diff --git a/scripts/docker/Dockerfile.dj b/scripts/docker/Dockerfile.dj
index 81fdf539..cef184d7 100644
--- a/scripts/docker/Dockerfile.dj
+++ b/scripts/docker/Dockerfile.dj
@@ -15,6 +15,7 @@ RUN     apk add -U !pyc \
             py3-jinja2 py3-argon2-cffi py3-pyzmq py3-pillow \
             py3-pip py3-cffi \
             ffmpeg \
+            py3-magic \
             vips-jxl vips-heif vips-poppler vips-magick \
             py3-numpy fftw libsndfile \
             vamp-sdk vamp-sdk-libs \
diff --git a/scripts/docker/Dockerfile.iv b/scripts/docker/Dockerfile.iv
index d6235004..5208ea18 100644
--- a/scripts/docker/Dockerfile.iv
+++ b/scripts/docker/Dockerfile.iv
@@ -12,6 +12,7 @@ RUN     apk add -U !pyc \
             py3-jinja2 py3-argon2-cffi py3-pyzmq py3-pillow \
             py3-pip py3-cffi \
             ffmpeg \
+            py3-magic \
             vips-jxl vips-heif vips-poppler vips-magick \
         && apk add -t .bd \
             bash wget gcc g++ make cmake patchelf \