diff --git a/packages/misskey-bubble-game/package.json b/packages/misskey-bubble-game/package.json
index 934717571f..acf5254801 100644
--- a/packages/misskey-bubble-game/package.json
+++ b/packages/misskey-bubble-game/package.json
@@ -6,10 +6,12 @@
 	"types": "./built/index.d.ts",
 	"exports": {
 		".": {
+			"default": "./built/index.js",
 			"import": "./built/index.js",
 			"types": "./built/index.d.ts"
 		},
 		"./*": {
+			"default": "./built/*",
 			"import": "./built/*",
 			"types": "./built/*"
 		}
diff --git a/packages/misskey-js/package.json b/packages/misskey-js/package.json
index acb9e0ea6e..5ac7e0b24a 100644
--- a/packages/misskey-js/package.json
+++ b/packages/misskey-js/package.json
@@ -8,10 +8,12 @@
 	"types": "./built/index.d.ts",
 	"exports": {
 		".": {
+			"default": "./built/index.js",
 			"import": "./built/index.js",
 			"types": "./built/index.d.ts"
 		},
 		"./*": {
+			"default": "./built/*",
 			"import": "./built/*",
 			"types": "./built/*"
 		}
diff --git a/packages/misskey-reversi/package.json b/packages/misskey-reversi/package.json
index 6e4a770bb1..36827663b1 100644
--- a/packages/misskey-reversi/package.json
+++ b/packages/misskey-reversi/package.json
@@ -6,10 +6,12 @@
 	"types": "./built/index.d.ts",
 	"exports": {
 		".": {
+			"default": "./built/index.js",
 			"import": "./built/index.js",
 			"types": "./built/index.d.ts"
 		},
 		"./*": {
+			"default": "./built/*",
 			"import": "./built/*",
 			"types": "./built/*"
 		}