diff --git a/.gitignore b/.gitignore
index fc5d2fd4..eac83679 100644
--- a/.gitignore
+++ b/.gitignore
@@ -7,6 +7,8 @@
 /gentest/test.html
 .buckversion
 .cxx
+.idea
+./local.properties
 
 # Jekyll
 /.sass-cache/
diff --git a/build.gradle b/build.gradle
index 7b09a84f..2b8ee97e 100644
--- a/build.gradle
+++ b/build.gradle
@@ -13,7 +13,6 @@ buildscript {
         mavenCentral()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.1.0'
         classpath 'com.android.tools.build:gradle:4.2.1'
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files