diff --git a/cypress/integration/rendering/gantt.spec.js b/cypress/integration/rendering/gantt.spec.js
index 33d3ac9e1..7c1690952 100644
--- a/cypress/integration/rendering/gantt.spec.js
+++ b/cypress/integration/rendering/gantt.spec.js
@@ -330,6 +330,48 @@ describe('Gantt diagram', () => {
     );
   });
 
+  it('should render a gantt diagram with tick is 2 milliseconds', () => {
+    imgSnapshotTest(
+      `
+      gantt
+        title A Gantt Diagram
+        dateFormat   SSS
+        axisFormat   %Lms
+        tickInterval 2millisecond
+        excludes     weekends
+
+        section Section
+        A task           : a1, 000, 6ms
+        Another task     : after a1, 6ms
+        section Another
+        Task in sec      : a2, 006, 3ms
+        another task     : 3ms
+      `,
+      {}
+    );
+  });
+
+  it('should render a gantt diagram with tick is 2 seconds', () => {
+    imgSnapshotTest(
+      `
+      gantt
+        title A Gantt Diagram
+        dateFormat   ss
+        axisFormat   %Ss
+        tickInterval 2second
+        excludes     weekends
+
+        section Section
+        A task           : a1, 00, 6s
+        Another task     : after a1, 6s
+        section Another
+        Task in sec      : 06, 3s
+        another task     : 3s
+      `,
+      {}
+    );
+  });
+
   it('should render a gantt diagram with tick is 15 minutes', () => {
     imgSnapshotTest(
       `
diff --git a/docs/syntax/gantt.md b/docs/syntax/gantt.md
index 8ad438fb1..33c2740e5 100644
--- a/docs/syntax/gantt.md
+++ b/docs/syntax/gantt.md
@@ -241,7 +241,7 @@ The following formatting strings are supported:
 
 More info in: <https://github.com/d3/d3-time-format/tree/v4.0.0#locale_format>
 
-### Axis ticks
+### Axis ticks (v10.3.0+)
 
 The default output ticks are auto. You can custom your `tickInterval`, like `1day` or `1week`.
 
@@ -252,7 +252,7 @@ tickInterval 1day
 The pattern is:
 
 ```javascript
-/^([1-9][0-9]*)(minute|hour|day|week|month)$/;
+/^([1-9][0-9]*)(millisecond|second|minute|hour|day|week|month)$/;
 ```
 
 More info in: <https://github.com/d3/d3-time#interval_every>
@@ -271,7 +271,7 @@ gantt
   weekday monday
 ```
 
-Support: v10.3.0+
+> **Warning** > `millisecond` and `second` support was added in vMERMAID_RELEASE_VERSION
 
 ## Output in compact mode
 
diff --git a/packages/mermaid/src/docs/syntax/gantt.md b/packages/mermaid/src/docs/syntax/gantt.md
index 2d7af6a26..a0cebc560 100644
--- a/packages/mermaid/src/docs/syntax/gantt.md
+++ b/packages/mermaid/src/docs/syntax/gantt.md
@@ -173,7 +173,7 @@ The following formatting strings are supported:
 
 More info in: [https://github.com/d3/d3-time-format/tree/v4.0.0#locale_format](https://github.com/d3/d3-time-format/tree/v4.0.0#locale_format)
 
-### Axis ticks
+### Axis ticks (v10.3.0+)
 
 The default output ticks are auto. You can custom your `tickInterval`, like `1day` or `1week`.
 
@@ -197,7 +197,9 @@ gantt
   weekday monday
 ```
 
-Support: v10.3.0+
+```warning
+`millisecond` and `second` support was added in vMERMAID_RELEASE_VERSION
+```
 
 ## Output in compact mode