diff --git a/Dockerfile b/Dockerfile
index 3a1ce53..6b73803 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -13,6 +13,7 @@ RUN set -eu && \
     apt-get update && \
     apt-get --no-install-recommends -y install \
         samba \
+        python3 \
         wimtools \
         dos2unix \
         cabextract \