diff --git a/pom.xml b/pom.xml
index 5b7bb6c66d..2bc01123c6 100644
--- a/pom.xml
+++ b/pom.xml
@@ -43,7 +43,7 @@
     <snakeyaml.version>1.28</snakeyaml.version>
     <slf4j.version>1.7.30</slf4j.version>
     <caffeine.version>2.9.0</caffeine.version>
-    <protobuf.version>3.15.5</protobuf.version>
+    <protobuf.version>3.15.6</protobuf.version>
     <junit.version>4.13</junit.version>
     <bucket4j.version>6.0.1</bucket4j.version>
     <bouncycastle.version>1.68</bouncycastle.version>