diff --git a/dev/lib/syntax.js b/dev/lib/syntax.js
index baebe42..ba0b534 100644
--- a/dev/lib/syntax.js
+++ b/dev/lib/syntax.js
@@ -13,10 +13,8 @@ import {ok as assert} from 'devlop'
 import {blankLine} from 'micromark-core-commonmark'
 import {factorySpace} from 'micromark-factory-space'
 import {markdownLineEndingOrSpace} from 'micromark-util-character'
-import {codes} from 'micromark-util-symbol/codes.js'
-import {constants} from 'micromark-util-symbol/constants.js'
 import {normalizeIdentifier} from 'micromark-util-normalize-identifier'
-import {types} from 'micromark-util-symbol/types.js'
+import {codes, constants, types} from 'micromark-util-symbol'
 
 const indent = {tokenize: tokenizeIndent, partial: true}
 
diff --git a/package.json b/package.json
index 532ff11..d463728 100644
--- a/package.json
+++ b/package.json
@@ -39,20 +39,20 @@
   },
   "dependencies": {
     "devlop": "^1.0.0",
-    "micromark-core-commonmark": "^1.0.0",
-    "micromark-factory-space": "^1.0.0",
-    "micromark-util-character": "^1.0.0",
-    "micromark-util-normalize-identifier": "^1.0.0",
-    "micromark-util-sanitize-uri": "^1.0.0",
-    "micromark-util-symbol": "^1.0.0",
-    "micromark-util-types": "^1.0.0"
+    "micromark-core-commonmark": "^2.0.0",
+    "micromark-factory-space": "^2.0.0",
+    "micromark-util-character": "^2.0.0",
+    "micromark-util-normalize-identifier": "^2.0.0",
+    "micromark-util-sanitize-uri": "^2.0.0",
+    "micromark-util-symbol": "^2.0.0",
+    "micromark-util-types": "^2.0.0"
   },
   "devDependencies": {
     "@types/node": "^20.0.0",
     "c8": "^8.0.0",
     "create-gfm-fixtures": "^1.0.0",
-    "micromark": "^3.0.0",
-    "micromark-build": "^1.0.0",
+    "micromark": "^4.0.0",
+    "micromark-build": "^2.0.0",
     "prettier": "^2.0.0",
     "remark-cli": "^11.0.0",
     "remark-preset-wooorm": "^9.0.0",