diff --git a/package.json b/package.json
index c91974f4..2c625911 100644
--- a/package.json
+++ b/package.json
@@ -4,14 +4,14 @@
 	"description": "Sapphire's piece loader.",
 	"main": "dist/cjs/index.cjs",
 	"module": "dist/esm/index.mjs",
-	"types": "dist/cjs/index.d.ts",
+	"types": "dist/cjs/index.d.cts",
 	"exports": {
 		"import": {
 			"types": "./dist/esm/index.d.mts",
 			"default": "./dist/esm/index.mjs"
 		},
 		"require": {
-			"types": "./dist/cjs/index.d.ts",
+			"types": "./dist/cjs/index.d.cts",
 			"default": "./dist/cjs/index.cjs"
 		}
 	},
@@ -26,7 +26,7 @@
 		"test": "vitest run",
 		"build": "tsup && concurrently \"yarn:postbuild:*\"",
 		"postbuild:internal": "node scripts/make-import.mjs",
-		"postbuild:types:cjs": "rollup-type-bundler -d dist/cjs",
+		"postbuild:types:cjs": "rollup-type-bundler -d dist/cjs -ot .cts",
 		"postbuild:types:esm": "rollup-type-bundler -d dist/esm -t .mts",
 		"typecheck": "tsc -b src",
 		"bump": "cliff-jumper",