diff --git a/Dockerfile b/Dockerfile
index 142cc6f..c7ced38 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -4,15 +4,15 @@ FROM python:3.13-slim
 # Set working directory
 WORKDIR /app
 
-# Install system dependencies
-# Note: LibreOffice is excluded from the base image to reduce size (~500MB)
-# It can be installed on-demand via the Admin Panel → System Dependencies
+# Install system dependencies including LibreOffice for PPTX conversion
 RUN apt-get update && apt-get install -y \
     poppler-utils \
     ffmpeg \
     libmagic1 \
     sudo \
     fonts-noto-color-emoji \
+    libreoffice \
+    libreoffice-impress \
     && rm -rf /var/lib/apt/lists/*
 
 # Copy requirements first for better caching