diff --git a/README.md b/README.md
index 5a4799e..9fbf06a 100644
--- a/README.md
+++ b/README.md
@@ -24,23 +24,20 @@ from pwhtmltopdf import HtmlToPdf
 
 
 async def this_from_url():
-    htp = HtmlToPdf()
-    await htp.from_url("https://playwright.dev/", "from_url.pdf")
-    await htp.close()
+    async with HtmlToPdf() as htp:
+        await htp.from_url("https://playwright.dev/", "from_url.pdf")
 
 
 async def this_from_file():
-    htp = HtmlToPdf()
-    # Make sure the current directory has a test.html file
-    await htp.from_file("test.html", "from_file.pdf")
-    await htp.close()
+    async with HtmlToPdf() as htp:
+        # Make sure the current directory has a test.html file
+        await htp.from_file("test.html", "from_file.pdf")
 
 
 async def this_from_string():
-    htp = HtmlToPdf()
-    content = pathlib.Path("test.html").read_text()
-    await htp.from_string(content, "from_string.pdf")
-    await htp.close()
+    async with HtmlToPdf() as htp:
+        content = pathlib.Path("test.html").read_text()
+        await htp.from_string(content, "from_string.pdf")
 
 
 if __name__ == '__main__':
@@ -61,7 +58,8 @@ from pwhtmltopdf import HtmlToPdf
 
 async def this_render_from_url():
     file_path = pathlib.Path("tests/images.html").absolute()
-    async with HtmlToPdf(static_root="tests/static", wait_until="load", print_background=True) as htp:
+    async with HtmlToPdf(static_root="tests/static",
+                         wait_until="load", print_background=True) as htp:
         await htp.from_url(
             f"file://{file_path}",
             "tests/effect/from_url/local_url_render.pdf",
@@ -73,7 +71,8 @@ async def this_render_from_url():
 async def this_render_from_file():
     htp = HtmlToPdf(static_root="tests/static")
     await htp.from_file(
-        "tests/images.html", "tests/effect/from_file/images_render.pdf", local_render=True, char_code=123
+        "tests/images.html", "tests/effect/from_file/images_render.pdf",
+        local_render=True, char_code=123
     )
     await htp.close()
 
@@ -81,7 +80,8 @@ async def this_render_from_file():
 async def this_render_from_string():
     content = pathlib.Path("tests/images.html").read_text()
     htp = HtmlToPdf(static_root="tests/static")
-    await htp.from_string(content, "tests/effect/from_string/images_render.pdf", local_render=True, char_code=123)
+    await htp.from_string(content, "tests/effect/from_string/images_render.pdf",
+                          local_render=True, char_code=123)
     await htp.close()