diff --git a/buildSrc/build.gradle b/buildSrc/build.gradle
index c4f1777ba06..e2c3c9dd9b5 100644
--- a/buildSrc/build.gradle
+++ b/buildSrc/build.gradle
@@ -17,6 +17,11 @@ plugins {
 }
 
 repositories {
+    if (System.getenv().containsKey("FIREBASE_CI")) {
+        maven {
+            url "http://maven-proxy/"
+        }
+    }
     maven {
         url 'https://maven.google.com/'
     }
diff --git a/root-project.gradle b/root-project.gradle
index 8afa85a592b..b7b528c49bf 100644
--- a/root-project.gradle
+++ b/root-project.gradle
@@ -18,6 +18,11 @@ import groovy.io.FileType
 buildscript {
 
     repositories {
+        if (System.getenv().containsKey("FIREBASE_CI")) {
+            maven {
+                url "http://maven-proxy/"
+            }
+        }
         google()
         jcenter()
         mavenCentral()
@@ -47,6 +52,11 @@ apply plugin: com.google.firebase.gradle.plugins.publish.PublishingPlugin
 
 configure(subprojects) {
     repositories {
+        if (System.getenv().containsKey("FIREBASE_CI")) {
+            maven {
+                url "http://maven-proxy/"
+            }
+        }
         google()
         jcenter()
         mavenLocal()
diff --git a/test-apps/build.gradle b/test-apps/build.gradle
index 10dc3ec2cd4..65caef4ea39 100644
--- a/test-apps/build.gradle
+++ b/test-apps/build.gradle
@@ -16,6 +16,11 @@
 
 buildscript {
     repositories {
+        if (System.getenv().containsKey("FIREBASE_CI")) {
+            maven {
+                url "http://maven-proxy/"
+            }
+        }
         jcenter()
         mavenLocal()
         google()
@@ -43,6 +48,11 @@ allprojects {
     }
 
     repositories {
+        if (System.getenv().containsKey("FIREBASE_CI")) {
+            maven {
+                url "http://maven-proxy/"
+            }
+        }
         //mavenLocal() can be overridden via GRADLE_OPTS="-Dmaven.repo.local=<path>"
         mavenLocal()
         jcenter()
@@ -118,4 +128,4 @@ allprojects {
 
 task clean(type: Delete) {
     delete rootProject.buildDir
-}
\ No newline at end of file
+}