diff --git a/imageclassifier-add-camera/app/build.gradle b/imageclassifier-add-camera/app/build.gradle
index f584989..64d69f4 100644
--- a/imageclassifier-add-camera/app/build.gradle
+++ b/imageclassifier-add-camera/app/build.gradle
@@ -49,5 +49,6 @@ android {
 dependencies {
     compileOnly 'com.google.android.things:androidthings:+'
     implementation 'com.google.android.things.contrib:driver-rainbowhat:+'
+    implementation 'com.android.support:support-annotations:27.1.0'
     implementation 'org.tensorflow:tensorflow-lite:0.1.1'
 }
diff --git a/imageclassifier-add-intelligence/app/build.gradle b/imageclassifier-add-intelligence/app/build.gradle
index f584989..64d69f4 100644
--- a/imageclassifier-add-intelligence/app/build.gradle
+++ b/imageclassifier-add-intelligence/app/build.gradle
@@ -49,5 +49,6 @@ android {
 dependencies {
     compileOnly 'com.google.android.things:androidthings:+'
     implementation 'com.google.android.things.contrib:driver-rainbowhat:+'
+    implementation 'com.android.support:support-annotations:27.1.0'
     implementation 'org.tensorflow:tensorflow-lite:0.1.1'
 }
diff --git a/imageclassifier-start/app/build.gradle b/imageclassifier-start/app/build.gradle
index c1baffb..2f5930e 100644
--- a/imageclassifier-start/app/build.gradle
+++ b/imageclassifier-start/app/build.gradle
@@ -49,5 +49,6 @@ android {
 dependencies {
     compileOnly 'com.google.android.things:androidthings:+'
     implementation 'com.google.android.things.contrib:driver-rainbowhat:+'
+    implementation 'com.android.support:support-annotations:27.1.0'
     // TODO: ADD ARTIFICIAL INTELLIGENCE
 }