diff --git a/CHANGELOG.md b/CHANGELOG.md
index 02e63e4..0e7af15 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,10 @@ All notable changes to htmltools for Python will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [UNRELEASED]
+
+
+
 ## [0.5.3] 2024-07-18
 
 * HTML tags in docstrings are now escaped. (#90)
diff --git a/htmltools/__init__.py b/htmltools/__init__.py
index 3bc59e1..e9e243e 100644
--- a/htmltools/__init__.py
+++ b/htmltools/__init__.py
@@ -1,4 +1,4 @@
-__version__ = "0.5.3"
+__version__ = "0.5.3.9000"
 
 from . import svg, tags
 from ._core import TagAttrArg  # pyright: ignore[reportUnusedImport]  # noqa: F401
diff --git a/htmltools/_core.py b/htmltools/_core.py
index d2feb9d..2beee8d 100644
--- a/htmltools/_core.py
+++ b/htmltools/_core.py
@@ -460,7 +460,7 @@ def _normalize_attr_value(x: TagAttrValue) -> Optional[str]:
             return ""
         if isinstance(x, (int, float)):
             return str(x)
-        if isinstance(x, (HTML, str)):
+        if isinstance(x, (HTML, str)):  # type: ignore[reportUnnecessaryIsInstance]
             return x
         raise TypeError(
             f"Invalid type for attribute: {type(x)}."
@@ -1512,7 +1512,7 @@ def as_html_tags(
         Render the dependency as a ``TagList()``.
         """
         d = self.as_dict(lib_prefix=lib_prefix, include_version=include_version)
-        metas = [Tag("meta", **m) for m in self.meta]
+        metas = [Tag("meta", **m) for m in d["meta"]]
         links = [Tag("link", **s) for s in d["stylesheet"]]
         scripts = [Tag("script", **s) for s in d["script"]]
         return TagList(*metas, *links, *scripts, self.head)