diff --git a/Dockerfile b/Dockerfile
index 57eb792..6a3e459 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -20,6 +20,7 @@ RUN apk add --no-cache --update\
     wget \
     unzip \
     nodejs \
+    nodejs-npm \
     openssl \
     ca-certificates \
   && pip install --upgrade pip \
diff --git a/Dockerfile.local b/Dockerfile.local
index 9a0fadf..e8b84e7 100644
--- a/Dockerfile.local
+++ b/Dockerfile.local
@@ -20,6 +20,7 @@ RUN apk add --no-cache --update\
     wget \
     unzip \
     nodejs \
+    nodejs-npm \
     openssl \
     ca-certificates \
   && pip install --upgrade pip \
diff --git a/package.json b/package.json
index 9acfca2..8d67a6e 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "o2r-loader",
-  "version": "0.5.0",
+  "version": "0.5.1",
   "description": "Node.js implementation for loading compendia and workspaces from external repositories for the [o2r web api](http://o2r.info/o2r-web-api).",
   "main": "index.js",
   "scripts": {