diff --git a/package-lock.json b/package-lock.json
index 97be56e..0dc9939 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,8 +1,2303 @@
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+      "dev": true,
+      "dependencies": {
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+        "eslint-config-standard": "10.2.1",
+        "eslint-config-standard-jsx": "4.0.2",
+        "eslint-plugin-import": "~2.2.0",
+        "eslint-plugin-node": "~4.2.2",
+        "eslint-plugin-promise": "~3.5.0",
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+        "eslint-plugin-standard": "~3.0.1",
+        "standard-engine": "~7.0.0"
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+        "standard": "bin/cmd.js"
+      },
+      "engines": {
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+    },
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+      "resolved": "https://registry.npmjs.org/standard-engine/-/standard-engine-7.0.0.tgz",
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+      "dependencies": {
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+        "get-stdin": "^5.0.1",
+        "minimist": "^1.1.0",
+        "pkg-conf": "^2.0.0"
+      }
+    },
+    "node_modules/standard-engine/node_modules/minimist": {
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.0.tgz",
+      "integrity": "sha1-o1AIsg9BOD7sH7kU9M1d95omQoQ=",
+      "dev": true
+    },
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+      "dev": true,
+      "dependencies": {
+        "safe-buffer": "~5.1.0"
+      }
+    },
+    "node_modules/string-width": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/string-width/-/string-width-1.0.2.tgz",
+      "integrity": "sha1-EYvfW4zcUaKn5w0hHgfisLmxB9M=",
+      "dev": true,
+      "dependencies": {
+        "code-point-at": "^1.0.0",
+        "is-fullwidth-code-point": "^1.0.0",
+        "strip-ansi": "^3.0.0"
+      },
+      "engines": {
+        "node": ">=0.10.0"
+      }
+    },
+    "node_modules/string.prototype.trimleft": {
+      "version": "2.1.1",
+      "resolved": "https://registry.npmjs.org/string.prototype.trimleft/-/string.prototype.trimleft-2.1.1.tgz",
+      "integrity": "sha512-iu2AGd3PuP5Rp7x2kEZCrB2Nf41ehzh+goo8TV7z8/XDBbsvc6HQIlUl9RjkZ4oyrW1XM5UwlGl1oVEaDjg6Ag==",
+      "dev": true,
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+        "function-bind": "^1.1.1"
+      },
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+        "node": ">= 0.4"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/ljharb"
+      }
+    },
+    "node_modules/string.prototype.trimright": {
+      "version": "2.1.1",
+      "resolved": "https://registry.npmjs.org/string.prototype.trimright/-/string.prototype.trimright-2.1.1.tgz",
+      "integrity": "sha512-qFvWL3/+QIgZXVmJBfpHmxLB7xsUXz6HsUmP8+5dRaC3Q7oKUv9Vo6aMCRZC1smrtyECFsIT30PqBJ1gTjAs+g==",
+      "dev": true,
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+        "function-bind": "^1.1.1"
+      },
+      "engines": {
+        "node": ">= 0.4"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/ljharb"
+      }
+    },
+    "node_modules/strip-ansi": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-3.0.1.tgz",
+      "integrity": "sha1-ajhfuIU9lS1f8F0Oiq+UJ43GPc8=",
+      "dev": true,
+      "dependencies": {
+        "ansi-regex": "^2.0.0"
+      },
+      "engines": {
+        "node": ">=0.10.0"
+      }
+    },
+    "node_modules/strip-bom": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/strip-bom/-/strip-bom-3.0.0.tgz",
+      "integrity": "sha1-IzTBjpx1n3vdVv3vfprj1YjmjtM=",
+      "dev": true,
+      "engines": {
+        "node": ">=4"
+      }
+    },
+    "node_modules/strip-json-comments": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/strip-json-comments/-/strip-json-comments-2.0.1.tgz",
+      "integrity": "sha1-PFMZQukIwml8DsNEhYwobHygpgo=",
+      "dev": true,
+      "engines": {
+        "node": ">=0.10.0"
+      }
+    },
+    "node_modules/supports-color": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-2.0.0.tgz",
+      "integrity": "sha1-U10EXOa2Nj+kARcIRimZXp3zJMc=",
+      "dev": true,
+      "engines": {
+        "node": ">=0.8.0"
+      }
+    },
+    "node_modules/table": {
+      "version": "3.8.3",
+      "resolved": "https://registry.npmjs.org/table/-/table-3.8.3.tgz",
+      "integrity": "sha1-K7xULw/amGGnVdOUf+/Ys/UThV8=",
+      "dev": true,
+      "dependencies": {
+        "ajv": "^4.7.0",
+        "ajv-keywords": "^1.0.0",
+        "chalk": "^1.1.1",
+        "lodash": "^4.0.0",
+        "slice-ansi": "0.0.4",
+        "string-width": "^2.0.0"
+      }
+    },
+    "node_modules/table/node_modules/ansi-regex": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-3.0.0.tgz",
+      "integrity": "sha1-7QMXwyIGT3lGbAKWa922Bas32Zg=",
+      "dev": true,
+      "engines": {
+        "node": ">=4"
+      }
+    },
+    "node_modules/table/node_modules/is-fullwidth-code-point": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/is-fullwidth-code-point/-/is-fullwidth-code-point-2.0.0.tgz",
+      "integrity": "sha1-o7MKXE8ZkYMWeqq5O+764937ZU8=",
+      "dev": true,
+      "engines": {
+        "node": ">=4"
+      }
+    },
+    "node_modules/table/node_modules/string-width": {
+      "version": "2.1.1",
+      "resolved": "https://registry.npmjs.org/string-width/-/string-width-2.1.1.tgz",
+      "integrity": "sha512-nOqH59deCq9SRHlxq1Aw85Jnt4w6KvLKqWVik6oA9ZklXLNIOlqg4F2yrT1MVaTjAqvVwdfeZ7w7aCvJD7ugkw==",
+      "dev": true,
+      "dependencies": {
+        "is-fullwidth-code-point": "^2.0.0",
+        "strip-ansi": "^4.0.0"
+      },
+      "engines": {
+        "node": ">=4"
+      }
+    },
+    "node_modules/table/node_modules/strip-ansi": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-4.0.0.tgz",
+      "integrity": "sha1-qEeQIusaw2iocTibY1JixQXuNo8=",
+      "dev": true,
+      "dependencies": {
+        "ansi-regex": "^3.0.0"
+      },
+      "engines": {
+        "node": ">=4"
+      }
+    },
+    "node_modules/text-table": {
+      "version": "0.2.0",
+      "resolved": "https://registry.npmjs.org/text-table/-/text-table-0.2.0.tgz",
+      "integrity": "sha1-f17oI66AUgfACvLfSoTsP8+lcLQ=",
+      "dev": true
+    },
+    "node_modules/through": {
+      "version": "2.3.8",
+      "resolved": "https://registry.npmjs.org/through/-/through-2.3.8.tgz",
+      "integrity": "sha1-DdTJ/6q8NXlgsbckEV1+Doai4fU=",
+      "dev": true
+    },
+    "node_modules/type": {
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/type/-/type-1.2.0.tgz",
+      "integrity": "sha512-+5nt5AAniqsCnu2cEQQdpzCAh33kVx8n0VoFidKpB1dVVLAN/F+bgVOqOJqOnEnrhp222clB5p3vUlD+1QAnfg==",
+      "dev": true
+    },
+    "node_modules/type-check": {
+      "version": "0.3.2",
+      "resolved": "https://registry.npmjs.org/type-check/-/type-check-0.3.2.tgz",
+      "integrity": "sha1-WITKtRLPHTVeP7eE8wgEsrUg23I=",
+      "dev": true,
+      "dependencies": {
+        "prelude-ls": "~1.1.2"
+      },
+      "engines": {
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+      }
+    },
+    "node_modules/typedarray": {
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+      "resolved": "https://registry.npmjs.org/typedarray/-/typedarray-0.0.6.tgz",
+      "integrity": "sha1-hnrHTjhkGHsdPUfZlqeOxciDB3c=",
+      "dev": true
+    },
+    "node_modules/typescript": {
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+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.9.10.tgz",
+      "integrity": "sha512-w6fIxVE/H1PkLKcCPsFqKE7Kv7QUwhU8qQY2MueZXWx5cPZdwFupLgKK3vntcK98BtNHZtAF4LA/yl2a7k8R6Q==",
+      "dev": true,
+      "bin": {
+        "tsc": "bin/tsc",
+        "tsserver": "bin/tsserver"
+      },
+      "engines": {
+        "node": ">=4.2.0"
+      }
+    },
+    "node_modules/uniq": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/uniq/-/uniq-1.0.1.tgz",
+      "integrity": "sha1-sxxa6CVIRKOoKBVBzisEuGWnNP8=",
+      "dev": true
+    },
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+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/user-home/-/user-home-2.0.0.tgz",
+      "integrity": "sha1-nHC/2Babwdy/SGBODwS4tJzenp8=",
+      "dev": true,
+      "dependencies": {
+        "os-homedir": "^1.0.0"
+      },
+      "engines": {
+        "node": ">=0.10.0"
+      }
+    },
+    "node_modules/util-deprecate": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
+      "integrity": "sha1-RQ1Nyfpw3nMnYvvS1KKJgUGaDM8=",
+      "dev": true
+    },
+    "node_modules/word-wrap": {
+      "version": "1.2.3",
+      "resolved": "https://registry.npmjs.org/word-wrap/-/word-wrap-1.2.3.tgz",
+      "integrity": "sha512-Hz/mrNwitNRh/HUAtM/VT/5VH+ygD6DV7mYKZAtHOrbs8U7lvPS6xf7EJKMF0uW1KJCl0H701g3ZGus+muE5vQ==",
+      "dev": true,
+      "engines": {
+        "node": ">=0.10.0"
+      }
+    },
+    "node_modules/wrappy": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
+      "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8=",
+      "dev": true
+    },
+    "node_modules/write": {
+      "version": "0.2.1",
+      "resolved": "https://registry.npmjs.org/write/-/write-0.2.1.tgz",
+      "integrity": "sha1-X8A4KOJkzqP+kUVUdvejxWbLB1c=",
+      "dev": true,
+      "dependencies": {
+        "mkdirp": "^0.5.1"
+      },
+      "engines": {
+        "node": ">=0.10.0"
+      }
+    },
+    "node_modules/xtend": {
+      "version": "4.0.2",
+      "resolved": "https://registry.npmjs.org/xtend/-/xtend-4.0.2.tgz",
+      "integrity": "sha512-LKYU1iAXJXUgAXn9URjiu+MWhyUXHsvfp7mcuYm9dSUKK0/CjtrUwFAxD82/mCWbtLsGjFIad0wIsod4zrTAEQ==",
+      "dev": true,
+      "engines": {
+        "node": ">=0.4"
+      }
+    },
+    "node_modules/yjs": {
+      "version": "13.5.11",
+      "resolved": "https://registry.npmjs.org/yjs/-/yjs-13.5.11.tgz",
+      "integrity": "sha512-nJzML0NoSUh+kZLEOssYViPI1ZECv/7rnLk5mhXvhMTnezNAYWAIfNLvo+FHYRhWBojbrutT4d2IAP/IE9Xaog==",
+      "dev": true,
+      "hasInstallScript": true,
+      "dependencies": {
+        "lib0": "^0.2.41"
+      },
+      "funding": {
+        "type": "GitHub Sponsors ❤",
+        "url": "https://github.com/sponsors/dmonad"
+      }
+    }
+  },
   "dependencies": {
     "@types/estree": {
       "version": "0.0.50",
@@ -62,7 +2357,8 @@
       "version": "1.5.1",
       "resolved": "https://registry.npmjs.org/ajv-keywords/-/ajv-keywords-1.5.1.tgz",
       "integrity": "sha1-MU3QpLM2j609/NxU7eYXG4htrzw=",
-      "dev": true
+      "dev": true,
+      "requires": {}
     },
     "ansi-escapes": {
       "version": "1.4.0",
@@ -485,13 +2781,15 @@
       "version": "10.2.1",
       "resolved": "https://registry.npmjs.org/eslint-config-standard/-/eslint-config-standard-10.2.1.tgz",
       "integrity": "sha1-wGHk0GbzedwXzVYsZOgZtN1FRZE=",
-      "dev": true
+      "dev": true,
+      "requires": {}
     },
     "eslint-config-standard-jsx": {
       "version": "4.0.2",
       "resolved": "https://registry.npmjs.org/eslint-config-standard-jsx/-/eslint-config-standard-jsx-4.0.2.tgz",
       "integrity": "sha512-F8fRh2WFnTek7dZH9ZaE0PCBwdVGkwVWZmizla/DDNOmg7Tx6B/IlK5+oYpiX29jpu73LszeJj5i1axEZv6VMw==",
-      "dev": true
+      "dev": true,
+      "requires": {}
     },
     "eslint-import-resolver-node": {
       "version": "0.2.3",
@@ -598,7 +2896,8 @@
       "version": "3.0.1",
       "resolved": "https://registry.npmjs.org/eslint-plugin-standard/-/eslint-plugin-standard-3.0.1.tgz",
       "integrity": "sha1-NNDJFbRe3G8BA5PH7vOCOwhWXPI=",
-      "dev": true
+      "dev": true,
+      "requires": {}
     },
     "espree": {
       "version": "3.5.4",
@@ -1604,6 +3903,15 @@
         }
       }
     },
+    "string_decoder": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.1.1.tgz",
+      "integrity": "sha512-n/ShnvDi6FHbbVfviro+WojiFzv+s8MPMHBczVePfUpDJLwoLT0ht1l4YwBCbi8pJAveEEdnkHyPyTP/mzRfwg==",
+      "dev": true,
+      "requires": {
+        "safe-buffer": "~5.1.0"
+      }
+    },
     "string-width": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/string-width/-/string-width-1.0.2.tgz",
@@ -1635,15 +3943,6 @@
         "function-bind": "^1.1.1"
       }
     },
-    "string_decoder": {
-      "version": "1.1.1",
-      "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.1.1.tgz",
-      "integrity": "sha512-n/ShnvDi6FHbbVfviro+WojiFzv+s8MPMHBczVePfUpDJLwoLT0ht1l4YwBCbi8pJAveEEdnkHyPyTP/mzRfwg==",
-      "dev": true,
-      "requires": {
-        "safe-buffer": "~5.1.0"
-      }
-    },
     "strip-ansi": {
       "version": "3.0.1",
       "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-3.0.1.tgz",
diff --git a/rollup.config.js b/rollup.config.js
index 55b6a6a..ad58695 100644
--- a/rollup.config.js
+++ b/rollup.config.js
@@ -1,27 +1,10 @@
 
-const paths = path => {
-  if (/^lib0\//.test(path)) {
-    return `lib0/dist/${path.slice(5, -3)}.cjs`
-  }
-  return path
-}
-
 export default [{
-  input: './tests/index.js',
-  output: {
-    file: './dist/test.cjs',
-    format: 'cjs',
-    sourcemap: true,
-    paths
-  },
-  external: id => /^(lib0|yjs|ioredis)/.test(id)
-}, {
   input: './src/y-redis.js',
   output: {
     file: './dist/y-redis.cjs',
     format: 'cjs',
-    sourcemap: true,
-    paths
+    sourcemap: true
   },
   external: id => /^(lib0|yjs|ioredis)/.test(id)
 }]
diff --git a/src/y-redis.js b/src/y-redis.js
index e982b25..8e4ebaa 100644
--- a/src/y-redis.js
+++ b/src/y-redis.js
@@ -1,9 +1,9 @@
 import * as Y from 'yjs'
-import * as mutex from 'lib0/mutex.js'
-import { Observable } from 'lib0/observable.js'
-import * as promise from 'lib0/promise.js'
-import * as error from 'lib0/error.js'
-import * as logging from 'lib0/logging.js'
+import * as mutex from 'lib0/mutex'
+import { Observable } from 'lib0/observable'
+import * as promise from 'lib0/promise'
+import * as error from 'lib0/error'
+import * as logging from 'lib0/logging'
 import Redis from 'ioredis'
 
 const logger = logging.createModuleLogger('y-redis')
diff --git a/tests/index.js b/tests/index.js
index b365515..4c64d81 100644
--- a/tests/index.js
+++ b/tests/index.js
@@ -1,8 +1,8 @@
 import * as redis from './y-redis.tests.js'
 
-import { runTests } from 'lib0/testing.js'
-import { isBrowser, isNode } from 'lib0/environment.js'
-import * as log from 'lib0/logging.js'
+import { runTests } from 'lib0/testing'
+import { isBrowser, isNode } from 'lib0/environment'
+import * as log from 'lib0/logging'
 
 if (isBrowser) {
   log.createVConsole(document.body)
diff --git a/tests/y-redis.tests.js b/tests/y-redis.tests.js
index 6f3e426..a829bb1 100644
--- a/tests/y-redis.tests.js
+++ b/tests/y-redis.tests.js
@@ -1,8 +1,8 @@
 
 import * as Y from 'yjs'
 import { RedisPersistence } from '../src/y-redis.js'
-import * as t from 'lib0/testing.js'
-import * as promise from 'lib0/promise.js'
+import * as t from 'lib0/testing'
+import * as promise from 'lib0/promise'
 import Redis from 'ioredis'
 
 /**