diff --git a/Dockerfile b/Dockerfile
index 742607f..1a8c29b 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,8 +1,9 @@
-FROM rust:1 as builder
+FROM rust:1.68 as builder
 ARG OPENAI_KEY
 RUN apt-get update && apt-get --no-install-recommends install -y libopus-dev
 WORKDIR /usr/src/myapp
 COPY . .
+ENV CARGO_REGISTRIES_CRATES_IO_PROTOCOL=sparse
 RUN cargo install --path .
 
 FROM debian:bullseye-slim