diff --git a/content/_code-samples/escrow/websocket/account_objects-request-expiration.json b/content/_code-samples/escrow/websocket/account_objects-request-expiration.json
index cc1ed6a617..5f998c3074 100644
--- a/content/_code-samples/escrow/websocket/account_objects-request-expiration.json
+++ b/content/_code-samples/escrow/websocket/account_objects-request-expiration.json
@@ -2,6 +2,6 @@
   "id": 2,
   "command": "account_objects",
   "account": "r3wN3v2vTUkr5qd6daqDc2xE4LSysdVjkT",
-  "ledger": "validated",
+  "ledger_index": "validated",
   "type": "escrow"
 }
diff --git a/content/tutorials/production-readiness/reliable-transaction-submission.ja.md b/content/tutorials/production-readiness/reliable-transaction-submission.ja.md
index c8b6824197..26cd3c5465 100644
--- a/content/tutorials/production-readiness/reliable-transaction-submission.ja.md
+++ b/content/tutorials/production-readiness/reliable-transaction-submission.ja.md
@@ -201,7 +201,7 @@ JSON-RPC要求:
   "params": [
     {
       "account": "rG5Ro9e3uGEZVCh3zu5gB9ydKUskCs221W",
-      "ledger": "validated"
+      "ledger_index": "validated"
     }
   ]
 }
@@ -230,7 +230,7 @@ JSON-RPC要求:
 }
 ```
 
-この例では、最後に検証されたレジャーの時点において（要求の`"ledger": "validated"`と、応答の`"validated": "true"`を参照）、アカウントのシーケンスは**4**です（`"account_data"`の`"Sequence": 4`を参照）。
+この例では、最後に検証されたレジャーの時点において（要求の`"ledger_index": "validated"`と、応答の`"validated": "true"`を参照）、アカウントのシーケンスは**4**です（`"account_data"`の`"Sequence": 4`を参照）。
 
 アプリケーションが、このアカウントで署名された3つのトランザクションを送信する場合には、4、5、6のシーケンス番号を使用します。各トランザクションの検証を待たずに複数のトランザクションを送信するには、アプリケーションで継続的なアカウントシーケンス番号を使用します。
 
diff --git a/content/tutorials/production-readiness/reliable-transaction-submission.md b/content/tutorials/production-readiness/reliable-transaction-submission.md
index 803d52f16f..d768c1d7da 100644
--- a/content/tutorials/production-readiness/reliable-transaction-submission.md
+++ b/content/tutorials/production-readiness/reliable-transaction-submission.md
@@ -217,7 +217,7 @@ JSON-RPC Request:
   "params": [
     {
       "account": "rG5Ro9e3uGEZVCh3zu5gB9ydKUskCs221W",
-      "ledger": "validated"
+      "ledger_index": "validated"
     }
   ]
 }
@@ -246,7 +246,7 @@ Response body:
 }
 ```
 
-In this example, the account's sequence is **4** (note `"Sequence": 4`, in `"account_data"`) as of the last validated ledger (note `"ledger": "validated"` in the request, and `"validated": "true"` in the response).
+In this example, the account's sequence is **4** (note `"Sequence": 4`, in `"account_data"`) as of the last validated ledger (note `"ledger_index": "validated"` in the request, and `"validated": "true"` in the response).
 
 If an application were to submit three transactions signed by this account, they would use sequence numbers 4, 5, and 6.  To submit multiple transactions without waiting for validation of each, an application should keep a running account sequence number.
 
diff --git a/content/tutorials/use-tokens/freeze-a-trust-line.md b/content/tutorials/use-tokens/freeze-a-trust-line.md
index 20b3753ddc..1fd9175e6b 100644
--- a/content/tutorials/use-tokens/freeze-a-trust-line.md
+++ b/content/tutorials/use-tokens/freeze-a-trust-line.md
@@ -226,7 +226,7 @@ Example Request:
   "id": "example_check_individual_freeze",
   "command": "account_lines",
   "account": "rf1BiGeXwwQoi8Z2ueFYTEXSwuJYfV2Jpn",
-  "ledger": "validated",
+  "ledger_index": "validated",
   "peer": "rsA2LpzuawewSBQXkiju3YQTMzW13pAAdW"
 }