diff --git a/build.gradle b/build.gradle
index b0f7b8ae..75ec79af 100644
--- a/build.gradle
+++ b/build.gradle
@@ -30,7 +30,7 @@ plugins {
 }
 
 ext {
-    grpcVersion = '1.65.1'
+    grpcVersion = '1.66.0'
     protoVersion = '3.25.3'
     containerVersion = '1.20.1'
     kafkaVersion = "7.7.0-ce"
diff --git a/contract/build.gradle b/contract/build.gradle
index 56c6038d..eac912af 100644
--- a/contract/build.gradle
+++ b/contract/build.gradle
@@ -29,7 +29,7 @@ plugins {
 }
 
 ext {
-    grpcVersion = '1.65.1'
+    grpcVersion = '1.66.0'
     protoVersion = '3.25.3'
 }