diff --git a/app/build.gradle b/app/build.gradle
index 828016ef..3dc3e4ad 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -9,7 +9,8 @@ dependencies {
     implementation 'com.google.zxing:android-integration:3.3.0'
     implementation 'com.google.code.gson:gson:2.8.2'
     implementation 'org.mindrot:jbcrypt:0.4'
-    implementation 'com.google.guava:guava:24.1-jre'
+    // com.google.guava:guava:24.1-jre will crash on Android 5.x
+    implementation 'com.google.guava:guava:23.6-android'
     implementation 'com.annimon:stream:1.1.9'
     implementation 'com.android.volley:volley:1.1.0'
     implementation 'com.android.support.constraint:constraint-layout:1.1.3'