diff --git a/cypress/integration/rendering/gantt.spec.js b/cypress/integration/rendering/gantt.spec.js
index 73ff4ee00..4abde9d44 100644
--- a/cypress/integration/rendering/gantt.spec.js
+++ b/cypress/integration/rendering/gantt.spec.js
@@ -583,4 +583,106 @@ describe('Gantt diagram', () => {
       {}
     );
   });
+
+  it("should render when there's a semicolon in the title", () => {
+    imgSnapshotTest(
+      `
+      gantt
+      title ;Gantt With a Semicolon in the Title
+      dateFormat  YYYY-MM-DD
+      section Section
+      A task           :a1, 2014-01-01, 30d
+      Another task     :after a1  , 20d
+      section Another
+      Task in sec      :2014-01-12  , 12d
+      another task      : 24d
+    `,
+      {}
+    );
+  });
+
+  it("should render when there's a semicolon in a section is true", () => {
+    imgSnapshotTest(
+      `
+      gantt
+      title Gantt Digram
+      dateFormat  YYYY-MM-DD
+      section ;Section With a Semicolon
+      A task           :a1, 2014-01-01, 30d
+      Another task     :after a1  , 20d
+      section Another
+      Task in sec      :2014-01-12  , 12d
+      another task      : 24d
+    `,
+      {}
+    );
+  });
+
+  it("should render when there's a semicolon in the task data", () => {
+    imgSnapshotTest(
+      `
+      gantt
+      title Gantt Digram
+      dateFormat  YYYY-MM-DD
+      section Section
+      ;A task with a semiclon           :a1, 2014-01-01, 30d
+      Another task     :after a1  , 20d
+      section Another
+      Task in sec      :2014-01-12  , 12d
+      another task      : 24d
+    `,
+      {}
+    );
+  });
+
+  it("should render when there's a hashtag in the title", () => {
+    imgSnapshotTest(
+      `
+      gantt
+      title #Gantt With a Hashtag in the Title
+      dateFormat  YYYY-MM-DD
+      section Section
+      A task           :a1, 2014-01-01, 30d
+      Another task     :after a1  , 20d
+      section Another
+      Task in sec      :2014-01-12  , 12d
+      another task      : 24d
+    `,
+      {}
+    );
+  });
+
+  it("should render when there's a hashtag in a section is true", () => {
+    imgSnapshotTest(
+      `
+      gantt
+      title Gantt Digram
+      dateFormat  YYYY-MM-DD
+      section #Section With a Hashtag
+      A task           :a1, 2014-01-01, 30d
+      Another task     :after a1  , 20d
+      section Another
+      Task in sec      :2014-01-12  , 12d
+      another task      : 24d
+    `,
+      {}
+    );
+  });
+
+  it("should render when there's a hashtag in the task data", () => {
+    imgSnapshotTest(
+      `
+      gantt
+      title Gantt Digram
+      dateFormat  YYYY-MM-DD
+      section Section
+      #A task with a hashtag           :a1, 2014-01-01, 30d
+      Another task     :after a1  , 20d
+      section Another
+      Task in sec      :2014-01-12  , 12d
+      another task      : 24d
+    `,
+      {}
+    );
+  });
 });
diff --git a/demos/gantt.html b/demos/gantt.html
index 88f52ef5c..9c82371ab 100644
--- a/demos/gantt.html
+++ b/demos/gantt.html
@@ -30,6 +30,21 @@
     </pre>
     <hr />
 
+    <pre class="mermaid">
+      gantt
+        title #; Gantt Diagrams Allow Semicolons and Hashtags #;!
+        accTitle: A simple sample gantt diagram
+        accDescr: 2 sections with 2 tasks each, from 2014
+        dateFormat  YYYY-MM-DD
+        section #;Section
+        #;A task           :a1, 2014-01-01, 30d
+        #;Another task     :after a1  , 20d
+        section #;Another
+        Task in sec      :2014-01-12  , 12d
+        another task      : 24d
+    </pre>
+    <hr />
+
     <pre class="mermaid">
     gantt
       title Airworks roadmap
diff --git a/packages/mermaid/src/diagrams/gantt/parser/gantt.spec.js b/packages/mermaid/src/diagrams/gantt/parser/gantt.spec.js
index e7ce1ffa4..ae5f74249 100644
--- a/packages/mermaid/src/diagrams/gantt/parser/gantt.spec.js
+++ b/packages/mermaid/src/diagrams/gantt/parser/gantt.spec.js
@@ -28,8 +28,12 @@ describe('when parsing a gantt diagram it', function () {
   });
   it('should handle a title definition', function () {
     const str = 'gantt\ndateFormat yyyy-mm-dd\ntitle Adding gantt diagram functionality to mermaid';
+    const semi = 'gantt\ndateFormat yyyy-mm-dd\ntitle ;Gantt diagram titles support semicolons';
+    const hash = 'gantt\ndateFormat yyyy-mm-dd\ntitle #Gantt diagram titles support hashtags';
 
     expect(parserFnConstructor(str)).not.toThrow();
+    expect(parserFnConstructor(semi)).not.toThrow();
+    expect(parserFnConstructor(hash)).not.toThrow();
   });
   it('should handle an excludes definition', function () {
     const str =
@@ -53,7 +57,23 @@ describe('when parsing a gantt diagram it', function () {
       'excludes weekdays 2019-02-01\n' +
       'section Documentation';
 
+    const semi =
+      'gantt\n' +
+      'dateFormat yyyy-mm-dd\n' +
+      'title Adding gantt diagram functionality to mermaid\n' +
+      'excludes weekdays 2019-02-01\n' +
+      'section ;Documentation';
+
+    const hash =
+      'gantt\n' +
+      'dateFormat yyyy-mm-dd\n' +
+      'title Adding gantt diagram functionality to mermaid\n' +
+      'excludes weekdays 2019-02-01\n' +
+      'section #Documentation';
+
     expect(parserFnConstructor(str)).not.toThrow();
+    expect(parserFnConstructor(semi)).not.toThrow();
+    expect(parserFnConstructor(hash)).not.toThrow();
   });
   it('should handle multiline section titles with different line breaks', function () {
     const str =
@@ -73,7 +93,23 @@ describe('when parsing a gantt diagram it', function () {
       'section Documentation\n' +
       'Design jison grammar:des1, 2014-01-01, 2014-01-04';
 
+    const semi =
+      'gantt\n' +
+      'dateFormat YYYY-MM-DD\n' +
+      'title Adding gantt diagram functionality to mermaid\n' +
+      'section Documentation\n' +
+      ';Design jison grammar:des1, 2014-01-01, 2014-01-04';
+
+    const hash =
+      'gantt\n' +
+      'dateFormat YYYY-MM-DD\n' +
+      'title Adding gantt diagram functionality to mermaid\n' +
+      'section Documentation\n' +
+      '#Design jison grammar:des1, 2014-01-01, 2014-01-04';
+
     expect(parserFnConstructor(str)).not.toThrow();
+    expect(parserFnConstructor(semi)).not.toThrow();
+    expect(parserFnConstructor(hash)).not.toThrow();
 
     const tasks = parser.yy.getTasks();