diff --git a/services/tunnelbroker/Dockerfile b/services/tunnelbroker/Dockerfile
--- a/services/tunnelbroker/Dockerfile
+++ b/services/tunnelbroker/Dockerfile
@@ -15,7 +15,7 @@
 
 COPY shared ../../shared/
 
-RUN cargo install --path .
+RUN cargo install --locked --path .
 
 FROM debian:bullseye-slim as runner