diff --git a/docker/cpu/python-3.6.dockerfile b/docker/cpu/python-3.6.dockerfile
index a10868d..0f23184 100644
--- a/docker/cpu/python-3.6.dockerfile
+++ b/docker/cpu/python-3.6.dockerfile
@@ -1,6 +1,6 @@
 FROM python:3.6
 
-RUN apt-get update && apt-get install -y ffmpeg libsndfile
+RUN apt-get update && apt-get install -y ffmpeg libsndfile1
 RUN pip install musdb museval
 RUN pip install spleeter
 RUN mkdir -p /model
diff --git a/docker/cpu/python-3.7.dockerfile b/docker/cpu/python-3.7.dockerfile
index f900683..33bdcbc 100644
--- a/docker/cpu/python-3.7.dockerfile
+++ b/docker/cpu/python-3.7.dockerfile
@@ -1,6 +1,6 @@
 FROM python:3.7
 
-RUN apt-get update && apt-get install -y ffmpeg libsndfile
+RUN apt-get update && apt-get install -y ffmpeg libsndfile1
 RUN pip install musdb museval
 RUN pip install spleeter
 RUN mkdir -p /model