diff --git a/.changeset/great-ears-joke.md b/.changeset/great-ears-joke.md
new file mode 100644
index 000000000..9ac4255cd
--- /dev/null
+++ b/.changeset/great-ears-joke.md
@@ -0,0 +1,5 @@
+---
+"@onflow/transport-http": patch
+---
+
+Fix keyId for HTTP get transaction request
diff --git a/packages/transport-http/src/send-get-transaction.js b/packages/transport-http/src/send-get-transaction.js
index 0ca52fa6b..a86f65be5 100644
--- a/packages/transport-http/src/send-get-transaction.js
+++ b/packages/transport-http/src/send-get-transaction.js
@@ -28,7 +28,7 @@ export async function sendGetTransaction(ix, context = {}, opts = {}) {
 
   const unwrapKey = key => ({
     address: key.address,
-    keyId: Number(key.key_id),
+    keyId: Number(key.key_index),
     sequenceNumber: Number(key.sequence_number),
   })
 
diff --git a/packages/transport-http/src/send-get-transaction.test.js b/packages/transport-http/src/send-get-transaction.test.js
index 6ccdfc390..9bd873b02 100644
--- a/packages/transport-http/src/send-get-transaction.test.js
+++ b/packages/transport-http/src/send-get-transaction.test.js
@@ -18,7 +18,7 @@ describe("Get Transaction", () => {
       gas_limit: "123",
       proposal_key: {
         address: "1654653399040a61",
-        key_id: "1",
+        key_index: "1",
         signer_index: "0",
         sequence_number: "1",
       },