diff --git a/build.gradle b/build.gradle
index 1dd5e30..7520f1b 100644
--- a/build.gradle
+++ b/build.gradle
@@ -37,7 +37,7 @@ allprojects {
     versions = [
       wiremock: "3.10.0",
       grpc    : "1.70.0",
-      protobuf: "3.25.5"
+      protobuf: "3.25.6"
     ]
 
     repoUser = this.hasProperty('sonatypeUser') ? sonatypeUser : 'default'
diff --git a/wiremock-grpc-extension-jetty12/build.gradle b/wiremock-grpc-extension-jetty12/build.gradle
index 6c7119a..62098a3 100644
--- a/wiremock-grpc-extension-jetty12/build.gradle
+++ b/wiremock-grpc-extension-jetty12/build.gradle
@@ -120,7 +120,7 @@ test {
 
 protobuf {
   protoc {
-    artifact = "com.google.protobuf:protoc:4.27.5"
+    artifact = "com.google.protobuf:protoc:3.25.6"
   }
 
   plugins {
diff --git a/wiremock-grpc-extension-standalone/build.gradle b/wiremock-grpc-extension-standalone/build.gradle
index c80f82c..0100116 100644
--- a/wiremock-grpc-extension-standalone/build.gradle
+++ b/wiremock-grpc-extension-standalone/build.gradle
@@ -156,7 +156,7 @@ shadowJar {
 
 protobuf {
   protoc {
-    artifact = "com.google.protobuf:protoc:4.27.5"
+    artifact = "com.google.protobuf:protoc:3.25.6"
   }
 
   plugins {