diff --git a/voice_conversion/so-vits-svc-paul/Dockerfile b/voice_conversion/so-vits-svc-paul/Dockerfile
index 3b9906e..7f6c48d 100644
--- a/voice_conversion/so-vits-svc-paul/Dockerfile
+++ b/voice_conversion/so-vits-svc-paul/Dockerfile
@@ -1,18 +1,21 @@
 FROM nvidia/cuda:12.0.1-runtime-ubuntu22.04
 
 ENV DEBIAN_FRONTEND=noninteractive
+
+# NB: ffmpeg for transcoding opus -> wav
 RUN apt-get update && apt-get install -y \
     build-essential \
-    nvidia-driver-515 \
-    python3.10 \
-    python3-pip \
-    python3.10-venv \
-    python3.10-dev \
-    vim \
     curl \
-    wget \
+    ffmpeg \
     htop \
     libsndfile1 \
+    nvidia-driver-515 \
+    python3-pip \
+    python3.10 \
+    python3.10-dev \
+    python3.10-venv \
+    vim \
+    wget \
     --no-install-recommends \
     && apt-get clean autoclean && apt-get autoremove -y && rm -rf /var/lib/{apt,dpkg,cache,log}/