diff --git a/src/client/app/common/views/components/mfm.ts b/src/client/app/common/views/components/mfm.ts
index d734680bf..5ae210491 100644
--- a/src/client/app/common/views/components/mfm.ts
+++ b/src/client/app/common/views/components/mfm.ts
@@ -1,6 +1,6 @@
 import Vue, { VNode } from 'vue';
 import { length } from 'stringz';
-import { MfmForest } from '../../../../../mfm/parser';
+import { MfmForest } from '../../../../../mfm/types';
 import parse from '../../../../../mfm/parse';
 import MkUrl from './url.vue';
 import MkMention from './mention.vue';
diff --git a/src/mfm/html.ts b/src/mfm/html.ts
index 61d2d7b5a..ceaf3e421 100644
--- a/src/mfm/html.ts
+++ b/src/mfm/html.ts
@@ -3,7 +3,7 @@ const { JSDOM } = jsdom;
 import config from '../config';
 import { INote } from '../models/note';
 import { intersperse } from '../prelude/array';
-import { MfmForest, MfmTree } from './parser';
+import { MfmForest, MfmTree } from './types';
 
 export default (tokens: MfmForest, mentionedRemoteUsers: INote['mentionedRemoteUsers'] = []) => {
 	if (tokens == null) {
diff --git a/src/mfm/normalize.ts b/src/mfm/normalize.ts
index 9d5f0dab5..732c3085a 100644
--- a/src/mfm/normalize.ts
+++ b/src/mfm/normalize.ts
@@ -1,6 +1,6 @@
 import * as A from '../prelude/array';
 import * as S from '../prelude/string';
-import { MfmForest, MfmTree } from './parser';
+import { MfmForest, MfmTree } from './types';
 import { createTree, createLeaf } from '../prelude/tree';
 
 function isEmptyTextTree(t: MfmTree): boolean {
diff --git a/src/mfm/parse.ts b/src/mfm/parse.ts
index 2d796f500..71e3f25f0 100644
--- a/src/mfm/parse.ts
+++ b/src/mfm/parse.ts
@@ -1,4 +1,5 @@
-import parser, { plainParser, MfmForest } from './parser';
+import parser, { plainParser } from './parser';
+import { MfmForest } from './types';
 import { normalize } from './normalize';
 
 export default (source: string, plainText = false): MfmForest => {
diff --git a/src/mfm/parser.ts b/src/mfm/parser.ts
index 3c917f8d0..6ff0ad396 100644
--- a/src/mfm/parser.ts
+++ b/src/mfm/parser.ts
@@ -2,46 +2,10 @@ import * as P from 'parsimmon';
 import parseAcct from '../misc/acct/parse';
 import { toUnicode } from 'punycode';
 import { takeWhile, cumulativeSum } from '../prelude/array';
-import { Tree } from '../prelude/tree';
-import * as T from '../prelude/tree';
+import { createLeaf, createTree } from './types';
 
 const emojiRegex = /((?:\ud83d[\udc68\udc69])(?:\ud83c[\udffb-\udfff])?\u200d(?:\u2695\ufe0f|\u2696\ufe0f|\u2708\ufe0f|\ud83c[\udf3e\udf73\udf93\udfa4\udfa8\udfeb\udfed]|\ud83d[\udcbb\udcbc\udd27\udd2c\ude80\ude92]|\ud83e[\uddb0-\uddb3])|(?:\ud83c[\udfcb\udfcc]|\ud83d[\udd74\udd75]|\u26f9)((?:\ud83c[\udffb-\udfff]|\ufe0f)\u200d[\u2640\u2642]\ufe0f)|(?:\ud83c[\udfc3\udfc4\udfca]|\ud83d[\udc6e\udc71\udc73\udc77\udc81\udc82\udc86\udc87\ude45-\ude47\ude4b\ude4d\ude4e\udea3\udeb4-\udeb6]|\ud83e[\udd26\udd35\udd37-\udd39\udd3d\udd3e\uddb8\uddb9\uddd6-\udddd])(?:\ud83c[\udffb-\udfff])?\u200d[\u2640\u2642]\ufe0f|(?:\ud83d\udc68\u200d\u2764\ufe0f\u200d\ud83d\udc8b\u200d\ud83d\udc68|\ud83d\udc68\u200d\ud83d\udc68\u200d\ud83d\udc66\u200d\ud83d\udc66|\ud83d\udc68\u200d\ud83d\udc68\u200d\ud83d\udc67\u200d\ud83d[\udc66\udc67]|\ud83d\udc68\u200d\ud83d\udc69\u200d\ud83d\udc66\u200d\ud83d\udc66|\ud83d\udc68\u200d\ud83d\udc69\u200d\ud83d\udc67\u200d\ud83d[\udc66\udc67]|\ud83d\udc69\u200d\u2764\ufe0f\u200d\ud83d\udc8b\u200d\ud83d[\udc68\udc69]|\ud83d\udc69\u200d\ud83d\udc69\u200d\ud83d\udc66\u200d\ud83d\udc66|\ud83d\udc69\u200d\ud83d\udc69\u200d\ud83d\udc67\u200d\ud83d[\udc66\udc67]|\ud83d\udc68\u200d\u2764\ufe0f\u200d\ud83d\udc68|\ud83d\udc68\u200d\ud83d\udc66\u200d\ud83d\udc66|\ud83d\udc68\u200d\ud83d\udc67\u200d\ud83d[\udc66\udc67]|\ud83d\udc68\u200d\ud83d\udc68\u200d\ud83d[\udc66\udc67]|\ud83d\udc68\u200d\ud83d\udc69\u200d\ud83d[\udc66\udc67]|\ud83d\udc69\u200d\u2764\ufe0f\u200d\ud83d[\udc68\udc69]|\ud83d\udc69\u200d\ud83d\udc66\u200d\ud83d\udc66|\ud83d\udc69\u200d\ud83d\udc67\u200d\ud83d[\udc66\udc67]|\ud83d\udc69\u200d\ud83d\udc69\u200d\ud83d[\udc66\udc67]|\ud83c\udff3\ufe0f\u200d\ud83c\udf08|\ud83c\udff4\u200d\u2620\ufe0f|\ud83d\udc41\u200d\ud83d\udde8|\ud83d\udc68\u200d\ud83d[\udc66\udc67]|\ud83d\udc69\u200d\ud83d[\udc66\udc67]|\ud83d\udc6f\u200d\u2640\ufe0f|\ud83d\udc6f\u200d\u2642\ufe0f|\ud83e\udd3c\u200d\u2640\ufe0f|\ud83e\udd3c\u200d\u2642\ufe0f|\ud83e\uddde\u200d\u2640\ufe0f|\ud83e\uddde\u200d\u2642\ufe0f|\ud83e\udddf\u200d\u2640\ufe0f|\ud83e\udddf\u200d\u2642\ufe0f)|[\u0023\u002a\u0030-\u0039]\ufe0f?\u20e3|(?:[\u00a9\u00ae\u2122\u265f]\ufe0f)|(?:\ud83c[\udc04\udd70\udd71\udd7e\udd7f\ude02\ude1a\ude2f\ude37\udf21\udf24-\udf2c\udf36\udf7d\udf96\udf97\udf99-\udf9b\udf9e\udf9f\udfcd\udfce\udfd4-\udfdf\udff3\udff5\udff7]|\ud83d[\udc3f\udc41\udcfd\udd49\udd4a\udd6f\udd70\udd73\udd76-\udd79\udd87\udd8a-\udd8d\udda5\udda8\uddb1\uddb2\uddbc\uddc2-\uddc4\uddd1-\uddd3\udddc-\uddde\udde1\udde3\udde8\uddef\uddf3\uddfa\udecb\udecd-\udecf\udee0-\udee5\udee9\udef0\udef3]|[\u203c\u2049\u2139\u2194-\u2199\u21a9\u21aa\u231a\u231b\u2328\u23cf\u23ed-\u23ef\u23f1\u23f2\u23f8-\u23fa\u24c2\u25aa\u25ab\u25b6\u25c0\u25fb-\u25fe\u2600-\u2604\u260e\u2611\u2614\u2615\u2618\u2620\u2622\u2623\u2626\u262a\u262e\u262f\u2638-\u263a\u2640\u2642\u2648-\u2653\u2660\u2663\u2665\u2666\u2668\u267b\u267f\u2692-\u2697\u2699\u269b\u269c\u26a0\u26a1\u26aa\u26ab\u26b0\u26b1\u26bd\u26be\u26c4\u26c5\u26c8\u26cf\u26d1\u26d3\u26d4\u26e9\u26ea\u26f0-\u26f5\u26f8\u26fa\u26fd\u2702\u2708\u2709\u270f\u2712\u2714\u2716\u271d\u2721\u2733\u2734\u2744\u2747\u2757\u2763\u2764\u27a1\u2934\u2935\u2b05-\u2b07\u2b1b\u2b1c\u2b50\u2b55\u3030\u303d\u3297\u3299])(?:\ufe0f|(?!\ufe0e))|(?:(?:\ud83c[\udfcb\udfcc]|\ud83d[\udd74\udd75\udd90]|[\u261d\u26f7\u26f9\u270c\u270d])(?:\ufe0f|(?!\ufe0e))|(?:\ud83c[\udf85\udfc2-\udfc4\udfc7\udfca]|\ud83d[\udc42\udc43\udc46-\udc50\udc66-\udc69\udc6e\udc70-\udc78\udc7c\udc81-\udc83\udc85-\udc87\udcaa\udd7a\udd95\udd96\ude45-\ude47\ude4b-\ude4f\udea3\udeb4-\udeb6\udec0\udecc]|\ud83e[\udd18-\udd1c\udd1e\udd1f\udd26\udd30-\udd39\udd3d\udd3e\uddb5\uddb6\uddb8\uddb9\uddd1-\udddd]|[\u270a\u270b]))(?:\ud83c[\udffb-\udfff])?|(?:\ud83c\udff4\udb40\udc67\udb40\udc62\udb40\udc65\udb40\udc6e\udb40\udc67\udb40\udc7f|\ud83c\udff4\udb40\udc67\udb40\udc62\udb40\udc73\udb40\udc63\udb40\udc74\udb40\udc7f|\ud83c\udff4\udb40\udc67\udb40\udc62\udb40\udc77\udb40\udc6c\udb40\udc73\udb40\udc7f|\ud83c\udde6\ud83c[\udde8-\uddec\uddee\uddf1\uddf2\uddf4\uddf6-\uddfa\uddfc\uddfd\uddff]|\ud83c\udde7\ud83c[\udde6\udde7\udde9-\uddef\uddf1-\uddf4\uddf6-\uddf9\uddfb\uddfc\uddfe\uddff]|\ud83c\udde8\ud83c[\udde6\udde8\udde9\uddeb-\uddee\uddf0-\uddf5\uddf7\uddfa-\uddff]|\ud83c\udde9\ud83c[\uddea\uddec\uddef\uddf0\uddf2\uddf4\uddff]|\ud83c\uddea\ud83c[\udde6\udde8\uddea\uddec\udded\uddf7-\uddfa]|\ud83c\uddeb\ud83c[\uddee-\uddf0\uddf2\uddf4\uddf7]|\ud83c\uddec\ud83c[\udde6\udde7\udde9-\uddee\uddf1-\uddf3\uddf5-\uddfa\uddfc\uddfe]|\ud83c\udded\ud83c[\uddf0\uddf2\uddf3\uddf7\uddf9\uddfa]|\ud83c\uddee\ud83c[\udde8-\uddea\uddf1-\uddf4\uddf6-\uddf9]|\ud83c\uddef\ud83c[\uddea\uddf2\uddf4\uddf5]|\ud83c\uddf0\ud83c[\uddea\uddec-\uddee\uddf2\uddf3\uddf5\uddf7\uddfc\uddfe\uddff]|\ud83c\uddf1\ud83c[\udde6-\udde8\uddee\uddf0\uddf7-\uddfb\uddfe]|\ud83c\uddf2\ud83c[\udde6\udde8-\udded\uddf0-\uddff]|\ud83c\uddf3\ud83c[\udde6\udde8\uddea-\uddec\uddee\uddf1\uddf4\uddf5\uddf7\uddfa\uddff]|\ud83c\uddf4\ud83c\uddf2|\ud83c\uddf5\ud83c[\udde6\uddea-\udded\uddf0-\uddf3\uddf7-\uddf9\uddfc\uddfe]|\ud83c\uddf6\ud83c\udde6|\ud83c\uddf7\ud83c[\uddea\uddf4\uddf8\uddfa\uddfc]|\ud83c\uddf8\ud83c[\udde6-\uddea\uddec-\uddf4\uddf7-\uddf9\uddfb\uddfd-\uddff]|\ud83c\uddf9\ud83c[\udde6\udde8\udde9\uddeb-\udded\uddef-\uddf4\uddf7\uddf9\uddfb\uddfc\uddff]|\ud83c\uddfa\ud83c[\udde6\uddec\uddf2\uddf3\uddf8\uddfe\uddff]|\ud83c\uddfb\ud83c[\udde6\udde8\uddea\uddec\uddee\uddf3\uddfa]|\ud83c\uddfc\ud83c[\uddeb\uddf8]|\ud83c\uddfd\ud83c\uddf0|\ud83c\uddfe\ud83c[\uddea\uddf9]|\ud83c\uddff\ud83c[\udde6\uddf2\uddfc]|\ud83c[\udccf\udd8e\udd91-\udd9a\udde6-\uddff\ude01\ude32-\ude36\ude38-\ude3a\ude50\ude51\udf00-\udf20\udf2d-\udf35\udf37-\udf7c\udf7e-\udf84\udf86-\udf93\udfa0-\udfc1\udfc5\udfc6\udfc8\udfc9\udfcf-\udfd3\udfe0-\udff0\udff4\udff8-\udfff]|\ud83d[\udc00-\udc3e\udc40\udc44\udc45\udc51-\udc65\udc6a-\udc6d\udc6f\udc79-\udc7b\udc7d-\udc80\udc84\udc88-\udca9\udcab-\udcfc\udcff-\udd3d\udd4b-\udd4e\udd50-\udd67\udda4\uddfb-\ude44\ude48-\ude4a\ude80-\udea2\udea4-\udeb3\udeb7-\udebf\udec1-\udec5\uded0-\uded2\udeeb\udeec\udef4-\udef9]|\ud83e[\udd10-\udd17\udd1d\udd20-\udd25\udd27-\udd2f\udd3a\udd3c\udd40-\udd45\udd47-\udd70\udd73-\udd76\udd7a\udd7c-\udda2\uddb4\uddb7\uddc0-\uddc2\uddd0\uddde-\uddff]|[\u23e9-\u23ec\u23f0\u23f3\u267e\u26ce\u2705\u2728\u274c\u274e\u2753-\u2755\u2795-\u2797\u27b0\u27bf\ue50a])|\ufe0f)/;
 
-type Node<T, P> = { type: T, props: P };
-
-export type MentionNode = Node<'mention', {
-	canonical: string,
-	username: string,
-	host: string,
-	acct: string
-}>;
-
-export type HashtagNode = Node<'hashtag', {
-	hashtag: string
-}>;
-
-export type EmojiNode = Node<'emoji', {
-	name: string
-}>;
-
-export type MfmNode =
-	MentionNode |
-	HashtagNode |
-	EmojiNode |
-	Node<string, any>;
-
-export type MfmTree = Tree<MfmNode>;
-
-export type MfmForest = MfmTree[];
-
-export function createLeaf(type: string, props: any): MfmTree {
-	return T.createLeaf({ type, props });
-}
-
-export function createTree(type: string, children: MfmForest, props: any): MfmTree {
-	return T.createTree({ type, props }, children);
-}
-
 export function removeOrphanedBrackets(s: string): string {
 	const openBrackets = ['(', '「'];
 	const closeBrackets = [')', '」'];
diff --git a/src/mfm/types.ts b/src/mfm/types.ts
new file mode 100644
index 000000000..2c690f317
--- /dev/null
+++ b/src/mfm/types.ts
@@ -0,0 +1,37 @@
+import { Tree } from '../prelude/tree';
+import * as T from '../prelude/tree';
+
+type Node<T, P> = { type: T, props: P };
+
+export type MentionNode = Node<'mention', {
+	canonical: string,
+	username: string,
+	host: string,
+	acct: string
+}>;
+
+export type HashtagNode = Node<'hashtag', {
+	hashtag: string
+}>;
+
+export type EmojiNode = Node<'emoji', {
+	name: string
+}>;
+
+export type MfmNode =
+	MentionNode |
+	HashtagNode |
+	EmojiNode |
+	Node<string, any>;
+
+export type MfmTree = Tree<MfmNode>;
+
+export type MfmForest = MfmTree[];
+
+export function createLeaf(type: string, props: any): MfmTree {
+	return T.createLeaf({ type, props });
+}
+
+export function createTree(type: string, children: MfmForest, props: any): MfmTree {
+	return T.createTree({ type, props }, children);
+}
diff --git a/src/misc/extract-emojis.ts b/src/misc/extract-emojis.ts
index a7b949f4f..ba810b5f5 100644
--- a/src/misc/extract-emojis.ts
+++ b/src/misc/extract-emojis.ts
@@ -1,4 +1,4 @@
-import { EmojiNode, MfmForest } from '../mfm/parser';
+import { EmojiNode, MfmForest } from '../mfm/types';
 import { preorderF } from '../prelude/tree';
 import { unique } from '../prelude/array';
 
diff --git a/src/misc/extract-hashtags.ts b/src/misc/extract-hashtags.ts
index 43eaa4590..a6b801a7a 100644
--- a/src/misc/extract-hashtags.ts
+++ b/src/misc/extract-hashtags.ts
@@ -1,4 +1,4 @@
-import { HashtagNode, MfmForest } from '../mfm/parser';
+import { HashtagNode, MfmForest } from '../mfm/types';
 import { preorderF } from '../prelude/tree';
 import { unique } from '../prelude/array';
 
diff --git a/src/misc/extract-mentions.ts b/src/misc/extract-mentions.ts
index a53a25ffc..6ddd31004 100644
--- a/src/misc/extract-mentions.ts
+++ b/src/misc/extract-mentions.ts
@@ -1,6 +1,6 @@
 // test is located in test/extract-mentions
 
-import { MentionNode, MfmForest } from '../mfm/parser';
+import { MentionNode, MfmForest } from '../mfm/types';
 import { preorderF } from '../prelude/tree';
 
 export default function(mfmForest: MfmForest): MentionNode['props'][] {
diff --git a/test/mfm.ts b/test/mfm.ts
index 3452c5f10..36d8f540f 100644
--- a/test/mfm.ts
+++ b/test/mfm.ts
@@ -12,7 +12,8 @@ import * as assert from 'assert';
 
 import analyze from '../src/mfm/parse';
 import toHtml from '../src/mfm/html';
-import { createTree as tree, createLeaf as leaf, MfmTree, removeOrphanedBrackets } from '../src/mfm/parser';
+import { createTree as tree, createLeaf as leaf, MfmTree } from '../src/mfm/types';
+import { removeOrphanedBrackets } from '../src/mfm/parser';
 
 function text(text: string): MfmTree {
 	return leaf('text', { text });