diff --git a/app/scripts/controllers/preferences.js b/app/scripts/controllers/preferences.js
index b21cdfb36..2faf8220b 100644
--- a/app/scripts/controllers/preferences.js
+++ b/app/scripts/controllers/preferences.js
@@ -408,7 +408,11 @@ class PreferencesController {
       rpcList.splice(index, 1)
     }
     if (url !== 'http://localhost:8545') {
-      rpcList.push({ rpcUrl: url, chainId, ticker, nickname })
+      let checkedChainId
+      if (!!chainId && !Number.isNaN(parseInt(chainId))) {
+        checkedChainId = chainId
+      }
+      rpcList.push({ rpcUrl: url, chainId: checkedChainId, ticker, nickname })
     }
     this.store.updateState({ frequentRpcListDetail: rpcList })
     return Promise.resolve(rpcList)
diff --git a/app/scripts/migrations/030.js b/app/scripts/migrations/030.js
new file mode 100644
index 000000000..19b686c58
--- /dev/null
+++ b/app/scripts/migrations/030.js
@@ -0,0 +1,47 @@
+// next version number
+const version = 30
+
+/*
+
+removes invalid chaids from preferences and networkController for custom rpcs
+
+*/
+
+const clone = require('clone')
+
+module.exports = {
+  version,
+
+  migrate: async function (originalVersionedData) {
+    const versionedData = clone(originalVersionedData)
+    versionedData.meta.version = version
+    const state = versionedData.data
+    const newState = transformState(state)
+    versionedData.data = newState
+    return versionedData
+  },
+}
+
+function transformState (state) {
+  const newState = state
+
+  const frequentRpcListDetail = newState.PreferencesController.frequentRpcListDetail
+  if (frequentRpcListDetail) {
+    frequentRpcListDetail.forEach((rpc, index) => {
+      if (!!rpc.chainId && Number.isNaN(parseInt(rpc.chainId))) {
+        delete frequentRpcListDetail[index].chainId
+      }
+    })
+    newState.PreferencesController.frequentRpcListDetail = frequentRpcListDetail
+  }
+
+  if (newState.NetworkController.network && Number.isNaN(parseInt(newState.NetworkController.network))) {
+    delete newState.NetworkController.network
+  }
+
+  if (newState.NetworkController.provider && newState.NetworkController.provider.chainId && Number.isNaN(parseInt(newState.NetworkController.provider.chainId))) {
+    delete newState.NetworkController.provider.chainId
+  }
+
+  return newState
+}
diff --git a/app/scripts/migrations/index.js b/app/scripts/migrations/index.js
index 9344b77ed..99cca94b8 100644
--- a/app/scripts/migrations/index.js
+++ b/app/scripts/migrations/index.js
@@ -40,4 +40,5 @@ module.exports = [
   require('./027'),
   require('./028'),
   require('./029'),
+  require('./030'),
 ]
diff --git a/test/unit/migrations/030-test.js b/test/unit/migrations/030-test.js
new file mode 100644
index 000000000..ca410342f
--- /dev/null
+++ b/test/unit/migrations/030-test.js
@@ -0,0 +1,37 @@
+const assert = require('assert')
+const migrationTemplate = require('../../../app/scripts/migrations/030.js')
+const storage = {
+  meta: {},
+  data: {
+    NetworkController: {
+      network: 'fail',
+      provider: {
+        chainId: 'fail',
+        nickname: '',
+        rpcTarget: 'https://api.myetherwallet.com/eth',
+        ticker: 'ETH',
+        type: 'rinkeby',
+      },
+    },
+    PreferencesController: {
+      frequentRpcListDetail: [
+        {chainId: 'fail', nickname: '', rpcUrl: 'http://127.0.0.1:8545', ticker: ''},
+        {chainId: '1', nickname: '', rpcUrl: 'https://api.myetherwallet.com/eth', ticker: 'ETH'},
+      ],
+    },
+  },
+}
+
+describe('storage is migrated successfully', () => {
+  it('should work', (done) => {
+    migrationTemplate.migrate(storage)
+    .then((migratedData) => {
+      assert.equal(migratedData.meta.version, 30)
+      assert.equal(migratedData.data.PreferencesController.frequentRpcListDetail[0].chainId, undefined)
+      assert.equal(migratedData.data.PreferencesController.frequentRpcListDetail[1].chainId, '1')
+      assert.equal(migratedData.data.NetworkController.provider.chainId, undefined)
+      assert.equal(migratedData.data.NetworkController.network, undefined)
+      done()
+    }).catch(done)
+  })
+})
diff --git a/ui/app/components/pages/settings/settings-tab/settings-tab.component.js b/ui/app/components/pages/settings/settings-tab/settings-tab.component.js
index eee472a00..16afa85cb 100644
--- a/ui/app/components/pages/settings/settings-tab/settings-tab.component.js
+++ b/ui/app/components/pages/settings/settings-tab/settings-tab.component.js
@@ -232,6 +232,9 @@ export default class SettingsTab extends PureComponent {
     const { setRpcTarget, displayWarning } = this.props
 
     if (validUrl.isWebUri(newRpc)) {
+      if (!!chainId && Number.isNaN(parseInt(chainId))) {
+        return displayWarning(`${this.context.t('invalidInput')} chainId`)
+      }
       setRpcTarget(newRpc, chainId, ticker, nickname)
     } else {
       const appendedRpc = `http://${newRpc}`