diff --git a/src/diagrams/sequenceDiagram/sequenceDiagram.spec.js b/src/diagrams/sequenceDiagram/sequenceDiagram.spec.js
index 04ba2bbee..4aba15459 100644
--- a/src/diagrams/sequenceDiagram/sequenceDiagram.spec.js
+++ b/src/diagrams/sequenceDiagram/sequenceDiagram.spec.js
@@ -730,8 +730,6 @@ describe('when rendering a sequenceDiagram', function () {
     parser.yy = sequenceDb
     parser.yy.clear()
 
-    delete global.mermaid_config
-
     NewD3 = function () {
       const o = {
         append: function () {
diff --git a/src/mermaid.js b/src/mermaid.js
index d141265e1..59cb2580b 100644
--- a/src/mermaid.js
+++ b/src/mermaid.js
@@ -66,9 +66,6 @@ const init = function () {
       : nodes instanceof window.Node ? [nodes]
         : nodes // Last case  - sequence config was passed pick next
 
-  if (typeof global.mermaid_config !== 'undefined') {
-    mermaidAPI.initialize(global.mermaid_config)
-  }
   logger.debug('Start On Load before: ' + mermaid.startOnLoad)
   if (typeof mermaid.startOnLoad !== 'undefined') {
     logger.debug('Start On Load inner: ' + mermaid.startOnLoad)
@@ -133,26 +130,12 @@ const initialize = function (config) {
  */
 const contentLoaded = function () {
   let config
-  // Check state of start config mermaid namespace
-  if (typeof global.mermaid_config !== 'undefined') {
-    if (global.mermaid_config.htmlLabels === false) {
-      mermaid.htmlLabels = false
-    }
-  }
 
   if (mermaid.startOnLoad) {
-    // For backwards compatability reasons also check mermaid_config variable
-    if (typeof global.mermaid_config !== 'undefined') {
-      // Check if property startOnLoad is set
-      if (global.mermaid_config.startOnLoad === true) {
-        mermaid.init()
-      }
-    } else {
-      // No config found, do check API config
-      config = mermaidAPI.getConfig()
-      if (config.startOnLoad) {
-        mermaid.init()
-      }
+    // No config found, do check API config
+    config = mermaidAPI.getConfig()
+    if (config.startOnLoad) {
+      mermaid.init()
     }
   } else {
     if (typeof mermaid.startOnLoad === 'undefined') {
diff --git a/src/mermaid.spec.js b/src/mermaid.spec.js
index 433ba8863..37e3c5516 100644
--- a/src/mermaid.spec.js
+++ b/src/mermaid.spec.js
@@ -6,19 +6,8 @@ import flowRenderer from './diagrams/flowchart/flowRenderer'
 
 describe('when using mermaid and ', function () {
   describe('when detecting chart type ', function () {
-    it('should not start rendering with mermaid_config.startOnLoad set to false', function () {
-      global.mermaid_config = { startOnLoad: false }
-
-      document.body.innerHTML = '<div class="mermaid">graph TD;\na;</div>'
-      spyOn(mermaid, 'init')
-      mermaid.contentLoaded()
-      expect(mermaid.init).not.toHaveBeenCalled()
-    })
-
     it('should not start rendering with mermaid.startOnLoad set to false', function () {
       mermaid.startOnLoad = false
-      global.mermaid_config = { startOnLoad: true }
-
       document.body.innerHTML = '<div class="mermaid">graph TD;\na;</div>'
       spyOn(mermaid, 'init')
       mermaid.contentLoaded()
@@ -27,14 +16,13 @@ describe('when using mermaid and ', function () {
 
     it('should start rendering with both startOnLoad set', function () {
       mermaid.startOnLoad = true
-      global.mermaid_config = { startOnLoad: true }
       document.body.innerHTML = '<div class="mermaid">graph TD;\na;</div>'
       spyOn(mermaid, 'init')
       mermaid.contentLoaded()
       expect(mermaid.init).toHaveBeenCalled()
     })
 
-    it('should start rendering with mermaid.startOnLoad set and no mermaid_config defined', function () {
+    it('should start rendering with mermaid.startOnLoad', function () {
       mermaid.startOnLoad = true
       document.body.innerHTML = '<div class="mermaid">graph TD;\na;</div>'
       spyOn(mermaid, 'init')
@@ -52,7 +40,6 @@ describe('when using mermaid and ', function () {
 
   describe('when calling addEdges ', function () {
     beforeEach(function () {
-      global.mermaid_config = { startOnLoad: false }
       flowParser.parser.yy = graphDb
       graphDb.clear()
     })
diff --git a/src/mermaidAPI.spec.js b/src/mermaidAPI.spec.js
index 5ed3cbd5e..51749677c 100644
--- a/src/mermaidAPI.spec.js
+++ b/src/mermaidAPI.spec.js
@@ -4,7 +4,6 @@ import mermaidAPI from './mermaidAPI'
 describe('when using mermaidAPI and ', function () {
   describe('doing initialize ', function () {
     beforeEach(function () {
-      delete global.mermaid_config
       document.body.innerHTML = ''
     })
 
diff --git a/todo.md b/todo.md
index e6c4e232e..65f24b34c 100644
--- a/todo.md
+++ b/todo.md
@@ -1,6 +1,5 @@
 - Get familar with jison
 - git graph requires a blank line at the end. why?
-- global.mermaid_config
 - rewrite logger
 - rewrite less code
 - Setup code coverage