diff --git a/index.ios.js b/index.ios.js
index a62de4618..851a2d7c2 100644
--- a/index.ios.js
+++ b/index.ios.js
@@ -6,7 +6,6 @@ import './shim';
 import App from './app/components/App';
 
 global.platform = 'ios';
-global.DOMPurify = require('dompurify');
 
 const nicebear = () => (
     <App />
diff --git a/package.json b/package.json
index 1adca8c19..19e313498 100644
--- a/package.json
+++ b/package.json
@@ -3,10 +3,10 @@
   "version": "3.133.0",
   "private": true,
   "scripts": {
-    "postinstall": "sh scripts/setup-env.sh && npm run icebear:compile && rn-nodeify --install 'crypto, stream, process, events, vm' --hack && bash scripts/setup-rn-debugging.sh && bash scripts/copy-android-resources.sh && bash scripts/android-switch-to-rn-fork.sh",
+    "postinstall": "sh scripts/setup-env.sh && npm run icebear:compile && bash scripts/setup-rn-debugging.sh && bash scripts/copy-android-resources.sh && bash scripts/android-switch-to-rn-fork.sh",
     "commit": "git-cz",
     "code:packager": "./node_modules/react-native/packager/packager.sh --reset-cache",
-    "icebear:compile": "babel node_modules/@peerio/peerio-icebear/src -d app/lib/peerio-icebear",
+    "icebear:compile": "babel node_modules/@peerio/peerio-icebear/src -d app/lib/peerio-icebear && bash ./scripts/remove-require-crypto.sh",
     "icebear:watch": "npm run icebear:compile -- -w",
     "start": "source env.sh && npm-run-all -l -p icebear:watch code:packager",
     "expandoo": "source env-expandoo.sh && ./node_modules/react-native/packager/packager.sh --reset-cache",
@@ -41,7 +41,6 @@
     "bluebird": "3.5.0",
     "buffer": "5.0.6",
     "capitalize": "^1.0.0",
-    "dompurify": "^0.9.0",
     "eventemitter3": "2.0.3",
     "events": "1.1.1",
     "file-loader": "0.9.0",
@@ -70,7 +69,6 @@
     "react-native-billing": "2.3.0",
     "react-native-cli": "2.0.1",
     "react-native-contacts": "git+https://github.com/PeerioTechnologies/react-native-contacts.git",
-    "react-native-crypto": "2.0.1",
     "react-native-device-info": "git+https://github.com/PeerioTechnologies/react-native-device-info.git",
     "react-native-file-opener": "git+https://github.com/PeerioTechnologies/react-native-file-opener.git",
     "react-native-file-picker": "0.0.8",
@@ -91,13 +89,9 @@
     "react-native-sound": "0.9.0",
     "react-native-sqlcipher-storage": "git+ssh://git@github.com/PeerioTechnologies/react-native-sqlcipher-storage.git",
     "react-native-vector-icons": "4.0.0",
-    "readable-stream": "1.0.33",
-    "rn-workers": "git+https://github.com/PeerioTechnologies/react-native-workers.git",
     "scrypt-async": "1.3.1",
     "socket.io-client": "^2.0.3",
-    "stream-browserify": "1.0.0",
-    "tweetnacl": "1.0.0",
-    "vm-browserify": "0.0.4"
+    "tweetnacl": "1.0.0"
   },
   "devDependencies": {
     "appium": "1.6.5",
@@ -121,7 +115,6 @@
     "npm-run-all": "^4.0.2",
     "opt-cli": "^1.5.2",
     "repeating-cli": "^2.0.0",
-    "rn-nodeify": "github:mvayngrib/rn-nodeify",
     "semantic-release": "6.3.2",
     "sinon": "^1.17.7",
     "sinon-chai": "^2.13.0",
@@ -151,26 +144,6 @@
       "helpMessage": "Convention: https://goo.gl/3TgTsh"
     }
   },
-  "react-native": {
-    "crypto": "react-native-crypto",
-    "_stream_transform": "readable-stream/transform",
-    "_stream_readable": "readable-stream/readable",
-    "_stream_writable": "readable-stream/writable",
-    "_stream_duplex": "readable-stream/duplex",
-    "_stream_passthrough": "readable-stream/passthrough",
-    "stream": "stream-browserify",
-    "vm": "vm-browserify"
-  },
-  "browser": {
-    "crypto": "react-native-crypto",
-    "_stream_transform": "readable-stream/transform",
-    "_stream_readable": "readable-stream/readable",
-    "_stream_writable": "readable-stream/writable",
-    "_stream_duplex": "readable-stream/duplex",
-    "_stream_passthrough": "readable-stream/passthrough",
-    "stream": "stream-browserify",
-    "vm": "vm-browserify"
-  },
   "standard-version": {
     "skip": {
       "changelog": true
diff --git a/scripts/remove-require-crypto.sh b/scripts/remove-require-crypto.sh
new file mode 100755
index 000000000..0aa3ed97b
--- /dev/null
+++ b/scripts/remove-require-crypto.sh
@@ -0,0 +1,4 @@
+#!/bin/bash
+echo "Removing require('crypto') references"
+perl -pi -e 's/require\(.crypto.\)/null/g' app/lib/peerio-icebear/crypto/util.random.js
+perl -pi -e 's/require\(.crypto.\)/null/g' node_modules/sjcl/sjcl.js
diff --git a/shim.js b/shim.js
index 2b8126d46..0012321a7 100644
--- a/shim.js
+++ b/shim.js
@@ -45,10 +45,9 @@ global.WebSocket = function(url) {
     return r;
 };
 
-const cryptoShim = require('react-native-crypto');
-global.cryptoShim = cryptoShim;
+const { randomBytes } = require('react-native-randombytes');
+global.cryptoShim = { randomBytes };
 
-const randomBytes = cryptoShim.randomBytes;
 console.log(`shim.js: checking randomBytes`);
 console.log(randomBytes(8));
 
@@ -177,4 +176,4 @@ if (!String.fromCodePoint) {
 			String.fromCodePoint = fromCodePoint;
 		}
 	}());
-}
\ No newline at end of file
+}