diff --git a/poetry.lock b/poetry.lock
index 50ec571..150dc02 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -260,7 +260,7 @@ python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 version = "2.9"
 
 [[package]]
-category = "dev"
+category = "main"
 description = "Read metadata from Python packages"
 marker = "python_version < \"3.8\""
 name = "importlib-metadata"
@@ -608,7 +608,7 @@ python-versions = "*"
 version = "0.1.9"
 
 [[package]]
-category = "dev"
+category = "main"
 description = "Backport of pathlib-compatible object wrapper for zip files"
 marker = "python_version < \"3.8\""
 name = "zipp"
@@ -621,7 +621,7 @@ docs = ["sphinx", "jaraco.packaging (>=3.2)", "rst.linker (>=1.9)"]
 testing = ["jaraco.itertools", "func-timeout"]
 
 [metadata]
-content-hash = "b53e73cac913a33d502986160a9ed24dd8d9c1ed63218db43e7446fe2f446120"
+content-hash = "2810dc20ff30f0e91c106d28e28c377a9516c3a50b6917e848a70510294a2129"
 python-versions = "^3.7"
 
 [metadata.files]
diff --git a/pyproject.toml b/pyproject.toml
index bd27e8a..3696d7c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -12,6 +12,7 @@ homepage = "https://github.com/staticdev/toml-validator"
 python = "^3.7"
 tomlkit = "^0.5.9"
 click = "^7.0"
+importlib_metadata = {version = "^1.6.0", python = "<3.8"}
 
 [tool.poetry.dev-dependencies]
 pytest = "^5.3.5"
diff --git a/src/toml_validator/__init__.py b/src/toml_validator/__init__.py
index 3dc1f76..1db6e80 100644
--- a/src/toml_validator/__init__.py
+++ b/src/toml_validator/__init__.py
@@ -1 +1,11 @@
-__version__ = "0.1.0"
+"""The TOML validator."""
+try:
+    from importlib.metadata import version, PackageNotFoundError  # type: ignore
+except ImportError:  # pragma: no cover
+    from importlib_metadata import version, PackageNotFoundError  # type: ignore
+
+
+try:
+    __version__ = version(__name__)
+except PackageNotFoundError:  # pragma: no cover
+    __version__ = "unknown"