diff --git a/build.gradle b/build.gradle
index f994ca54..00443355 100644
--- a/build.gradle
+++ b/build.gradle
@@ -40,7 +40,7 @@ allprojects {
         catsEffectVersion = "2.5.4"
         fs2Version = "2.5.3"
         metricsVersion = "2.9.3"
-        protobufVersion = "3.21.4"
+        protobufVersion = "3.21.5"
         pureconfigVersion = "0.17.1"
         scalapbVersion = "0.11.8"
         scalapbJson4sVersion = "0.11.1"