diff --git a/.changeset/great-drinks-help.md b/.changeset/great-drinks-help.md
new file mode 100644
index 000000000..deb34e4b0
--- /dev/null
+++ b/.changeset/great-drinks-help.md
@@ -0,0 +1,5 @@
+---
+"@usedapp/core": patch
+---
+
+Added 'Optimism Sepolia' testnet