diff --git a/Dockerfile b/Dockerfile
index e2328a8..aa4793f 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -12,7 +12,7 @@ ARG APP_NAME=mastodon-image-uploader-bot
 FROM rust:${RUST_VERSION}-slim-bullseye AS build
 ARG APP_NAME
 WORKDIR /app
-RUN apt update && apt install pkg-config openssl -y
+RUN apt update && apt install pkg-config openssl libssl-dev -y
 # Build the application.
 # Leverage a cache mount to /usr/local/cargo/registry/
 # for downloaded dependencies and a cache mount to /app/target/ for