diff --git a/README.md b/README.md
index b4566d1d7..849c65c01 100644
--- a/README.md
+++ b/README.md
@@ -32,7 +32,7 @@ More information about Thread can be found at [threadgroup.org](http://threadgro
 
 # Who supports OpenThread?
 
-<a href="https://www.arm.com/"><img src="doc/images/ot-contrib-arm.png" alt="ARM" width="200px"></a><a href="https://www.cascoda.com/"><img src="doc/images/ot-contrib-cascoda.png" alt="Cascoda" width="200px"></a><a href="https://www.google.com/"><img src="doc/images/ot-contrib-google.png" alt="Google" 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="https://www.particle.io/"><img src="doc/images/ot-contrib-particle.png" alt="Particle" width="200px"></a><a href="http://www.qorvo.com/"><img src="doc/images/ot-contrib-qorvo.png" alt="Qorvo" width="200px"></a><a href="https://www.qualcomm.com/"><img src="doc/images/ot-contrib-qc.png" alt="Qualcomm" width="200px"></a><a href="https://www.samsung.com/"><img src="doc/images/ot-contrib-samsung.png" alt="Samsung" width="200px"></a><a href="https://www.silabs.com/"><img src="doc/images/ot-contrib-silabs.png" alt="Silicon Labs" width="200px"></a><a href="https://www.st.com/"><img src="doc/images/ot-contrib-stm.png" alt="STMicroelectronics" 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>
+<a href="https://www.arm.com/"><img src="doc/images/ot-contrib-arm.png" alt="ARM" width="200px"></a><a href="https://www.cascoda.com/"><img src="doc/images/ot-contrib-cascoda.png" alt="Cascoda" width="200px"></a><a href="https://www.google.com/"><img src="doc/images/ot-contrib-google.png" alt="Google" 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><a href="https://www.qualcomm.com/"><img src="doc/images/ot-contrib-qc.png" alt="Qualcomm" width="200px"></a><a href="https://www.samsung.com/"><img src="doc/images/ot-contrib-samsung.png" alt="Samsung" width="200px"></a><a href="https://www.silabs.com/"><img src="doc/images/ot-contrib-silabs.png" alt="Silicon Labs" width="200px"></a><a href="https://www.st.com/"><img src="doc/images/ot-contrib-stm.png" alt="STMicroelectronics" 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
 
diff --git a/doc/Makefile.am b/doc/Makefile.am
index 66e8aa3aa..b08da75f8 100644
--- a/doc/Makefile.am
+++ b/doc/Makefile.am
@@ -38,7 +38,6 @@ EXTRA_DIST                                      = \
     $(srcdir)/images/ot-contrib-google.png        \
     $(srcdir)/images/ot-contrib-nordic.png        \
     $(srcdir)/images/ot-contrib-nxp.png           \
-    $(srcdir)/images/ot-contrib-particle.png      \
     $(srcdir)/images/ot-contrib-qc.png            \
     $(srcdir)/images/ot-contrib-qorvo.png         \
     $(srcdir)/images/ot-contrib-samsung.png       \
diff --git a/doc/images/ot-contrib-particle.png b/doc/images/ot-contrib-particle.png
deleted file mode 100644
index bf5ffc537..000000000
Binary files a/doc/images/ot-contrib-particle.png and /dev/null differ