diff --git a/package.json b/package.json
index 0eef60ac..aab5607a 100644
--- a/package.json
+++ b/package.json
@@ -5,7 +5,7 @@
   "bugs": "https://github.com/oclif/plugin-update/issues",
   "dependencies": {
     "@oclif/color": "^0.1.0",
-    "@oclif/core": "^0.5.39",
+    "@oclif/core": "^1.0.1",
     "@types/semver": "^7.3.4",
     "cli-ux": "^5.5.1",
     "cross-spawn": "^7.0.3",
@@ -19,7 +19,6 @@
     "tar-fs": "^2.1.1"
   },
   "devDependencies": {
-    "@oclif/dev-cli": "^1.26.0",
     "@oclif/plugin-help": "^5.1.0",
     "@oclif/test": "^1.2.8",
     "@types/chai": "^4.2.15",
diff --git a/src/commands/update.ts b/src/commands/update.ts
index 9bb66b82..bd522ee0 100644
--- a/src/commands/update.ts
+++ b/src/commands/update.ts
@@ -85,25 +85,6 @@ export default class UpdateCommand extends Command {
     const http: typeof HTTP = require('http-call').HTTP
 
     cli.action.status = 'fetching manifest'
-    if (!this.config.scopedEnvVarTrue('USE_LEGACY_UPDATE')) {
-      try {
-        const newManifestUrl = this.config.s3Url(
-          this.s3ChannelManifestKey(
-            this.config.bin,
-            this.config.platform,
-            this.config.arch,
-            (this.config.pjson.oclif.update.s3 as any).folder,
-          ),
-        )
-        const {body} = await http.get<IManifest | string>(newManifestUrl)
-        if (typeof body === 'string') {
-          return JSON.parse(body)
-        }
-        return body
-      } catch (error: any) {
-        this.debug(error.message)
-      }
-    }
 
     try {
       const url = this.config.s3Url(this.config.s3Key('manifest', {
diff --git a/yarn.lock b/yarn.lock
index 248b58ab..a59b7e91 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -83,7 +83,7 @@
     supports-color "^5.4.0"
     tslib "^1"
 
-"@oclif/command@^1.5.10", "@oclif/command@^1.5.20", "@oclif/command@^1.6", "@oclif/command@^1.6.0", "@oclif/command@^1.8.0":
+"@oclif/command@^1.5.10", "@oclif/command@^1.5.20", "@oclif/command@^1.6", "@oclif/command@^1.6.0":
   version "1.8.0"
   resolved "https://registry.yarnpkg.com/@oclif/command/-/command-1.8.0.tgz#c1a499b10d26e9d1a611190a81005589accbb339"
   integrity sha512-5vwpq6kbvwkQwKqAoOU3L72GZ3Ta8RRrewKj9OJRolx28KLJJ8Dg9Rf7obRwt5jQA9bkYd8gqzMTrI7H3xLfaw==
@@ -95,7 +95,7 @@
     debug "^4.1.1"
     semver "^7.3.2"
 
-"@oclif/config@^1.12.6", "@oclif/config@^1.12.8", "@oclif/config@^1.15.1", "@oclif/config@^1.17.0":
+"@oclif/config@^1.12.6", "@oclif/config@^1.12.8", "@oclif/config@^1.15.1":
   version "1.17.0"
   resolved "https://registry.yarnpkg.com/@oclif/config/-/config-1.17.0.tgz#ba8639118633102a7e481760c50054623d09fcab"
   integrity sha512-Lmfuf6ubjQ4ifC/9bz1fSCHc6F6E653oyaRXxg+lgT4+bYf9bk+nqrUpAbrXyABkCqgIBiFr3J4zR/kiFdE1PA==
@@ -130,24 +130,28 @@
     widest-line "^3.1.0"
     wrap-ansi "^7.0.0"
 
-"@oclif/dev-cli@^1.26.0":
-  version "1.26.0"
-  resolved "https://registry.yarnpkg.com/@oclif/dev-cli/-/dev-cli-1.26.0.tgz#e3ec294b362c010ffc8948003d3770955c7951fd"
-  integrity sha512-272udZP+bG4qahoAcpWcMTJKiA+V42kRMqQM7n4tgW35brYb2UP5kK+p08PpF8sgSfRTV8MoJVJG9ax5kY82PA==
+"@oclif/core@^1.0.1":
+  version "1.0.1"
+  resolved "https://registry.npmjs.org/@oclif/core/-/core-1.0.1.tgz#e97fc5c234db1a745fb4468eb79cabeea5f84af9"
+  integrity sha512-ai9XwnEZ+P34VUtV+fX/6HmRbo5CXGdZjX3iK3PsY6O+KYeJBKVAkPCKLz0qtAHxx0HX4+Yj2wnmy+hTCx6HYQ==
   dependencies:
-    "@oclif/command" "^1.8.0"
-    "@oclif/config" "^1.17.0"
-    "@oclif/errors" "^1.3.3"
-    "@oclif/plugin-help" "^3.2.0"
-    cli-ux "^5.2.1"
+    "@oclif/linewrap" "^1.0.0"
+    chalk "^4.1.0"
+    clean-stack "^3.0.0"
+    cli-ux "^5.1.0"
     debug "^4.1.1"
-    find-yarn-workspace-root "^2.0.0"
-    fs-extra "^8.1"
-    github-slugger "^1.2.1"
-    lodash "^4.17.11"
-    normalize-package-data "^3.0.0"
-    qqjs "^0.3.10"
-    tslib "^2.0.3"
+    fs-extra "^9.0.1"
+    get-package-type "^0.1.0"
+    globby "^11.0.1"
+    indent-string "^4.0.0"
+    is-wsl "^2.1.1"
+    lodash.template "^4.4.0"
+    semver "^7.3.2"
+    string-width "^4.2.0"
+    strip-ansi "^6.0.0"
+    tslib "^2.0.0"
+    widest-line "^3.1.0"
+    wrap-ansi "^7.0.0"
 
 "@oclif/errors@^1.2.1", "@oclif/errors@^1.2.2", "@oclif/errors@^1.3.3":
   version "1.3.4"
@@ -200,22 +204,6 @@
     widest-line "^3.1.0"
     wrap-ansi "^4.0.0"
 
-"@oclif/plugin-help@^3.2.0":
-  version "3.2.3"
-  resolved "https://registry.yarnpkg.com/@oclif/plugin-help/-/plugin-help-3.2.3.tgz#cd24010e7eb326782843d3aa6d6b5a4affebb2c3"
-  integrity sha512-l2Pd0lbOMq4u/7xsl9hqISFqyR9gWEz/8+05xmrXFr67jXyS6EUCQB+mFBa0wepltrmJu0sAFg9AvA2mLaMMqQ==
-  dependencies:
-    "@oclif/command" "^1.5.20"
-    "@oclif/config" "^1.15.1"
-    "@oclif/errors" "^1.2.2"
-    chalk "^4.1.0"
-    indent-string "^4.0.0"
-    lodash.template "^4.4.0"
-    string-width "^4.2.0"
-    strip-ansi "^6.0.0"
-    widest-line "^3.1.0"
-    wrap-ansi "^4.0.0"
-
 "@oclif/plugin-help@^5.1.0":
   version "5.1.1"
   resolved "https://registry.yarnpkg.com/@oclif/plugin-help/-/plugin-help-5.1.1.tgz#d24bf4669ddfc9319d9844c7d210b606441216a3"
@@ -4861,11 +4849,6 @@ tslib@^2.0.0, tslib@^2.1.0:
   resolved "https://registry.yarnpkg.com/tslib/-/tslib-2.1.0.tgz#da60860f1c2ecaa5703ab7d39bc05b6bf988b97a"
   integrity sha512-hcVC3wYEziELGGmEEXue7D75zbwIIVUMWAVbHItGPx0ziyXxrOMQx4rQEVEV45Ut/1IotuEvwqPopzIOkDMf0A==
 
-tslib@^2.0.3:
-  version "2.3.1"
-  resolved "https://registry.yarnpkg.com/tslib/-/tslib-2.3.1.tgz#e8a335add5ceae51aa261d32a490158ef042ef01"
-  integrity sha512-77EbyPPpMz+FRFRuAFlWMtmgUWGe9UOG2Z25NqCwiIjRhOf5iKGuzSe5P2w1laq+FkRy4p+PCuVkJSGkzTEKVw==
-
 tsutils@^3.17.1:
   version "3.17.1"
   resolved "https://registry.yarnpkg.com/tsutils/-/tsutils-3.17.1.tgz#ed719917f11ca0dee586272b2ac49e015a2dd759"