diff --git a/build.gradle b/build.gradle
index 59e6158..fb92dc5 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,17 +1,17 @@
 buildscript {
     repositories {
-        jcenter()
+        mavenCentral()
         google()
 
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.1.0'
+        classpath 'com.android.tools.build:gradle:4.2.1'
     }
 }
 
 allprojects {
     repositories {
-        jcenter()
+        mavenCentral()
         google()
     }
 }
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index b704748..5d527a6 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
-#Tue Mar 27 00:15:43 CEST 2018
+#Mon Dec 14 15:18:57 PST 2020
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.4-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.7.1-all.zip
diff --git a/release.sh b/release.sh
old mode 100644
new mode 100755
index ae15125..2194938
--- a/release.sh
+++ b/release.sh
@@ -51,4 +51,4 @@ git tag ${VERSION}
 git push origin master
 git push --tags
 
-echo "UsbSerial: Release Finished!!!"
\ No newline at end of file
+echo "UsbSerial: Release Finished!!!"