diff --git a/Dockerfile b/Dockerfile
index bbf4cc4..00a3d44 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -23,7 +23,7 @@ RUN apt-get update && apt-get install -y \
     
 #redland install (for atom4R/zen4R)
 RUN install2.r --error --skipinstalled --ncpus -1 redland
-apt_install \
+RUN apt_install \
     libcurl4-openssl-dev \
     libgit2-dev \
     libxslt-dev \