diff --git a/Dockerfile b/Dockerfile
index bf42891..a4ea892 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -10,7 +10,7 @@ RUN cargo build --release
 FROM rust:1.80 AS build-cargo-local-registry
 
 # install cargo-local-registry
-RUN cargo install cargo-local-registry
+RUN cargo install --locked cargo-local-registry
 # download popular crates to local registry
 WORKDIR /local-registry
 COPY local-registry/* ./