diff --git a/README.md b/README.md
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+++ b/README.md
@@ -96,6 +96,8 @@ The following properties can be configured:
 |`holiday`|Will display the effect on the holiday found at [https://www.timeanddate.com/holidays/us/?hol=43122559](https://www.timeanddate.com/holidays/us/?hol=43122559). Simply copy the "Name" value from that table. <br><br>**Type:** `string`<br>**Default value:** `null`|
 |`images`|An array of image files to display at random for this effect. All files need to be in the "images" folder of the MMM-DynamicWeather module folder.<br><br>**Type:** `string[]`<br>**Default value:** `null`|
 |`recurrence`|Display the effect repeatedly.<br>Yearly - Not a recurrence option, just leave year unset or zero.<br><br>**Options:**`monthly`,`weekly`,`weekdays`,`weekends`<br>**Type:** `string`<br>**Default value:** `null`|
+|`maxSpeed`|The max speed factor. Closer to zero is faster. <br><br>**Type:** `number`<br>**Default value:** `100`|
+|`minSpeed`|The min speed factor. Closer to zero is faster. <br><br>**Type:** `number`<br>**Default value:** `50`|
 |`size`|The size factor to display the image; larger the number the larger the picture.<br><br>**Type:** `number`<br>**Default value:** `1`|
 |`weatherCode`|The effect will be displayed whenever the current weather matches this code. You can find all valid codes [here](https://openweathermap.org/weather-conditions)<br>This does not change the default weather effects, those will still be shown unless `hideSnow`, `hideRain` or `hideClouds` is turned on. <br><br>**Type:** `number`<br>**Default value:** `0`|
 |`weatherCodeMin`|Similar to `weatherCode` but will show the effect if the current weather code is greater or equal to this value. <br><br>**Type:** `number`<br>**Default value:** `0`|