diff --git a/rustup/Dockerfile b/rustup/Dockerfile
index c2a3332..c481223 100644
--- a/rustup/Dockerfile
+++ b/rustup/Dockerfile
@@ -9,7 +9,8 @@ RUN apt-get update && \
     apt-get install --no-install-recommends -y \
     ca-certificates curl file \
     build-essential musl-tools \
-    autoconf automake autotools-dev libtool xutils-dev && \
+    autoconf automake autotools-dev libtool xutils-dev \
+    docker && \
     rm -rf /var/lib/apt/lists/*
 
 # ENV SSL_VERSION=1.0.2u