diff --git a/build.rs b/build.rs
index 0a1101c..7845f76 100644
--- a/build.rs
+++ b/build.rs
@@ -1,4 +1,10 @@
 fn main() -> Result<(), Box<dyn std::error::Error>> {
-    tonic_build::compile_protos("proto/nauthz.proto")?;
+    tonic_build::configure()
+        .build_server(false)
+        .protoc_arg("--experimental_allow_proto3_optional")
+        .compile(
+            &["proto/nauthz.proto"],
+            &["proto"],
+        )?;
     Ok(())
 }
diff --git a/nauthz_server_example/build.rs b/nauthz_server_example/build.rs
index b5b1f01..ef72247 100644
--- a/nauthz_server_example/build.rs
+++ b/nauthz_server_example/build.rs
@@ -1,4 +1,10 @@
 fn main() -> Result<(), Box<dyn std::error::Error>> {
-    tonic_build::compile_protos("../proto/nauthz.proto")?;
+    tonic_build::configure()
+        .build_server(false)
+        .protoc_arg("--experimental_allow_proto3_optional")
+        .compile(
+            &["../proto/nauthz.proto"],
+            &["../proto"],
+        )?;
     Ok(())
-}
+}
\ No newline at end of file