diff --git a/backend/Dockerfile b/backend/Dockerfile
index 9801e67..9663a11 100644
--- a/backend/Dockerfile
+++ b/backend/Dockerfile
@@ -4,7 +4,7 @@ WORKDIR /app
 
 COPY requirements.txt requirements.txt
 RUN pip install --no-cache-dir -r requirements.txt
-RUN apt-get update && apt-get install tmux
+RUN apt-get update && apt-get install -y tmux
 
 COPY . .