diff --git a/scripts/tasks/publish.ts b/scripts/tasks/publish.ts
index 1bece8774..effe83333 100644
--- a/scripts/tasks/publish.ts
+++ b/scripts/tasks/publish.ts
@@ -4,10 +4,10 @@ import * as fs from 'fs-extra';
 import { merge } from 'lodash';
 import { cpus } from 'os';
 import * as path from 'path';
+
 import { PLUGIN_PATHS, ROOT } from '../build/helpers';
 import { Logger } from '../logger';
 
-
 // tslint:disable-next-line:no-var-requires
 const MAIN_PACKAGE_JSON = require('../../package.json');
 const VERSION = MAIN_PACKAGE_JSON.version;
@@ -29,14 +29,15 @@ const DIST = path.resolve(ROOT, 'dist/@ionic-native');
 
 const PACKAGES = [];
 
-const RXJS_VERSION = '*';
+const MIN_CORE_VERSION = '^5.1.0';
+const RXJS_VERSION = '^6.3.0';
 
 const PLUGIN_PEER_DEPENDENCIES = {
-  '@ionic-native/core': VERSION, // TODO change this in production
+  '@ionic-native/core': MIN_CORE_VERSION,
   rxjs: RXJS_VERSION
 };
 
-function getPackageJsonContent(name, peerDependencies = {}, dependencies = {}) {
+function getPackageJsonContent(name: string, peerDependencies = {}, dependencies = {}) {
   return merge(PACKAGE_JSON_BASE, {
     name: '@ionic-native/' + name,
     dependencies,
@@ -61,10 +62,7 @@ function prepare() {
   // write plugin package.json files
   PLUGIN_PATHS.forEach((pluginPath: string) => {
     const pluginName = pluginPath.split(/[\/\\]+/).slice(-2)[0];
-    const packageJsonContents = getPackageJsonContent(
-      pluginName,
-      PLUGIN_PEER_DEPENDENCIES
-    );
+    const packageJsonContents = getPackageJsonContent(pluginName, PLUGIN_PEER_DEPENDENCIES);
     const dir = path.resolve(DIST, 'plugins', pluginName);
 
     writePackageJson(packageJsonContents, dir);
@@ -74,28 +72,27 @@ function prepare() {
 async function publish(ignoreErrors = false) {
   Logger.profile('Publishing');
   // upload 1 package per CPU thread at a time
-  const worker = Queue.async.asyncify((pkg: any) =>
-    new Promise<any>((resolve, reject) => {
-      exec(`npm publish ${pkg} ${FLAGS}`, (err, stdout) => {
-        if (stdout) {
-          Logger.verbose(stdout.trim());
-          resolve(stdout);
-        }
-        if (err) {
-          if (!ignoreErrors) {
-            if (
-              err.message.includes(
-                'You cannot publish over the previously published version'
-              )
-            ) {
-              Logger.verbose('Ignoring duplicate version error.');
-              return resolve();
-            }
-            reject(err);
+  const worker = Queue.async.asyncify(
+    (pkg: any) =>
+      new Promise<any>((resolve, reject) => {
+        exec(`npm publish ${pkg} ${FLAGS}`, (err, stdout) => {
+          if (stdout) {
+            Logger.verbose(stdout.trim());
+            resolve(stdout);
           }
-        }
-      });
-    })
+          if (err) {
+            if (!ignoreErrors) {
+              if (
+                err.message.includes('You cannot publish over the previously published version')
+              ) {
+                Logger.verbose('Ignoring duplicate version error.');
+                return resolve();
+              }
+              reject(err);
+            }
+          }
+        });
+      })
   );
 
   try {