diff --git a/pyproject.toml b/pyproject.toml
index b7b0280..1979ebb 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -40,7 +40,8 @@ classifiers = [
         "Programming Language :: Python :: 3.12",
         "Programming Language :: Python :: Implementation :: CPython",
         "Programming Language :: Python :: Implementation :: PyPy",
-        "Programming Language :: Python :: Implementation :: GraalPy",
+        # no graalpy classifier yet (pypa/trove-classifiers#188)
+        # "Programming Language :: Python :: Implementation :: GraalPy",
 ]
 
 [project.optional-dependencies]
@@ -54,6 +55,12 @@ where = ["src"]
 [tool.setuptools.package-data]
 "ua_parser" = ["py.typed"]
 
+[tool.ruff]
+exclude = [
+    "src/ua_parser/_lazy.py",
+    "src/ua_parser/_matchers.py",
+]
+
 [tool.ruff.lint]
 select = ["F", "E", "W", "I", "RET", "RUF", "PT"]
 ignore = [
diff --git a/src/ua_parser/__main__.py b/src/ua_parser/__main__.py
index c461a28..0ed140f 100644
--- a/src/ua_parser/__main__.py
+++ b/src/ua_parser/__main__.py
@@ -11,7 +11,7 @@
 import sys
 import threading
 import time
-import tracemalloc
+import types
 from typing import (
     Any,
     Callable,
@@ -38,8 +38,15 @@
 )
 from .caching import Cache, Local
 from .loaders import load_builtins, load_yaml
-from .re2 import Resolver as Re2Resolver
-from .regex import Resolver as RegexResolver
+
+try:
+    from .re2 import Resolver as Re2Resolver
+except ImportError:
+    pass
+try:
+    from .regex import Resolver as RegexResolver
+except ImportError:
+    pass
 from .user_agent_parser import Parse
 
 CACHEABLE = {
@@ -60,6 +67,17 @@
     ]
 )
 
+try:
+    import tracemalloc
+except ImportError:
+    snapshot = types.SimpleNamespace(
+        compare_to=lambda _1, _2: [],
+    )
+    tracemalloc = types.SimpleNamespace(  # type: ignore
+        start=lambda: None,
+        take_snapshot=lambda: snapshot,
+    )
+
 
 def get_rules(parsers: List[str], regexes: Optional[io.IOBase]) -> Matchers:
     if regexes:
diff --git a/tox.ini b/tox.ini
index 778055e..d8c7cf0 100644
--- a/tox.ini
+++ b/tox.ini
@@ -2,13 +2,13 @@
 min_version = 4.0
 env_list = py3{9,10,11,12}
            pypy3.10
-           #graalpy-24
+           graalpy-24
            flake8, black, typecheck
 labels =
-    test = py3{9,10,11,12},pypy3.10#,graalpy-24
+    test = py3{9,10,11,12},pypy3.10,graalpy-24
     cpy = py3{9,10,11,12}
     pypy = pypy3.10
-    #graal = graalpy-24
+    graal = graalpy-24
     check = flake8, black, typecheck
 
 [testenv]