diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 6d05c299..0afeaad4 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -2,6 +2,8 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools">
 
+    <uses-sdk tools:overrideLibrary="androidx.camera.video, androidx.camera.camera2, androidx.camera.lifecycle, androidx.camera.view, androidx.camera.core" />
+
     <uses-permission android:name="android.permission.CAMERA" />
     <uses-permission android:name="android.permission.USE_BIOMETRIC" />
     <uses-permission android:name="android.permission.VIBRATE" />
diff --git a/app/src/main/java/com/beemdevelopment/aegis/ui/MainActivity.java b/app/src/main/java/com/beemdevelopment/aegis/ui/MainActivity.java
index 592d15d7..fd453b50 100644
--- a/app/src/main/java/com/beemdevelopment/aegis/ui/MainActivity.java
+++ b/app/src/main/java/com/beemdevelopment/aegis/ui/MainActivity.java
@@ -240,10 +240,15 @@ public class MainActivity extends AegisActivity implements EntryListView.Listene
                  dialog.dismiss();
                  startScanImageActivity();
              });
-             view.findViewById(R.id.fab_scan).setOnClickListener(v3 -> {
-                 dialog.dismiss();
-                 startScanActivity();
-             });
+             View fabScan = view.findViewById(R.id.fab_scan);
+             if (android.os.Build.VERSION.SDK_INT < 21) {
+                 fabScan.setVisibility(View.GONE);
+             } else {
+                 fabScan.setOnClickListener(v3 -> {
+                     dialog.dismiss();
+                     startScanActivity();
+                 });
+             }
 
              Dialogs.showSecureDialog(dialog);
          });
@@ -805,7 +810,9 @@ public class MainActivity extends AegisActivity implements EntryListView.Listene
 
         switch (action) {
             case "scan":
-                startScanActivity();
+                if (android.os.Build.VERSION.SDK_INT >= 21) {
+                    startScanActivity();
+                }
                 break;
         }
 
diff --git a/app/src/main/java/com/beemdevelopment/aegis/ui/ScannerActivity.java b/app/src/main/java/com/beemdevelopment/aegis/ui/ScannerActivity.java
index cc0d6095..16fcdee1 100644
--- a/app/src/main/java/com/beemdevelopment/aegis/ui/ScannerActivity.java
+++ b/app/src/main/java/com/beemdevelopment/aegis/ui/ScannerActivity.java
@@ -33,6 +33,7 @@ import java.util.concurrent.ExecutionException;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
 
+@androidx.annotation.RequiresApi(21)
 public class ScannerActivity extends AegisActivity implements QrCodeAnalyzer.Listener {
     private ProcessCameraProvider _cameraProvider;
     private ListenableFuture<ProcessCameraProvider> _cameraProviderFuture;
@@ -52,6 +53,13 @@ public class ScannerActivity extends AegisActivity implements QrCodeAnalyzer.Lis
     @Override
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
+
+        if (android.os.Build.VERSION.SDK_INT < 21) {
+            Toast.makeText(this, R.string.camera_not_supported, Toast.LENGTH_LONG).show();
+            finish();
+            return;
+        }
+
         if (abortIfOrphan(savedInstanceState)) {
             return;
         }
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 9014aa46..a0f7665f 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -619,4 +619,5 @@
         <item quantity="one">%d item selected</item>
         <item quantity="other">%d items selected</item>
     </plurals>
+    <string name="camera_not_supported">Camera is not supported on this device.</string>
 </resources>