diff --git a/deploy/android_demo/build.gradle b/deploy/android_demo/build.gradle
index 95a3996127c2c641c911752103c3a01bf9d990a3..fafc1b970be053f8a9ec61f55b94cb2e85b26a33 100644
--- a/deploy/android_demo/build.gradle
+++ b/deploy/android_demo/build.gradle
@@ -7,7 +7,7 @@ buildscript {
         
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:4.0.1'
+        classpath 'com.android.tools.build:gradle:3.4.0'
         
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files
diff --git a/deploy/android_demo/gradle/wrapper/gradle-wrapper.properties b/deploy/android_demo/gradle/wrapper/gradle-wrapper.properties
index c13275e664648013ff2dfd71115c5eb037bab836..63dac4e990eb3ca985e9c1018c84f26fbab0ac78 100644
--- a/deploy/android_demo/gradle/wrapper/gradle-wrapper.properties
+++ b/deploy/android_demo/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-6.1.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.1.1-all.zip