diff --git a/aries/agents/mediator/Dockerfile b/aries/agents/mediator/Dockerfile
index c14991c19f..0251e9d190 100644
--- a/aries/agents/mediator/Dockerfile
+++ b/aries/agents/mediator/Dockerfile
@@ -7,7 +7,7 @@ RUN ls -lahF
 RUN --mount=type=cache,target=./target \
     --mount=type=cache,target=${CARGO_HOME}/git \
     --mount=type=cache,target=${CARGO_HOME}/registry \
-    cargo install --no-default-features --path=./aries/agents/mediator/ --bin mediator 
+    cargo install --no-default-features --path=./aries/agents/mediator/ --bin mediator --locked
 
 FROM debian:bookworm-slim as mediator
 RUN apt update && apt install -y libsodium23 libzmq5 && rm -rf /var/lib/apt/lists/*