diff --git a/README.md b/README.md
index 844c2e9..d056bd7 100644
--- a/README.md
+++ b/README.md
@@ -44,6 +44,9 @@ git clone git@github.com:datproject/sdk.git
 
 cd sdk
 
+# Install dependencies
+npm install
+
 # Compile the SDK into a single JS file
 npm run build
 
diff --git a/package.json b/package.json
index 41aec45..0e66ad2 100644
--- a/package.json
+++ b/package.json
@@ -68,7 +68,8 @@
     "hyperswarm": "^2.15.2",
     "hyperswarm-web": "^2.1.1",
     "random-access-application": "^1.0.0",
-    "random-access-memory": "^3.1.1"
+    "random-access-memory": "^3.1.1",
+    "sodium-universal": "3.0.2"
   },
   "devDependencies": {
     "@babel/core": "^7.9.0",