diff --git a/.gitignore b/.gitignore
index 36ccaaa9..2e9dcf9c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,3 +5,4 @@ node_modules
 npm-debug.log*
 .eslintcache
 package-lock.json
+*.iml
diff --git a/README.md b/README.md
index 28943fab..3ba6b44e 100644
--- a/README.md
+++ b/README.md
@@ -82,17 +82,17 @@ To use swagger-ui's bundles, you should take a look at the [source of swagger-ui
 
 ```javascript
   const ui = SwaggerUIBundle({
-    url: "http://petstore.swagger.io/v2/swagger.json",
-    dom_id: '#swagger-ui',
-    presets: [
-      SwaggerUIBundle.presets.apis,
-      SwaggerUIStandalonePreset
-    ],
-    plugins: [
-      SwaggerUIBundle.plugins.DownloadUrl
-    ],
-    layout: "StandaloneLayout"
-  })
+      url: "http://petstore.swagger.io/v2/swagger.json",
+      dom_id: '#swagger-ui',
+      presets: [
+        SwaggerUIBundle.presets.apis,
+        SwaggerUIStandalonePreset
+      ],
+      plugins: [
+        SwaggerUIBundle.plugins.DownloadUrl
+      ],
+      layout: "StandaloneLayout"
+    })
 ```
 
 #### OAuth2 configuration
@@ -137,6 +137,7 @@ spec | A JSON object describing the OpenAPI Specification. When used, the `url`
 validatorUrl | By default, Swagger-UI attempts to validate specs against swagger.io's online validator. You can use this parameter to set a different validator URL, for example for locally deployed validators ([Validator Badge](https://github.com/swagger-api/validator-badge)). Setting it to `null` will disable validation.
 dom_id | The id of a dom element inside which SwaggerUi will put the user interface for swagger.
 oauth2RedirectUrl | OAuth redirect URL
+tagsSorter | Apply a sort to the tag list of each API. It can be 'alpha' (sort by paths alphanumerically) or a function (see [Array.prototype.sort()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/sort) to learn how to write a sort function). Two tag name strings are passed to the sorter for each pass. Default is the order determined by Swagger-UI.
 operationsSorter | Apply a sort to the operation list of each API. It can be 'alpha' (sort by paths alphanumerically), 'method' (sort by HTTP method) or a function (see Array.prototype.sort() to know how sort function works). Default is the order returned by the server unchanged.
 configUrl | Configs URL
 parameterMacro | MUST be a function. Function to set default value to parameters. Accepts two arguments parameterMacro(operation, parameter). Operation and parameter are objects passed for context, both remain immutable
diff --git a/dev-helpers/index.html b/dev-helpers/index.html
index 9058c220..a528687b 100644
--- a/dev-helpers/index.html
+++ b/dev-helpers/index.html
@@ -11,15 +11,15 @@
   <style>
     html
     {
-        box-sizing: border-box;
-        overflow: -moz-scrollbars-vertical;
-        overflow-y: scroll;
+      box-sizing: border-box;
+      overflow: -moz-scrollbars-vertical;
+      overflow-y: scroll;
     }
     *,
     *:before,
     *:after
     {
-        box-sizing: inherit;
+      box-sizing: inherit;
     }
 
     body {
@@ -34,7 +34,7 @@
 <svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" style="position:absolute;width:0;height:0">
   <defs>
     <symbol viewBox="0 0 20 20" id="unlocked">
-          <path d="M15.8 8H14V5.6C14 2.703 12.665 1 10 1 7.334 1 6 2.703 6 5.6V6h2v-.801C8 3.754 8.797 3 10 3c1.203 0 2 .754 2 2.199V8H4c-.553 0-1 .646-1 1.199V17c0 .549.428 1.139.951 1.307l1.197.387C5.672 18.861 6.55 19 7.1 19h5.8c.549 0 1.428-.139 1.951-.307l1.196-.387c.524-.167.953-.757.953-1.306V9.199C17 8.646 16.352 8 15.8 8z"></path>
+      <path d="M15.8 8H14V5.6C14 2.703 12.665 1 10 1 7.334 1 6 2.703 6 5.6V6h2v-.801C8 3.754 8.797 3 10 3c1.203 0 2 .754 2 2.199V8H4c-.553 0-1 .646-1 1.199V17c0 .549.428 1.139.951 1.307l1.197.387C5.672 18.861 6.55 19 7.1 19h5.8c.549 0 1.428-.139 1.951-.307l1.196-.387c.524-.167.953-.757.953-1.306V9.199C17 8.646 16.352 8 15.8 8z"></path>
     </symbol>
 
     <symbol viewBox="0 0 20 20" id="locked">
@@ -70,34 +70,34 @@
 <script src="./swagger-ui-bundle.js"> </script>
 <script src="./swagger-ui-standalone-preset.js"> </script>
 <script>
-window.onload = function() {
-  window["SwaggerUIBundle"] = window["swagger-ui-bundle"]
-  window["SwaggerUIStandalonePreset"] = window["swagger-ui-standalone-preset"]
-  // Build a system
-  const ui = SwaggerUIBundle({
-    url: "http://petstore.swagger.io/v2/swagger.json",
-    dom_id: '#swagger-ui',
-    presets: [
-      SwaggerUIBundle.presets.apis,
-      SwaggerUIStandalonePreset
-    ],
-    plugins: [
-      SwaggerUIBundle.plugins.DownloadUrl
-    ],
-    layout: "StandaloneLayout"
-  })
+  window.onload = function() {
+    window["SwaggerUIBundle"] = window["swagger-ui-bundle"]
+    window["SwaggerUIStandalonePreset"] = window["swagger-ui-standalone-preset"]
+    // Build a system
+    const ui = SwaggerUIBundle({
+      url: "http://petstore.swagger.io/v2/swagger.json",
+      dom_id: '#swagger-ui',
+      presets: [
+        SwaggerUIBundle.presets.apis,
+        SwaggerUIStandalonePreset
+      ],
+      plugins: [
+        SwaggerUIBundle.plugins.DownloadUrl
+      ],
+      layout: "StandaloneLayout"
+    })
 
-  window.ui = ui
+    window.ui = ui
 
-  ui.initOAuth({
-    clientId: "your-client-id",
-    clientSecret: "your-client-secret-if-required",
-    realm: "your-realms",
-    appName: "your-app-name",
-    scopeSeparator: " ",
-    additionalQueryStringParams: {}
-  })
-}
+    ui.initOAuth({
+      clientId: "your-client-id",
+      clientSecret: "your-client-secret-if-required",
+      realm: "your-realms",
+      appName: "your-app-name",
+      scopeSeparator: " ",
+      additionalQueryStringParams: {}
+    })
+  }
 </script>
 </body>
 
diff --git a/src/core/index.js b/src/core/index.js
index f9e76aac..fa5db888 100644
--- a/src/core/index.js
+++ b/src/core/index.js
@@ -6,9 +6,31 @@ import ApisPreset from "core/presets/apis"
 import * as AllPlugins from "core/plugins/all"
 import { parseSeach, filterConfigs } from "core/utils"
 
-const CONFIGS = [ "url", "urls", "urls.primaryName", "spec", "validatorUrl", "onComplete", "onFailure", "authorizations", "docExpansion", "maxDisplayedTags", "filter",
-    "apisSorter", "operationsSorter", "supportedSubmitMethods", "dom_id", "defaultModelRendering", "oauth2RedirectUrl",
-    "showRequestHeaders", "custom", "modelPropertyMacro", "parameterMacro", "displayOperationId" , "displayRequestDuration"]
+const CONFIGS = [
+  "url",
+  "urls",
+  "urls.primaryName",
+  "spec",
+  "validatorUrl",
+  "onComplete",
+  "onFailure",
+  "authorizations",
+  "docExpansion",
+  "tagsSorter",
+  "maxDisplayedTags",
+  "filter",
+  "operationsSorter",
+  "supportedSubmitMethods",
+  "dom_id",
+  "defaultModelRendering",
+  "oauth2RedirectUrl",
+  "showRequestHeaders",
+  "custom",
+  "modelPropertyMacro",
+  "parameterMacro",
+  "displayOperationId",
+  "displayRequestDuration",
+ ]
 
 // eslint-disable-next-line no-undef
 const { GIT_DIRTY, GIT_COMMIT, PACKAGE_VERSION, HOSTNAME, BUILD_TIME } = buildInfo
diff --git a/src/core/plugins/spec/selectors.js b/src/core/plugins/spec/selectors.js
index cd7e722b..ed52675f 100644
--- a/src/core/plugins/spec/selectors.js
+++ b/src/core/plugins/spec/selectors.js
@@ -200,15 +200,22 @@ export const operationsWithTags = createSelector(
   }
 )
 
-export const taggedOperations = ( state ) =>( { getConfigs } ) => {
-  let { operationsSorter }= getConfigs()
+export const taggedOperations = (state) => ({ getConfigs }) => {
+  let { tagsSorter, operationsSorter } = getConfigs()
+  return operationsWithTags(state)
+    .sortBy(
+      (val, key) => key, // get the name of the tag to be passed to the sorter
+      (tagA, tagB) => {
+        let sortFn = (typeof tagsSorter === "function" ? tagsSorter : sorters.tagsSorter[ tagsSorter ])
+        return (!sortFn ? null : sortFn(tagA, tagB))
+      }
+    )
+    .map((ops, tag) => {
+      let sortFn = (typeof operationsSorter === "function" ? operationsSorter : sorters.operationsSorter[ operationsSorter ])
+      let operations = (!sortFn ? ops : ops.sort(sortFn))
 
-  return operationsWithTags(state).map((ops, tag) => {
-    let sortFn = typeof operationsSorter === "function" ? operationsSorter
-                                                        : sorters.operationsSorter[operationsSorter]
-    let operations = !sortFn ? ops : ops.sort(sortFn)
-
-    return Map({tagDetails: tagDetails(state, tag), operations: operations})})
+      return Map({ tagDetails: tagDetails(state, tag), operations: operations })
+    })
 }
 
 export const responses = createSelector(
diff --git a/src/core/utils.js b/src/core/utils.js
index 448a8e9c..677b8d90 100644
--- a/src/core/utils.js
+++ b/src/core/utils.js
@@ -574,6 +574,9 @@ export const sorters = {
   operationsSorter: {
     alpha: (a, b) => a.get("path").localeCompare(b.get("path")),
     method: (a, b) => a.get("method").localeCompare(b.get("method"))
+  },
+  tagsSorter: {
+    alpha: (a, b) => a.localeCompare(b)
   }
 }