diff --git a/app/src/main/java/org/mozilla/reference/browser/NotificationManager.kt b/app/src/main/java/org/mozilla/reference/browser/NotificationManager.kt
index d46edc91a..ac07e9243 100644
--- a/app/src/main/java/org/mozilla/reference/browser/NotificationManager.kt
+++ b/app/src/main/java/org/mozilla/reference/browser/NotificationManager.kt
@@ -59,7 +59,7 @@ object NotificationManager {
                 flags = Intent.FLAG_ACTIVITY_NEW_TASK
             }
             val flags = if (SDK_INT >= Build.VERSION_CODES.S) {
-                PendingIntent.FLAG_MUTABLE or PendingIntent.FLAG_ONE_SHOT
+                PendingIntent.FLAG_IMMUTABLE or PendingIntent.FLAG_ONE_SHOT
             } else {
                 PendingIntent.FLAG_ONE_SHOT
             }
@@ -130,7 +130,7 @@ object NotificationManager {
         }
 
         val flags = if (SDK_INT >= Build.VERSION_CODES.S) {
-            PendingIntent.FLAG_MUTABLE
+            PendingIntent.FLAG_IMMUTABLE
         } else {
             0
         }
diff --git a/app/src/main/java/org/mozilla/reference/browser/components/Analytics.kt b/app/src/main/java/org/mozilla/reference/browser/components/Analytics.kt
index e271ab722..5aac22843 100644
--- a/app/src/main/java/org/mozilla/reference/browser/components/Analytics.kt
+++ b/app/src/main/java/org/mozilla/reference/browser/components/Analytics.kt
@@ -5,7 +5,6 @@
 package org.mozilla.reference.browser.components
 
 import android.app.PendingIntent
-import android.app.PendingIntent.FLAG_MUTABLE
 import android.content.Context
 import android.content.Intent
 import android.os.Build
@@ -54,7 +53,7 @@ class Analytics(private val context: Context) {
         }
 
         val flags = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
-            FLAG_MUTABLE
+            PendingIntent.FLAG_IMMUTABLE
         } else {
             0
         }