diff --git a/README.md b/README.md
index febd74ca..1209d2f6 100644
--- a/README.md
+++ b/README.md
@@ -336,7 +336,9 @@ Say thanks!
 <td>Kotlin<br><img src="https://edent.github.io/SuperTinyIcons/images/svg/kotlin.svg" width="125" title="Kotlin" /><br>291 Bytes</td>
 <td>Crystal<br><img src="https://edent.github.io/SuperTinyIcons/images/svg/crystal.svg" width="125" title="Crystal"/><br>593 Bytes</td>
 </tr>
-
+<tr>
+<td>Semaphore CI<br><img src="images/svg/semaphoreci.svg" width="125" title="Semaphore CI" /><br>641 Bytes</td>
+</tr>
 </table>
 
 ### Operating Systems / Kernel
diff --git a/images/reference/index.md b/images/reference/index.md
index 70a92eda..76e1be99 100644
--- a/images/reference/index.md
+++ b/images/reference/index.md
@@ -193,6 +193,7 @@ Where possible this links to the organisation's brand guidelines page.
 | <img src="/images/svg/gitea.svg" width="256"/> | <img src="/images/reference/gitea.png" width="256"/> | https://github.com/go-gitea/gitea/tree/master/assets |
 | <img src="/images/svg/drone.svg" width="256"/> | <img src="/images/reference/drone.png" width="256"/> | https://github.com/drone/brand |
 | <img src="/images/svg/rubygems.svg" width="256"/> | <img src="/images/reference/rubygems.png" width="256"/> | https://rubygems.org |
+| <img src="/images/svg/semaphoreci.svg" width="256" /> | <img src="/images/reference/semaphoreci.png" width="256" /> | https://twitter.com/semaphoreci |
 | <img src="/images/svg/ubiquiti.svg" width="256"/> | <img src="/images/reference/ubiquiti.png" width="256"/> | https://pbs.twimg.com/profile_images/862701781368713216/B7oW421__400x400.jpg |
 | <img src="/images/svg/verizon.svg" width="256"/> | <img src="/images/reference/verizon.png" width="256"/> | https://apps.apple.com/us/app/my-verizon/id416023011 |
 | <img src="/images/svg/wekan.svg" width="256"/> | <img src="/images/reference/wekan.svg" width="256"/> | https://github.com/wekan/wekan/blob/master/public/wekan-logo-150.svg |
@@ -203,4 +204,4 @@ Where possible this links to the organisation's brand guidelines page.
 | <img src="/images/svg/messenger.svg" width="256" />	| <img src="/images/reference/messenger.svg" width="256" />	| https://en.facebookbrand.com/assets/messenger/	|
 | <img src="/images/svg/ubisoft.svg" width="256"/> | <img src="/images/reference/ubisoft.png" width="256"/> | https://commons.wikimedia.org/wiki/File:Ubisoft_logo.svg |
 | <img src="/images/svg/ea.svg" width="256"/> | <img src="/images/reference/ea.png" width="256"/> | https://commons.wikimedia.org/wiki/File:EA-Logo.svg |
-| <img src="/images/svg/amazon_alexa.svg" width="256"/> | <img src="/images/reference/amazon_alexa.png" width="256"/> | https://developer.amazon.com/docs/alexa-voice-service/logo-and-brand.html |
+| <img src="/images/svg/amazon_alexa.svg" width="256"/> | <img src="/images/reference/amazon_alexa.png" width="256"/> | https://developer.amazon.com/docs/alexa-voice-service/logo-and-brand.html |
\ No newline at end of file
diff --git a/images/reference/semaphoreci.png b/images/reference/semaphoreci.png
new file mode 100644
index 00000000..f2c7d401
Binary files /dev/null and b/images/reference/semaphoreci.png differ
diff --git a/images/svg/semaphoreci.svg b/images/svg/semaphoreci.svg
new file mode 100644
index 00000000..b9efa7bc
--- /dev/null
+++ b/images/svg/semaphoreci.svg
@@ -0,0 +1,6 @@
+<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"
+aria-label="Semaphore CI" role="img"
+viewBox="0 0 512 512"><rect
+width="512" height="512"
+rx="15%"
+fill="#fff"/><g fill="#f75819"><path id="s" d="M278.6 205.8a56.7 56.7 0 0 0-69.8 78.5l-65.4 65.4-10.2 1.5-37.8 7.3A84.3 84.3 0 0 1 72 303.2l32-21.8v1.5c-3-16-3-32 0-48l-32-20.4a84.3 84.3 0 0 1 23.3-56.7l37.8 7.3-1.5 1.4c10.2-13 21.8-24.7 33.5-33.4l-7.3-37.8A85.8 85.8 0 0 1 213.2 72l21.8 32h-1.5c16-3 32-3 48 0H280L302 72A85.8 85.8 0 0 1 357 95.3l-5.8 36.3-1.5 13.1-65.4 64-5.8-3"/></g><use xlink:href="#s" fill="#9C3" transform="rotate(180 256 256)"/></svg>