diff --git a/app/build.gradle b/app/build.gradle
index e7f2d63f2d..c834c2ac04 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -199,6 +199,7 @@ dependencies {
     implementation(name: "android-edittext-validator-v1.3.4-mod", ext: "aar")
     implementation(name: "sightparser-release", ext: "aar")
     implementation 'com.madgag.spongycastle:core:1.58.0.0'
+    implementation 'com.android.support.constraint:constraint-layout:1.1.3'
 
     implementation("com.google.android:flexbox:0.3.0") {
         exclude group: "com.android.support"