diff --git a/conda/spleeter-cpu.yaml b/conda/spleeter-cpu.yaml
index df9ed04..5137ba8 100644
--- a/conda/spleeter-cpu.yaml
+++ b/conda/spleeter-cpu.yaml
@@ -16,3 +16,4 @@ dependencies:
     - musdb==0.3.1
     - norbert==0.2.1
     - spleeter
+    - ffmpeg-python
diff --git a/conda/spleeter-gpu.yaml b/conda/spleeter-gpu.yaml
index b269a35..094fe7d 100644
--- a/conda/spleeter-gpu.yaml
+++ b/conda/spleeter-gpu.yaml
@@ -16,4 +16,5 @@ dependencies:
     - musdb==0.3.1
     - norbert==0.2.1
     - spleeter
+    - ffmpeg-python