diff --git a/.github/workflows/npm_publish.yml b/.github/workflows/npm_publish.yml
index c92e5a1..b889143 100644
--- a/.github/workflows/npm_publish.yml
+++ b/.github/workflows/npm_publish.yml
@@ -27,7 +27,7 @@ jobs:
 
       - name: Setup Deno
         # uses: denoland/setup-deno@v1
-        uses: denoland/setup-deno@9db7f66e8e16b5699a514448ce994936c63f0d54
+        uses: denoland/setup-deno
         with:
           deno-version: v1.x
 
@@ -38,9 +38,9 @@ jobs:
         if: startsWith(github.ref, 'refs/tags/')
         id: get_tag_version
         run: echo ::set-output name=TAG_VERSION::${GITHUB_REF/refs\/tags\//}
-      - uses: actions/setup-node@v2
+      - uses: actions/setup-node@v4
         with:
-          node-version: '18.x'
+          node-version: 18
           registry-url: 'https://registry.npmjs.org'
       - name: npm build
         run: deno run -A ./scripts/build_npm.ts ${{steps.get_tag_version.outputs.TAG_VERSION}}
diff --git a/deno.lock b/deno.lock
index 0218e25..4267168 100644
--- a/deno.lock
+++ b/deno.lock
@@ -53,6 +53,68 @@
     }
   },
   "remote": {
+    "https://deno.land/std@0.111.0/_util/assert.ts": "2f868145a042a11d5ad0a3c748dcf580add8a0dbc0e876eaa0026303a5488f58",
+    "https://deno.land/std@0.111.0/_util/os.ts": "dfb186cc4e968c770ab6cc3288bd65f4871be03b93beecae57d657232ecffcac",
+    "https://deno.land/std@0.111.0/bytes/bytes_list.ts": "3bff6a09c72b2e0b1e92e29bd3b135053894196cca07a2bba842901073efe5cb",
+    "https://deno.land/std@0.111.0/bytes/equals.ts": "69f55fdbd45c71f920c1a621e6c0865dc780cd8ae34e0f5e55a9497b70c31c1b",
+    "https://deno.land/std@0.111.0/bytes/mod.ts": "fedb80b8da2e7ad8dd251148e65f92a04c73d6c5a430b7d197dc39588c8dda6f",
+    "https://deno.land/std@0.111.0/fmt/colors.ts": "8368ddf2d48dfe413ffd04cdbb7ae6a1009cf0dccc9c7ff1d76259d9c61a0621",
+    "https://deno.land/std@0.111.0/fs/_util.ts": "f2ce811350236ea8c28450ed822a5f42a0892316515b1cd61321dec13569c56b",
+    "https://deno.land/std@0.111.0/fs/ensure_dir.ts": "b7c103dc41a3d1dbbb522bf183c519c37065fdc234831a4a0f7d671b1ed5fea7",
+    "https://deno.land/std@0.111.0/hash/sha256.ts": "bd85257c68d1fdd9da8457284c4fbb04efa9f4f2229b5f41a638d5b71a3a8d5c",
+    "https://deno.land/std@0.111.0/io/buffer.ts": "fdf93ba9e5d20ff3369e2c42443efd89131f8a73066f7f59c033cc588a0e2cfe",
+    "https://deno.land/std@0.111.0/path/_constants.ts": "1247fee4a79b70c89f23499691ef169b41b6ccf01887a0abd131009c5581b853",
+    "https://deno.land/std@0.111.0/path/_interface.ts": "1fa73b02aaa24867e481a48492b44f2598cd9dfa513c7b34001437007d3642e4",
+    "https://deno.land/std@0.111.0/path/_util.ts": "2e06a3b9e79beaf62687196bd4b60a4c391d862cfa007a20fc3a39f778ba073b",
+    "https://deno.land/std@0.111.0/path/common.ts": "f41a38a0719a1e85aa11c6ba3bea5e37c15dd009d705bd8873f94c833568cbc4",
+    "https://deno.land/std@0.111.0/path/glob.ts": "ea87985765b977cc284b92771003b2070c440e0807c90e1eb0ff3e095911a820",
+    "https://deno.land/std@0.111.0/path/mod.ts": "4465dc494f271b02569edbb4a18d727063b5dbd6ed84283ff906260970a15d12",
+    "https://deno.land/std@0.111.0/path/posix.ts": "34349174b9cd121625a2810837a82dd8b986bbaaad5ade690d1de75bbb4555b2",
+    "https://deno.land/std@0.111.0/path/separator.ts": "8fdcf289b1b76fd726a508f57d3370ca029ae6976fcde5044007f062e643ff1c",
+    "https://deno.land/std@0.111.0/path/win32.ts": "11549e8c6df8307a8efcfa47ad7b2a75da743eac7d4c89c9723a944661c8bd2e",
+    "https://deno.land/std@0.111.0/streams/conversion.ts": "fe0059ed9d3c53eda4ba44eb71a6a9acb98c5fdb5ba1b6c6ab28004724c7641b",
+    "https://deno.land/std@0.140.0/_util/assert.ts": "e94f2eb37cebd7f199952e242c77654e43333c1ac4c5c700e929ea3aa5489f74",
+    "https://deno.land/std@0.140.0/_util/os.ts": "3b4c6e27febd119d36a416d7a97bd3b0251b77c88942c8f16ee5953ea13e2e49",
+    "https://deno.land/std@0.140.0/fs/_util.ts": "0fb24eb4bfebc2c194fb1afdb42b9c3dda12e368f43e8f2321f84fc77d42cb0f",
+    "https://deno.land/std@0.140.0/fs/ensure_dir.ts": "9dc109c27df4098b9fc12d949612ae5c9c7169507660dcf9ad90631833209d9d",
+    "https://deno.land/std@0.140.0/fs/expand_glob.ts": "0c10130d67c9b02164b03df8e43c6d6defbf8e395cb69d09e84a8586e6d72ac3",
+    "https://deno.land/std@0.140.0/fs/walk.ts": "117403ccd21fd322febe56ba06053b1ad5064c802170f19b1ea43214088fe95f",
+    "https://deno.land/std@0.140.0/path/_constants.ts": "df1db3ffa6dd6d1252cc9617e5d72165cd2483df90e93833e13580687b6083c3",
+    "https://deno.land/std@0.140.0/path/_interface.ts": "ee3b431a336b80cf445441109d089b70d87d5e248f4f90ff906820889ecf8d09",
+    "https://deno.land/std@0.140.0/path/_util.ts": "c1e9686d0164e29f7d880b2158971d805b6e0efc3110d0b3e24e4b8af2190d2b",
+    "https://deno.land/std@0.140.0/path/common.ts": "bee563630abd2d97f99d83c96c2fa0cca7cee103e8cb4e7699ec4d5db7bd2633",
+    "https://deno.land/std@0.140.0/path/glob.ts": "cb5255638de1048973c3e69e420c77dc04f75755524cb3b2e160fe9277d939ee",
+    "https://deno.land/std@0.140.0/path/mod.ts": "d3e68d0abb393fb0bf94a6d07c46ec31dc755b544b13144dee931d8d5f06a52d",
+    "https://deno.land/std@0.140.0/path/posix.ts": "293cdaec3ecccec0a9cc2b534302dfe308adb6f10861fa183275d6695faace44",
+    "https://deno.land/std@0.140.0/path/separator.ts": "fe1816cb765a8068afb3e8f13ad272351c85cbc739af56dacfc7d93d710fe0f9",
+    "https://deno.land/std@0.140.0/path/win32.ts": "31811536855e19ba37a999cd8d1b62078235548d67902ece4aa6b814596dd757",
+    "https://deno.land/std@0.143.0/_util/assert.ts": "e94f2eb37cebd7f199952e242c77654e43333c1ac4c5c700e929ea3aa5489f74",
+    "https://deno.land/std@0.143.0/_util/os.ts": "3b4c6e27febd119d36a416d7a97bd3b0251b77c88942c8f16ee5953ea13e2e49",
+    "https://deno.land/std@0.143.0/path/_constants.ts": "df1db3ffa6dd6d1252cc9617e5d72165cd2483df90e93833e13580687b6083c3",
+    "https://deno.land/std@0.143.0/path/_interface.ts": "ee3b431a336b80cf445441109d089b70d87d5e248f4f90ff906820889ecf8d09",
+    "https://deno.land/std@0.143.0/path/_util.ts": "c1e9686d0164e29f7d880b2158971d805b6e0efc3110d0b3e24e4b8af2190d2b",
+    "https://deno.land/std@0.143.0/path/common.ts": "bee563630abd2d97f99d83c96c2fa0cca7cee103e8cb4e7699ec4d5db7bd2633",
+    "https://deno.land/std@0.143.0/path/glob.ts": "cb5255638de1048973c3e69e420c77dc04f75755524cb3b2e160fe9277d939ee",
+    "https://deno.land/std@0.143.0/path/mod.ts": "d3e68d0abb393fb0bf94a6d07c46ec31dc755b544b13144dee931d8d5f06a52d",
+    "https://deno.land/std@0.143.0/path/posix.ts": "293cdaec3ecccec0a9cc2b534302dfe308adb6f10861fa183275d6695faace44",
+    "https://deno.land/std@0.143.0/path/separator.ts": "fe1816cb765a8068afb3e8f13ad272351c85cbc739af56dacfc7d93d710fe0f9",
+    "https://deno.land/std@0.143.0/path/win32.ts": "31811536855e19ba37a999cd8d1b62078235548d67902ece4aa6b814596dd757",
+    "https://deno.land/std@0.165.0/_util/asserts.ts": "d0844e9b62510f89ce1f9878b046f6a57bf88f208a10304aab50efcb48365272",
+    "https://deno.land/std@0.165.0/_util/os.ts": "8a33345f74990e627b9dfe2de9b040004b08ea5146c7c9e8fe9a29070d193934",
+    "https://deno.land/std@0.165.0/fmt/colors.ts": "9e36a716611dcd2e4865adea9c4bec916b5c60caad4cdcdc630d4974e6bb8bd4",
+    "https://deno.land/std@0.165.0/fs/_util.ts": "fdc156f897197f261a1c096dcf8ff9267ed0ff42bd5b31f55053a4763a4bae3b",
+    "https://deno.land/std@0.165.0/fs/empty_dir.ts": "c15a0aaaf40f8c21cca902aa1e01a789ad0c2fd1b7e2eecf4957053c5dbf707f",
+    "https://deno.land/std@0.165.0/fs/expand_glob.ts": "d08678afa768881b055bdfb5cebe4f089f8db4513a4d2b0bbe748f5870d77ce3",
+    "https://deno.land/std@0.165.0/fs/walk.ts": "0a754cc4696a15bdb175380a4b7deff3eb65be9768cb11d91a4138beee35c2d7",
+    "https://deno.land/std@0.165.0/path/_constants.ts": "df1db3ffa6dd6d1252cc9617e5d72165cd2483df90e93833e13580687b6083c3",
+    "https://deno.land/std@0.165.0/path/_interface.ts": "ee3b431a336b80cf445441109d089b70d87d5e248f4f90ff906820889ecf8d09",
+    "https://deno.land/std@0.165.0/path/_util.ts": "d16be2a16e1204b65f9d0dfc54a9bc472cafe5f4a190b3c8471ec2016ccd1677",
+    "https://deno.land/std@0.165.0/path/common.ts": "bee563630abd2d97f99d83c96c2fa0cca7cee103e8cb4e7699ec4d5db7bd2633",
+    "https://deno.land/std@0.165.0/path/glob.ts": "cb5255638de1048973c3e69e420c77dc04f75755524cb3b2e160fe9277d939ee",
+    "https://deno.land/std@0.165.0/path/mod.ts": "56fec03ad0ebd61b6ab39ddb9b0ddb4c4a5c9f2f4f632e09dd37ec9ebfd722ac",
+    "https://deno.land/std@0.165.0/path/posix.ts": "6b63de7097e68c8663c84ccedc0fd977656eb134432d818ecd3a4e122638ac24",
+    "https://deno.land/std@0.165.0/path/separator.ts": "fe1816cb765a8068afb3e8f13ad272351c85cbc739af56dacfc7d93d710fe0f9",
+    "https://deno.land/std@0.165.0/path/win32.ts": "7cebd2bda6657371adc00061a1d23fdd87bcdf64b4843bb148b0b24c11b40f69",
     "https://deno.land/std@0.218.2/assert/_constants.ts": "a271e8ef5a573f1df8e822a6eb9d09df064ad66a4390f21b3e31f820a38e0975",
     "https://deno.land/std@0.218.2/assert/_diff.ts": "dcc63d94ca289aec80644030cf88ccbf7acaa6fbd7b0f22add93616b36593840",
     "https://deno.land/std@0.218.2/assert/_format.ts": "0ba808961bf678437fb486b56405b6fefad2cf87b5809667c781ddee8c32aff4",
@@ -84,6 +146,39 @@
     "https://deno.land/std@0.218.2/assert/mod.ts": "325df8c0683ad83a873b9691aa66b812d6275fc9fec0b2d180ac68a2c5efed3b",
     "https://deno.land/std@0.218.2/assert/unimplemented.ts": "47ca67d1c6dc53abd0bd729b71a31e0825fc452dbcd4fde4ca06789d5644e7fd",
     "https://deno.land/std@0.218.2/assert/unreachable.ts": "3670816a4ab3214349acb6730e3e6f5299021234657eefe05b48092f3848c270",
-    "https://deno.land/std@0.218.2/fmt/colors.ts": "d239d84620b921ea520125d778947881f62c50e78deef2657073840b8af9559a"
+    "https://deno.land/std@0.218.2/fmt/colors.ts": "d239d84620b921ea520125d778947881f62c50e78deef2657073840b8af9559a",
+    "https://deno.land/x/code_block_writer@11.0.3/mod.ts": "2c3448060e47c9d08604c8f40dee34343f553f33edcdfebbf648442be33205e5",
+    "https://deno.land/x/code_block_writer@11.0.3/utils/string_utils.ts": "60cb4ec8bd335bf241ef785ccec51e809d576ff8e8d29da43d2273b69ce2a6ff",
+    "https://deno.land/x/deno_cache@0.2.1/auth_tokens.ts": "01b94d25abd974153a3111653998b9a43c66d84a0e4b362fc5f4bbbf40a6e0f7",
+    "https://deno.land/x/deno_cache@0.2.1/cache.ts": "67e301c20161546fea45405316314f4c3d85cc7a367b2fb72042903f308f55b7",
+    "https://deno.land/x/deno_cache@0.2.1/deno_dir.ts": "e4dc68da5641aa337bcc06fb1df28fcb086b366dcbea7d8aaed7ac7c853fedb1",
+    "https://deno.land/x/deno_cache@0.2.1/deps.ts": "2ebaba0ad86fff8b9027c6afd4c3909a17cd8bf8c9e263151c980c15c56a18ee",
+    "https://deno.land/x/deno_cache@0.2.1/dirs.ts": "e07003fabed7112375d4a50040297aae768f9d06bb6c2655ca46880653b576b4",
+    "https://deno.land/x/deno_cache@0.2.1/disk_cache.ts": "d7a361f0683a032bcca28513a7bbedc28c77cfcc6719e6f6cea156c0ff1108df",
+    "https://deno.land/x/deno_cache@0.2.1/file_fetcher.ts": "352702994c190c45215f3b8086621e117e88bc2174b020faefb5eca653d71d6a",
+    "https://deno.land/x/deno_cache@0.2.1/http_cache.ts": "af1500149496e2d0acadec24569e2a9c86a3f600cceef045dcf6f5ce8de72b3a",
+    "https://deno.land/x/deno_cache@0.2.1/mod.ts": "709ab9d1068be5fd77b020b33e7a9394f1e9b453553b1e2336b72c90283cf3c0",
+    "https://deno.land/x/deno_cache@0.2.1/util.ts": "652479928551259731686686ff2df6f26bc04e8e4d311137b2bf3bc10f779f48",
+    "https://deno.land/x/dnt@0.32.1/lib/compiler.ts": "66312edd9d2544b6bc11dd0e9a615c6d0bf1beed7c9f9851521788009a9c04c9",
+    "https://deno.land/x/dnt@0.32.1/lib/compiler_transforms.ts": "316c24175fe6a5d7ac6bb1dd44d14ef8010ea5773a3ac918db4d64f986402d8b",
+    "https://deno.land/x/dnt@0.32.1/lib/mod.deps.ts": "c25911ebaf412c90dbfaf6b4d8afecb644dc3aa1927b7f10329e68080f3172a1",
+    "https://deno.land/x/dnt@0.32.1/lib/npm_ignore.ts": "ec1a4ca32c5c652c931635632c8fe0e5c8d6c20ab33518a3038fde9163f6da95",
+    "https://deno.land/x/dnt@0.32.1/lib/package_json.ts": "4b97608baf7a47cc1bcf1ba9311c07945614e31809c56021628bdb6fde312749",
+    "https://deno.land/x/dnt@0.32.1/lib/pkg/dnt_wasm.generated.js": "01dee649eb64416708be7caa720825068a8ee3bea44cccd8b1b320c7a38633ce",
+    "https://deno.land/x/dnt@0.32.1/lib/pkg/snippets/dnt-wasm-a15ef721fa5290c5/helpers.js": "2f623f83602d4fbb30caa63444b10e35b45e9c2b267e49585ec9bb790a4888d8",
+    "https://deno.land/x/dnt@0.32.1/lib/shims.ts": "a7bc7c5d43e067b12342be883205e694de1ed82c08d48f6a6037b62c23bff169",
+    "https://deno.land/x/dnt@0.32.1/lib/test_runner/get_test_runner_code.ts": "b3682b1a34fc39840dd765e993523efdc97e004186c631de6a2d1c6cec3ebe45",
+    "https://deno.land/x/dnt@0.32.1/lib/test_runner/test_runner.ts": "424589c9db2d5bbcb5c37190fe2676c9a9239e5a6ae8c4c4c22294e376b5de6d",
+    "https://deno.land/x/dnt@0.32.1/lib/transform.deps.ts": "c0c3cb56f4dbda74aa6f58d9ae9e8d870accc8d41647396f2634b0a14027b393",
+    "https://deno.land/x/dnt@0.32.1/lib/types.ts": "8506b5ced3921a6ac2a1d5a2bb381bfdbf818c68207f14a1a1fffbf48ee95886",
+    "https://deno.land/x/dnt@0.32.1/lib/utils.ts": "d2681d634dfa6bd4ad2a32ad15bd419f6f1f895e06c0bf479455fbf1c5f49cd9",
+    "https://deno.land/x/dnt@0.32.1/mod.ts": "837d24f488fb2f80d4ec6882e85ca0bd41bcb351d23b44132d3840ef2eff8069",
+    "https://deno.land/x/dnt@0.32.1/transform.ts": "a5f81749ecc145af0730e348d5bb3b9b9c7b922822453561feecbdb0d5462b34",
+    "https://deno.land/x/ts_morph@17.0.1/bootstrap/mod.ts": "b53aad517f106c4079971fcd4a81ab79fadc40b50061a3ab2b741a09119d51e9",
+    "https://deno.land/x/ts_morph@17.0.1/bootstrap/ts_morph_bootstrap.js": "91a954daa993c5acb3361aa5279394f81ea6fe18b3854345c86111b336491cfc",
+    "https://deno.land/x/ts_morph@17.0.1/common/DenoRuntime.ts": "537800e840d0994f9055164e11bf33eadf96419246af0d3c453793c3ae67bdb3",
+    "https://deno.land/x/ts_morph@17.0.1/common/mod.ts": "01985d2ee7da8d1caee318a9d07664774fbee4e31602bc2bb6bb62c3489555ed",
+    "https://deno.land/x/ts_morph@17.0.1/common/ts_morph_common.js": "49a79124b941ba2b35d81ac9eb90fc33c957b2640cdb97569c1941bac5a3bbdb",
+    "https://deno.land/x/ts_morph@17.0.1/common/typescript.js": "5dd669eb199ee2a539924c63a92e23d95df43dfe2fbe3a9d68c871648be1ad5e"
   }
 }
diff --git a/util/flatten.ts b/util/flatten.ts
index 3004abf..2263acf 100644
--- a/util/flatten.ts
+++ b/util/flatten.ts
@@ -229,7 +229,11 @@ export class Flattened {
 					const { value_type: new_value_type } = this.getType(key, value);
 
 					value_type = new_value_type;
-					key_part = this.encodeKeyPart(key, manual_value_type, value_type);
+					key_part = this.encodeKeyPart(
+						key,
+						manual_value_type as "index",
+						value_type,
+					);
 					break;
 				}
 				case isString(value):