diff --git a/docker/deploy/Dockerfile b/docker/deploy/Dockerfile
index 87e341c..03108ca 100644
--- a/docker/deploy/Dockerfile
+++ b/docker/deploy/Dockerfile
@@ -1,6 +1,6 @@
 FROM rust:1.91-slim AS builder
 WORKDIR /build
-RUN apt-get update && apt-get install -y pkg-config libssl-dev && rm -rf /var/lib/apt/lists/*
+RUN apt-get update && apt-get install -y pkg-config libssl-dev g++ && rm -rf /var/lib/apt/lists/*
 
 # Copy workspace manifests first for layer caching.
 COPY Cargo.toml Cargo.lock ./