diff --git a/Dockerfile b/Dockerfile
index f1400a7..4892102 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -68,6 +68,7 @@ RUN echo \
       unzip \
       zip \
       zlib1g \
+      zlib1g-dev \
  && fc-cache -f \
  && apt-get autoremove --purge -y \
  && apt-get autoclean -y \
diff --git a/install_R.sh b/install_R.sh
index e0a84b9..2dbb48c 100755
--- a/install_R.sh
+++ b/install_R.sh
@@ -33,8 +33,7 @@ BUILDDEPS="curl \
   xauth \
   xfonts-base \
   xvfb \
-  wget \
-  zlib1g-dev"
+  wget"
 
 apt-get update && apt-get install -y --no-install-recommends $BUILDDEPS