diff --git a/app/build.gradle b/app/build.gradle
index 8759ccd0f5..00c679b9e9 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -2,7 +2,7 @@ import org.mozilla.fenix.gradle.tasks.ApkSizeTask
 
 plugins {
     id "com.jetbrains.python.envs" version "0.0.26"
-    id "com.google.protobuf" version "0.8.17"
+    id "com.google.protobuf" version "0.8.19"
 }
 
 apply plugin: 'com.android.application'
diff --git a/buildSrc/src/main/java/Dependencies.kt b/buildSrc/src/main/java/Dependencies.kt
index 6055ee6052..877cb291d9 100644
--- a/buildSrc/src/main/java/Dependencies.kt
+++ b/buildSrc/src/main/java/Dependencies.kt
@@ -59,7 +59,7 @@ object Versions {
 
     const val google_play_store_version = "1.8.0"
 
-    const val protobuf = "3.11.4" // keep in sync with the version used in AS.
+    const val protobuf = "3.21.6" // keep in sync with the version used in AS.
 }
 
 @Suppress("unused")