diff --git a/_data/simple-icons.json b/_data/simple-icons.json
index 631c6217..3b1fc404 100644
--- a/_data/simple-icons.json
+++ b/_data/simple-icons.json
@@ -14151,12 +14151,21 @@
         {
             "title": "Yammer",
             "hex": "106EBE",
-            "source": "https://developer.microsoft.com/en-us/fluentui#/styles/web/colors/products"
+            "source": "https://developer.microsoft.com/en-us/fluentui#/styles/web/colors/products",
+            "guidelines": "https://www.microsoft.com/en-us/legal/intellectualproperty/trademarks",
+            "license": {
+                "type": "custom",
+                "url": "https://aka.ms/fluentui-assets-license"
+            }
         },
         {
             "title": "Yarn",
             "hex": "2C8EBB",
-            "source": "https://github.com/yarnpkg/assets/tree/76d30ca2aebed5b73ea8131d972218fb860bd32d"
+            "source": "https://github.com/yarnpkg/assets/blob/76d30ca2aebed5b73ea8131d972218fb860bd32d/yarn-kitten-circle.svg",
+            "guidelines": "https://github.com/yarnpkg/assets/tree/76d30ca2aebed5b73ea8131d972218fb860bd32d",
+            "license": {
+                "type": "CC-BY-4.0"
+            }
         },
         {
             "title": "Yelp",