diff --git a/Dockerfile b/Dockerfile
index b2c0c8d..0f8a9bb 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -12,6 +12,7 @@ RUN npx tsc -p tsconfig.build.json
 
 # ---- runtime ----
 FROM node:lts-alpine AS runner
+RUN apk add --no-cache ffmpeg
 WORKDIR /app
 
 ENV NODE_ENV=production
diff --git a/Dockerfile-bun b/Dockerfile-bun
index f7455c5..842d91c 100644
--- a/Dockerfile-bun
+++ b/Dockerfile-bun
@@ -12,6 +12,7 @@ RUN bunx tsc -p tsconfig.build.json
 
 # ---- runtime ----
 FROM oven/bun:alpine AS runner
+RUN apk add --no-cache ffmpeg
 WORKDIR /app
 
 ENV NODE_ENV=production