diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index b5441c01..922d48ef 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "4.38.0"
+  ".": "4.39.0"
 }
diff --git a/.stats.yml b/.stats.yml
index 7d050298..bca80a58 100644
--- a/.stats.yml
+++ b/.stats.yml
@@ -1,2 +1,2 @@
 configured_endpoints: 97
-openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/orb%2Forb-14d1c1e4560c65c7c62f23343268ece4476ae079cd01ba2e6b924efde5f97c3e.yml
+openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/orb%2Forb-e9785c0b77f4a91dd668d12d707abdaa63cc527029c9d62a92ac24ec40500d18.yml
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 068ec2c1..3dacf715 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,14 @@
 # Changelog
 
+## 4.39.0 (2024-11-27)
+
+Full Changelog: [v4.38.0...v4.39.0](https://github.com/orbcorp/orb-node/compare/v4.38.0...v4.39.0)
+
+### Features
+
+* **api:** api update ([#409](https://github.com/orbcorp/orb-node/issues/409)) ([30a2ecf](https://github.com/orbcorp/orb-node/commit/30a2ecf999de152100afb1ddb463dfcd394ce6c7))
+* **internal:** make git install file structure match npm ([#407](https://github.com/orbcorp/orb-node/issues/407)) ([caa97dd](https://github.com/orbcorp/orb-node/commit/caa97ddffd2b85f3a6c95963c9c20c5587edd18c))
+
 ## 4.38.0 (2024-11-26)
 
 Full Changelog: [v4.37.0...v4.38.0](https://github.com/orbcorp/orb-node/compare/v4.37.0...v4.38.0)
diff --git a/package.json b/package.json
index 51750d3d..30afdbe9 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "orb-billing",
-  "version": "4.38.0",
+  "version": "4.39.0",
   "description": "The official TypeScript library for the Orb API",
   "author": "Orb <team@withorb.com>",
   "types": "dist/index.d.ts",
@@ -18,7 +18,7 @@
     "build": "./scripts/build",
     "prepublishOnly": "echo 'to publish, run yarn build && (cd dist; yarn publish)' && exit 1",
     "format": "prettier --write --cache --cache-strategy metadata . !dist",
-    "prepare": "if ./scripts/utils/check-is-in-git-install.sh; then ./scripts/build; fi",
+    "prepare": "if ./scripts/utils/check-is-in-git-install.sh; then ./scripts/build && ./scripts/utils/git-swap.sh; fi",
     "tsn": "ts-node -r tsconfig-paths/register",
     "lint": "./scripts/lint",
     "fix": "./scripts/format"
diff --git a/scripts/utils/check-is-in-git-install.sh b/scripts/utils/check-is-in-git-install.sh
index 36bcedc2..1354eb43 100755
--- a/scripts/utils/check-is-in-git-install.sh
+++ b/scripts/utils/check-is-in-git-install.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # Check if you happen to call prepare for a repository that's already in node_modules.
 [ "$(basename "$(dirname "$PWD")")" = 'node_modules' ] ||
 # The name of the containing directory that 'npm` uses, which looks like
diff --git a/scripts/utils/git-swap.sh b/scripts/utils/git-swap.sh
new file mode 100755
index 00000000..79d1888e
--- /dev/null
+++ b/scripts/utils/git-swap.sh
@@ -0,0 +1,13 @@
+#!/usr/bin/env bash
+set -exuo pipefail
+# the package is published to NPM from ./dist
+# we want the final file structure for git installs to match the npm installs, so we
+
+# delete everything except ./dist and ./node_modules
+find . -maxdepth 1 -mindepth 1 ! -name 'dist' ! -name 'node_modules' -exec rm -rf '{}' +
+
+# move everything from ./dist to .
+mv dist/* .
+
+# delete the now-empty ./dist
+rmdir dist
diff --git a/src/resources/customers/credits/ledger.ts b/src/resources/customers/credits/ledger.ts
index 0ed829f8..fdc64ae9 100644
--- a/src/resources/customers/credits/ledger.ts
+++ b/src/resources/customers/credits/ledger.ts
@@ -616,7 +616,7 @@ export namespace LedgerListResponse {
      */
     metadata: Record<string, string>;
 
-    new_block_expiry_date: string;
+    new_block_expiry_date: string | null;
 
     starting_balance: number;
   }
@@ -999,7 +999,7 @@ export namespace LedgerCreateEntryResponse {
      */
     metadata: Record<string, string>;
 
-    new_block_expiry_date: string;
+    new_block_expiry_date: string | null;
 
     starting_balance: number;
   }
@@ -1382,7 +1382,7 @@ export namespace LedgerCreateEntryByExternalIDResponse {
      */
     metadata: Record<string, string>;
 
-    new_block_expiry_date: string;
+    new_block_expiry_date: string | null;
 
     starting_balance: number;
   }
@@ -1765,7 +1765,7 @@ export namespace LedgerListByExternalIDResponse {
      */
     metadata: Record<string, string>;
 
-    new_block_expiry_date: string;
+    new_block_expiry_date: string | null;
 
     starting_balance: number;
   }
diff --git a/src/version.ts b/src/version.ts
index e36007fb..b54588e2 100644
--- a/src/version.ts
+++ b/src/version.ts
@@ -1 +1 @@
-export const VERSION = '4.38.0'; // x-release-please-version
+export const VERSION = '4.39.0'; // x-release-please-version