diff --git a/.changeset/loud-crabs-sin.md b/.changeset/loud-crabs-sin.md
new file mode 100644
index 0000000..1637f85
--- /dev/null
+++ b/.changeset/loud-crabs-sin.md
@@ -0,0 +1,5 @@
+---
+"@hydrofoil/vocabularies": patch
+---
+
+Exporting all prefixes caused all to be added to `vocabularies`
diff --git a/package-lock.json b/package-lock.json
index 0fd98d1..ad0c0fd 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -7905,7 +7905,7 @@
     },
     "src": {
       "name": "@hydrofoil/vocabularies",
-      "version": "2.0.0",
+      "version": "2.1.0",
       "license": "MIT",
       "dependencies": {
         "@hydrofoil/vocab-code": "^1.0.1",
diff --git a/src/index.ts b/src/index.ts
index 5a2a604..bb8b1f8 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,2 +1,4 @@
+import './register.js'
+
 export { default as prefixes } from './prefixes.js'
 export { vocabularies, loadFile } from './vocabularies.js'
diff --git a/src/prefixes.ts b/src/prefixes.ts
index 3a641b8..365a9fc 100644
--- a/src/prefixes.ts
+++ b/src/prefixes.ts
@@ -1,6 +1,4 @@
-import prefixes from '@zazuko/prefixes'
-
-const morePrefixes = {
+const prefixes = {
   code: 'https://code.described.at/',
   'hydra-box': 'http://hydra-box.org/schema/',
   'hyper-auth': 'https://hypermedia.app/auth#',
@@ -11,17 +9,4 @@ const morePrefixes = {
   hex: 'https://w3id.org/hydra/extension#',
 }
 
-Object.entries(morePrefixes)
-  .forEach(([prefix, namespace]) => {
-    prefixes[prefix] = namespace
-  })
-
-type LocalPrefixes = typeof morePrefixes
-
-declare module '@zazuko/prefixes/prefixes.js' {
-  // eslint-disable-next-line @typescript-eslint/no-empty-interface
-  interface Prefixes extends LocalPrefixes {
-  }
-}
-
 export default prefixes
diff --git a/src/register.ts b/src/register.ts
new file mode 100644
index 0000000..2878d60
--- /dev/null
+++ b/src/register.ts
@@ -0,0 +1,15 @@
+import prefixes from '@zazuko/prefixes'
+import morePrefixes from './prefixes.js'
+
+Object.entries(morePrefixes)
+  .forEach(([prefix, namespace]) => {
+    prefixes[prefix] = namespace
+  })
+
+type LocalPrefixes = typeof morePrefixes
+
+declare module '@zazuko/prefixes/prefixes.js' {
+  // eslint-disable-next-line @typescript-eslint/no-empty-interface
+  interface Prefixes extends LocalPrefixes {
+  }
+}