diff --git a/pyproject.toml b/pyproject.toml
index 0b648b0..ef06609 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -45,6 +45,7 @@ classifiers = [
     'Programming Language :: Python :: 3.8',
     'Programming Language :: Python :: 3.9',
     'Programming Language :: Python :: 3.10',
+    'Programming Language :: Python :: 3.11',
     'Typing :: Typed'
 ]
 keywords = [
@@ -57,7 +58,7 @@ keywords = [
 [tool.poetry.dependencies]
 python = "^3.6.2"
 importlib-metadata = { version = ">= 3.4", python = "< 3.8" }
-packageurl-python = "^0.9.0"
+packageurl-python = ">=0.9.0, <2"
 PyYAML = ">=5.4.1, <7.0.0"
 requests = "^2.20.0"
 tinydb = "^4.5.0"
diff --git a/tox.ini b/tox.ini
index 10d5825..acd3ab3 100644
--- a/tox.ini
+++ b/tox.ini
@@ -19,7 +19,7 @@ minversion = 3.10
 envlist =
     flake8
     mypy-{locked,lowest}
-    py{310,39,38,37,36}-{locked,lowest}
+    py{311,310,39,38,37,36}-{locked,lowest}
 isolated_build = True
 skip_missing_interpreters = True
 usedevelop = False