diff --git a/build/fuchsia/linux.sdk.sha1 b/build/fuchsia/linux.sdk.sha1
index ae989e289ba365..7899912842f879 100644
--- a/build/fuchsia/linux.sdk.sha1
+++ b/build/fuchsia/linux.sdk.sha1
@@ -1 +1 @@
-4.20210521.2.1
+4.20210521.3.1
diff --git a/build/fuchsia/mac.sdk.sha1 b/build/fuchsia/mac.sdk.sha1
index ae989e289ba365..7899912842f879 100644
--- a/build/fuchsia/mac.sdk.sha1
+++ b/build/fuchsia/mac.sdk.sha1
@@ -1 +1 @@
-4.20210521.2.1
+4.20210521.3.1