diff --git a/Dockerfile b/Dockerfile
index a864b19..05b89d1 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -2,9 +2,10 @@ FROM rust:1.62 as builder
 
 ADD ./src ./builder/src
 ADD ./Cargo.toml ./builder/Cargo.toml
-ADD ./.cargo ./builder/.cargo
 ADD ./build.rs ./builder/build.rs
 
+RUN apt update && apt install -y protobuf-compiler
+
 WORKDIR /builder
 
 RUN rustup default nightly
diff --git a/build.rs b/build.rs
index 1e5220f..86d86a7 100644
--- a/build.rs
+++ b/build.rs
@@ -1,4 +1,6 @@
 fn main() -> Result<(), Box<dyn std::error::Error>> {
-    tonic_build::compile_protos("src/proto/kipdb.proto")?;
+    tonic_build::configure()
+        .protoc_arg("--experimental_allow_proto3_optional")
+        .compile(&["src/proto/kipdb.proto"], &["src/proto"])?;
     Ok(())
 }