diff --git a/build.gradle b/build.gradle
index 2e572a06..6614de1a 100644
--- a/build.gradle
+++ b/build.gradle
@@ -83,8 +83,8 @@ tasks.sourcesJar {
 // All it does is complain about generated code.
 javadoc { options.addStringOption('Xdoclint:none', '-quiet') }
 
-def grpcVersion = "1.72.0"
-def protocVersion = "4.30.2"
+def grpcVersion = "1.73.0"
+def protocVersion = "4.31.1"
 def authzedProtoCommit = "v1.41.0"
 def bufDir = "${buildDir}/buf"
 def protocPlatformTag = project.findProperty('protoc_platform') ? ":${protoc_platform}" : ""