.3.31'
-}
-
-group 'com.philjay.jwt'
-version '1.2.0'
-
-sourceCompatibility = 1.8
-
-repositories {
-    mavenCentral()
-}
-
-dependencies {
-    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8"
-    testCompile group: 'junit', name: 'junit', version: '4.12'
-
-    testCompile 'com.google.code.gson:gson:2.9.0'
-    testCompile 'commons-codec:commons-codec:1.14'
-}
-
-compileKotlin {
-    kotlinOptions.jvmTarget = "1.8"
-}
-compileTestKotlin {
-    kotlinOptions.jvmTarget = "1.8"
-}
\ No newline at end of file
diff --git a/build.gradle.kts b/build.gradle.kts
new file mode 100644
index 0000000..5494e7b
--- /dev/null
+++ b/build.gradle.kts
@@ -0,0 +1,26 @@
+plugins {
+    java
+    kotlin("jvm") version "1.6.0"
+}
+
+group = "com.philjay.jwt"
+version = "1.2.1"
+description = "JWT"
+java.sourceCompatibility = JavaVersion.VERSION_14
+
+repositories {
+    mavenLocal()
+    mavenCentral()
+}
+
+dependencies {
+    testImplementation("junit:junit:4.13.2")
+    testImplementation("com.google.code.gson:gson:2.9.0")
+    testImplementation("commons-codec:commons-codec:1.14")
+}
+
+tasks.withType<org.jetbrains.kotlin.gradle.tasks.KotlinCompile> {
+    kotlinOptions {
+        jvmTarget = "14"
+    }
+}
\ No newline at end of file
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index a392fc8..acb687f 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -3,4 +3,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.10.3-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.0.2-all.zip