diff --git a/.changeset/pink-nails-reply.md b/.changeset/pink-nails-reply.md
new file mode 100644
index 0000000..e1def2f
--- /dev/null
+++ b/.changeset/pink-nails-reply.md
@@ -0,0 +1,5 @@
+---
+"prettier-plugin-embed": patch
+---
+
+Add extensions to relative path import specifiers.
diff --git a/src/embedded/css/embedder.ts b/src/embedded/css/embedder.ts
index 70e585d..85e38a8 100644
--- a/src/embedded/css/embedder.ts
+++ b/src/embedded/css/embedder.ts
@@ -1,5 +1,5 @@
 import type { Options } from "prettier";
-import { builders } from "prettier/doc";
+import { builders } from "prettier/doc.js";
 import type { Embedder } from "../../types.js";
 import {
   preparePlaceholder,
diff --git a/src/embedded/es/embedder.ts b/src/embedded/es/embedder.ts
index ca9f9b1..70fba9c 100644
--- a/src/embedded/es/embedder.ts
+++ b/src/embedded/es/embedder.ts
@@ -1,5 +1,5 @@
 import type { Options } from "prettier";
-import { builders } from "prettier/doc";
+import { builders } from "prettier/doc.js";
 import type { Embedder } from "../../types.js";
 import {
   preparePlaceholder,
diff --git a/src/embedded/glsl/embedder.ts b/src/embedded/glsl/embedder.ts
index 26a4aa0..f892ee8 100644
--- a/src/embedded/glsl/embedder.ts
+++ b/src/embedded/glsl/embedder.ts
@@ -1,5 +1,5 @@
 import type { Options } from "prettier";
-import { builders } from "prettier/doc";
+import { builders } from "prettier/doc.js";
 import type { Embedder } from "../../types.js";
 import {
   preparePlaceholder,
diff --git a/src/embedded/graphql/embedder.ts b/src/embedded/graphql/embedder.ts
index 7819859..56430ef 100644
--- a/src/embedded/graphql/embedder.ts
+++ b/src/embedded/graphql/embedder.ts
@@ -1,5 +1,5 @@
 import type { Options } from "prettier";
-import { builders } from "prettier/doc";
+import { builders } from "prettier/doc.js";
 import type { Embedder } from "../../types.js";
 import {
   preparePlaceholder,
diff --git a/src/embedded/html/embedder.ts b/src/embedded/html/embedder.ts
index ff5e88e..6d0f16c 100644
--- a/src/embedded/html/embedder.ts
+++ b/src/embedded/html/embedder.ts
@@ -1,5 +1,5 @@
 import type { Options } from "prettier";
-import { builders, utils } from "prettier/doc";
+import { builders, utils } from "prettier/doc.js";
 import type { Embedder } from "../../types.js";
 import { preparePlaceholder, printTemplateExpressions } from "../utils.js";
 import { language } from "./language.js";
diff --git a/src/embedded/ini/embedder.ts b/src/embedded/ini/embedder.ts
index a75eb30..fd3b5b0 100644
--- a/src/embedded/ini/embedder.ts
+++ b/src/embedded/ini/embedder.ts
@@ -1,5 +1,5 @@
 import type { Options } from "prettier";
-import { builders } from "prettier/doc";
+import { builders } from "prettier/doc.js";
 import type { Embedder } from "../../types.js";
 import {
   preparePlaceholder,
diff --git a/src/embedded/java/embedder.ts b/src/embedded/java/embedder.ts
index c92e6f8..f69e485 100644
--- a/src/embedded/java/embedder.ts
+++ b/src/embedded/java/embedder.ts
@@ -1,5 +1,5 @@
 import type { Options } from "prettier";
-import { builders } from "prettier/doc";
+import { builders } from "prettier/doc.js";
 import type { Embedder } from "../../types.js";
 import {
   preparePlaceholder,
diff --git a/src/embedded/json/embedder.ts b/src/embedded/json/embedder.ts
index 27b5876..8421062 100644
--- a/src/embedded/json/embedder.ts
+++ b/src/embedded/json/embedder.ts
@@ -1,5 +1,5 @@
 import type { Options } from "prettier";
-import { builders } from "prettier/doc";
+import { builders } from "prettier/doc.js";
 import type { Embedder } from "../../types.js";
 import {
   printTemplateExpressions,
diff --git a/src/embedded/jsonata/embedder.ts b/src/embedded/jsonata/embedder.ts
index afce523..fc45a55 100644
--- a/src/embedded/jsonata/embedder.ts
+++ b/src/embedded/jsonata/embedder.ts
@@ -1,5 +1,5 @@
 import type { Options } from "prettier";
-import { builders } from "prettier/doc";
+import { builders } from "prettier/doc.js";
 import type { Embedder } from "../../types.js";
 import {
   preparePlaceholder,
diff --git a/src/embedded/latex/embedder.ts b/src/embedded/latex/embedder.ts
index 71d4d75..20fcf7c 100644
--- a/src/embedded/latex/embedder.ts
+++ b/src/embedded/latex/embedder.ts
@@ -1,5 +1,5 @@
 import type { Options } from "prettier";
-import { builders } from "prettier/doc";
+import { builders } from "prettier/doc.js";
 import type { Embedder } from "../../types.js";
 import {
   preparePlaceholder,
diff --git a/src/embedded/markdown/embedder.ts b/src/embedded/markdown/embedder.ts
index f984549..00152e2 100644
--- a/src/embedded/markdown/embedder.ts
+++ b/src/embedded/markdown/embedder.ts
@@ -1,6 +1,6 @@
 import dedent from "dedent";
 import type { Options } from "prettier";
-import { builders } from "prettier/doc";
+import { builders } from "prettier/doc.js";
 import type { Embedder } from "../../types.js";
 import {
   preparePlaceholder,
diff --git a/src/embedded/nginx/embedder.ts b/src/embedded/nginx/embedder.ts
index 757e134..87b17d3 100644
--- a/src/embedded/nginx/embedder.ts
+++ b/src/embedded/nginx/embedder.ts
@@ -1,5 +1,5 @@
 import type { Options } from "prettier";
-import { builders } from "prettier/doc";
+import { builders } from "prettier/doc.js";
 import type { Embedder } from "../../types.js";
 import {
   preparePlaceholder,
diff --git a/src/embedded/pegjs/embedder.ts b/src/embedded/pegjs/embedder.ts
index d54de0f..7073273 100644
--- a/src/embedded/pegjs/embedder.ts
+++ b/src/embedded/pegjs/embedder.ts
@@ -1,5 +1,5 @@
 import type { Options } from "prettier";
-import { builders } from "prettier/doc";
+import { builders } from "prettier/doc.js";
 import type { Embedder } from "../../types.js";
 import {
   preparePlaceholder,
diff --git a/src/embedded/php/embedder.ts b/src/embedded/php/embedder.ts
index 0182469..69acccd 100644
--- a/src/embedded/php/embedder.ts
+++ b/src/embedded/php/embedder.ts
@@ -1,5 +1,5 @@
 import type { Options } from "prettier";
-import { builders } from "prettier/doc";
+import { builders } from "prettier/doc.js";
 import type { Embedder } from "../../types.js";
 import {
   preparePlaceholder,
diff --git a/src/embedded/prisma/embedder.ts b/src/embedded/prisma/embedder.ts
index cb2b176..5a81403 100644
--- a/src/embedded/prisma/embedder.ts
+++ b/src/embedded/prisma/embedder.ts
@@ -1,5 +1,5 @@
 import type { Options } from "prettier";
-import { builders } from "prettier/doc";
+import { builders } from "prettier/doc.js";
 import type { Embedder } from "../../types.js";
 import {
   preparePlaceholder,
diff --git a/src/embedded/properties/embedder.ts b/src/embedded/properties/embedder.ts
index 3c76f3f..261295e 100644
--- a/src/embedded/properties/embedder.ts
+++ b/src/embedded/properties/embedder.ts
@@ -1,5 +1,5 @@
 import type { Options } from "prettier";
-import { builders } from "prettier/doc";
+import { builders } from "prettier/doc.js";
 import type { Embedder } from "../../types.js";
 import {
   preparePlaceholder,
diff --git a/src/embedded/pug/embedder.ts b/src/embedded/pug/embedder.ts
index aeb03f9..f2c7013 100644
--- a/src/embedded/pug/embedder.ts
+++ b/src/embedded/pug/embedder.ts
@@ -1,5 +1,5 @@
 import type { Options } from "prettier";
-import { builders } from "prettier/doc";
+import { builders } from "prettier/doc.js";
 import type { Embedder } from "../../types.js";
 import {
   preparePlaceholder,
diff --git a/src/embedded/ruby/embedder.ts b/src/embedded/ruby/embedder.ts
index 0c20d4f..abe6354 100644
--- a/src/embedded/ruby/embedder.ts
+++ b/src/embedded/ruby/embedder.ts
@@ -1,5 +1,5 @@
 import type { Options } from "prettier";
-import { builders } from "prettier/doc";
+import { builders } from "prettier/doc.js";
 import type { Embedder } from "../../types.js";
 import {
   preparePlaceholder,
diff --git a/src/embedded/sh/embedder.ts b/src/embedded/sh/embedder.ts
index 94cd341..7bf4984 100644
--- a/src/embedded/sh/embedder.ts
+++ b/src/embedded/sh/embedder.ts
@@ -1,5 +1,5 @@
 import type { Options } from "prettier";
-import { builders } from "prettier/doc";
+import { builders } from "prettier/doc.js";
 import type { Embedder } from "../../types.js";
 import {
   preparePlaceholder,
diff --git a/src/embedded/sql/embedder.ts b/src/embedded/sql/embedder.ts
index f7d884a..38c9adf 100644
--- a/src/embedded/sql/embedder.ts
+++ b/src/embedded/sql/embedder.ts
@@ -1,6 +1,6 @@
 import dedent from "dedent";
 import type { Options } from "prettier";
-import { builders } from "prettier/doc";
+import { builders } from "prettier/doc.js";
 import type { Embedder } from "../../types.js";
 import {
   preparePlaceholder,
diff --git a/src/embedded/toml/embedder.ts b/src/embedded/toml/embedder.ts
index 67c07e4..30ee5dc 100644
--- a/src/embedded/toml/embedder.ts
+++ b/src/embedded/toml/embedder.ts
@@ -1,5 +1,5 @@
 import type { Options } from "prettier";
-import { builders } from "prettier/doc";
+import { builders } from "prettier/doc.js";
 import type { Embedder } from "../../types.js";
 import {
   preparePlaceholder,
diff --git a/src/embedded/ts/embedder.ts b/src/embedded/ts/embedder.ts
index e47c6b6..49dedf9 100644
--- a/src/embedded/ts/embedder.ts
+++ b/src/embedded/ts/embedder.ts
@@ -1,5 +1,5 @@
 import type { Options } from "prettier";
-import { builders } from "prettier/doc";
+import { builders } from "prettier/doc.js";
 import type { Embedder } from "../../types.js";
 import {
   preparePlaceholder,
diff --git a/src/embedded/utils.ts b/src/embedded/utils.ts
index 7b0471a..bdd183a 100644
--- a/src/embedded/utils.ts
+++ b/src/embedded/utils.ts
@@ -1,6 +1,6 @@
 import type { Comment, Expression, TemplateLiteral } from "estree";
 import type { AstPath, Doc } from "prettier";
-import { builders, utils } from "prettier/doc";
+import { builders, utils } from "prettier/doc.js";
 import type {
   LiteralUnion,
   OmitIndexSignature,
diff --git a/src/embedded/xml/embedder.ts b/src/embedded/xml/embedder.ts
index 3437c33..fc407e2 100644
--- a/src/embedded/xml/embedder.ts
+++ b/src/embedded/xml/embedder.ts
@@ -1,5 +1,5 @@
 import type { Doc, Options } from "prettier";
-import { builders } from "prettier/doc";
+import { builders } from "prettier/doc.js";
 import type { Embedder } from "../../types.js";
 import {
   preparePlaceholder,
diff --git a/src/embedded/yaml/embedder.ts b/src/embedded/yaml/embedder.ts
index 90eb510..b9a5eef 100644
--- a/src/embedded/yaml/embedder.ts
+++ b/src/embedded/yaml/embedder.ts
@@ -1,5 +1,5 @@
 import type { Options } from "prettier";
-import { builders } from "prettier/doc";
+import { builders } from "prettier/doc.js";
 import type { Embedder } from "../../types.js";
 import {
   preparePlaceholder,
diff --git a/src/types.ts b/src/types.ts
index 3d6af8a..6d0d843 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -1,6 +1,6 @@
 import type { TemplateLiteral } from "estree";
 import type { AstPath, Doc, Options } from "prettier";
-import type { printer } from "prettier/doc";
+import type { printer } from "prettier/doc.js";
 import type {} from "sh-syntax";
 import type {} from "sql-formatter";
 import type {} from "sql-parser-cst";
diff --git a/src/utils.ts b/src/utils.ts
index 1ac01d2..600abce 100644
--- a/src/utils.ts
+++ b/src/utils.ts
@@ -6,7 +6,7 @@ import {
   type Printer,
   resolveConfigFile,
 } from "prettier";
-import { builders } from "prettier/doc";
+import { builders } from "prettier/doc.js";
 import JSONC from "tiny-jsonc";
 import {
   type EmbeddedComment,
diff --git a/tests/fixtures.spec.ts b/tests/fixtures.spec.ts
index a096461..f0bc962 100644
--- a/tests/fixtures.spec.ts
+++ b/tests/fixtures.spec.ts
@@ -3,7 +3,7 @@ import prettier from "prettier";
 import sql from "prettier-plugin-sql";
 import { glob } from "tinyglobby";
 import { describe, expect, it } from "vitest";
-import * as embed from "../src";
+import * as embed from "../src/index.js";
 
 describe("fixtures", () => {
   it("should work", async () => {