diff --git a/README.md b/README.md
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@@ -34,7 +34,7 @@ More information about Thread can be found at [threadgroup.org](http://threadgro
 
 Led by Nest, the following companies are contributing to the ongoing development of OpenThread:
 
-<a href="https://developer.android.com/things/index.html"><img src="doc/images/ot-contrib-at.png" alt="Android Things" width="200px"></a><a href="https://www.arm.com/"><img src="doc/images/ot-contrib-arm.png" alt="ARM" width="200px"></a><a href="http://www.dialog-semiconductor.com/"><img src="doc/images/ot-contrib-dialog.png" alt="Dialog" width="200px"></a><a href="https://www.microsoft.com/en-us/"><img src="doc/images/ot-contrib-ms.png" alt="Microsoft" width="200px"></a><br /><a href="https://nest.com/"><img src="doc/images/ot-contrib-nest.png" alt="Nest" width="200px"></a><a href="http://www.nordicsemi.com/"><img src="doc/images/ot-contrib-nordic.png" alt="Nordic" width="200px"></a><a href="http://www.nxp.com/"><img src="doc/images/ot-contrib-nxp.png" alt="NXP" width="200px"></a><a href="http://www.qorvo.com/"><img src="doc/images/ot-contrib-qorvo.png" alt="Qorvo" width="200px"></a><br /><a href="https://www.qualcomm.com/"><img src="doc/images/ot-contrib-qc.png" alt="Qualcomm" width="200px"></a><a href="https://www.synopsys.com/"><img src="doc/images/ot-contrib-synopsys.png" alt="Synopsys" width="200px"></a><a href="https://www.ti.com/"><img src="doc/images/ot-contrib-ti.png" alt="Texas Instruments" width="200px"></a>
+<a href="https://developer.android.com/things/index.html"><img src="doc/images/ot-contrib-at.png" alt="Android Things" width="200px"></a><a href="https://www.arm.com/"><img src="doc/images/ot-contrib-arm.png" alt="ARM" width="200px"></a><a href="http://www.dialog-semiconductor.com/"><img src="doc/images/ot-contrib-dialog.png" alt="Dialog" width="200px"></a><a href="https://www.microsoft.com/en-us/"><img src="doc/images/ot-contrib-ms.png" alt="Microsoft" width="200px"></a><br /><a href="https://nest.com/"><img src="doc/images/ot-contrib-nest.png" alt="Nest" width="200px"></a><a href="http://www.nordicsemi.com/"><img src="doc/images/ot-contrib-nordic.png" alt="Nordic" width="200px"></a><a href="http://www.nxp.com/"><img src="doc/images/ot-contrib-nxp.png" alt="NXP" width="200px"></a><a href="http://www.qorvo.com/"><img src="doc/images/ot-contrib-qorvo.png" alt="Qorvo" width="200px"></a><br /><a href="https://www.qualcomm.com/"><img src="doc/images/ot-contrib-qc.png" alt="Qualcomm" width="200px"></a><a href="https://www.synopsys.com/"><img src="doc/images/ot-contrib-synopsys.png" alt="Synopsys" width="200px"></a><a href="https://www.ti.com/"><img src="doc/images/ot-contrib-ti.png" alt="Texas Instruments" width="200px"></a><a href="https://www.zephyrproject.org/"><img src="doc/images/ot-contrib-zephyr.png" alt="Zephyr Project" width="200px"></a>
 
 # Getting started
 
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