diff --git a/.changeset/tricky-pears-check.md b/.changeset/tricky-pears-check.md
new file mode 100644
index 00000000000..7cde4a548b6
--- /dev/null
+++ b/.changeset/tricky-pears-check.md
@@ -0,0 +1,5 @@
+---
+"thirdweb": patch
+---
+
+Adds Humanity Testnet as a legacy transaction chain
diff --git a/packages/thirdweb/src/gas/fee-data.ts b/packages/thirdweb/src/gas/fee-data.ts
index e27b2c1f326..f9b90c8b962 100644
--- a/packages/thirdweb/src/gas/fee-data.ts
+++ b/packages/thirdweb/src/gas/fee-data.ts
@@ -37,6 +37,7 @@ const FORCE_GAS_PRICE_CHAIN_IDS = [
   2016, // MainnetZ Mainnet
   9768, // MainnetZ Testnet
   2442, // Polygon zkEVM Cardona Testnet
+  1942999413, // Humanity Testnet
 ];
 
 /**