diff --git a/sea.js b/sea.js
index 3030cd68..2d06f480 100644
--- a/sea.js
+++ b/sea.js
@@ -170,7 +170,7 @@
     var o = {};
 
     if(SEA.window){
-      api.crypto = window.crypto || window.msCrypto || require('isomorphic-webcrypto');
+      api.crypto = navigator && navigator.product === 'ReactNative' ? require('isomorphic-webcrypto') : window.crypto || window.msCrypto || require('isomorphic-webcrypto');
       api.subtle = (api.crypto||o).subtle || (api.crypto||o).webkitSubtle;
       api.TextEncoder = window.TextEncoder;
       api.TextDecoder = window.TextDecoder;
diff --git a/sea/pair.js b/sea/pair.js
index 75e7f098..b01aad31 100644
--- a/sea/pair.js
+++ b/sea/pair.js
@@ -39,7 +39,7 @@
       // Next: ECDH keys for encryption/decryption...
 
       try{
-      var dh = await ecdhSubtle.generateKey({name: 'ECDH', namedCurve: 'P-256'};, true, ['deriveKey'])
+      var dh = await ecdhSubtle.generateKey({name: 'ECDH', namedCurve: 'P-256'}, true, ['deriveKey'])
       .then(async (keys) => {
         // privateKey scope doesn't leak out from here!
         var key = {};
diff --git a/sea/secret.js b/sea/secret.js
index 5108707d..1e3e3272 100644
--- a/sea/secret.js
+++ b/sea/secret.js
@@ -13,7 +13,7 @@
       var epriv = pair.epriv;
       var ecdhSubtle = shim.ossl || shim.subtle;
       var pubKeyData = keysToEcdhJwk(pub);
-      var props = Object.assign({ public: await ecdhSubtle.importKey(...pubKeyData, true, []) },{name: 'ECDH', namedCurve: 'P-256'};); // Thanks to @sirpy !
+      var props = Object.assign({ public: await ecdhSubtle.importKey(...pubKeyData, true, []) },{name: 'ECDH', namedCurve: 'P-256'}); // Thanks to @sirpy !
       var privKeyData = keysToEcdhJwk(epub, epriv);
       var derived = await ecdhSubtle.importKey(...privKeyData, false, ['deriveBits']).then(async (privKey) => {
         // privateKey scope doesn't leak out from here!
@@ -44,7 +44,7 @@
           jwk,
           { x: x, y: y, kty: 'EC', crv: 'P-256', ext: true }
         ), // ??? refactor
-        {name: 'ECDH', namedCurve: 'P-256'};
+        {name: 'ECDH', namedCurve: 'P-256'}
       ]
     }
 
diff --git a/sea/shim.js b/sea/shim.js
index 42716477..66a69fbe 100644
--- a/sea/shim.js
+++ b/sea/shim.js
@@ -5,7 +5,7 @@
     var o = {};
 
     if(SEA.window){
-      api.crypto = window.crypto || window.msCrypto || require('isomorphic-webcrypto');
+      api.crypto = navigator && navigator.product === 'ReactNative' ? require('isomorphic-webcrypto') : window.crypto || window.msCrypto || require('isomorphic-webcrypto');
       api.subtle = (api.crypto||o).subtle || (api.crypto||o).webkitSubtle;
       api.TextEncoder = window.TextEncoder;
       api.TextDecoder = window.TextDecoder;