diff --git a/build.sbt b/build.sbt
index 81759210..137b1392 100644
--- a/build.sbt
+++ b/build.sbt
@@ -9,7 +9,7 @@ import scala.util.control.NoStackTrace
 
 lazy val V =
   new {
-    val protobuf = "3.15.6"
+    val protobuf = "4.34.1"
     val protoc =
       "3.17.3" // the oldest protoc version with Apple M1 support, see https://github.com/scalapb/ScalaPB/issues/1024#issuecomment-860126568
     val coursier = "2.1.9"