diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 6084b66f..7f006036 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -34,6 +34,7 @@ jobs:
         - "3.8"
         - "3.9"
         - "3.10"
+        - "3.11-dev"
     name: Check Python ${{ matrix.python-version }}
     steps:
     - uses: actions/checkout@v3
diff --git a/pyproject.toml b/pyproject.toml
index d0073ddd..4ef2f970 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -21,6 +21,7 @@ classifiers = [
     "Programming Language :: Python :: 3.8",
     "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
+    "Programming Language :: Python :: 3.11",
     "Topic :: Scientific/Engineering",
     "Topic :: Scientific/Engineering :: Information Analysis",
     "Topic :: Scientific/Engineering :: Mathematics",
@@ -58,8 +59,8 @@ mpl = [
 plot = [
     "matplotlib >=3.0",
     "mplhep >=0.2.16",
-    "scipy >=1.4",
-    "iminuit >=2",
+    "scipy >=1.4; python_version<'3.11'",
+    "iminuit >=2; python_version<'3.11'",
 ]
 test = [
     "pytest >=6",
@@ -70,8 +71,8 @@ dev = [
     "pytest-mpl >=0.12",
     "matplotlib >=3.0",
     "mplhep >=0.2.16",
-    "scipy >=1.4",
-    "iminuit >=2",
+    "scipy >=1.4; python_version<'3.11'",
+    "iminuit >=2; python_version<'3.11'",
     "ipykernel",
 ]
 docs = [
@@ -79,8 +80,8 @@ docs = [
     "pytest-mpl >=0.12",
     "matplotlib >=3.0",
     "mplhep >=0.2.16",
-    "scipy >=1.4",
-    "iminuit >=2",
+    "scipy >=1.4; python_version<'3.11'",
+    "iminuit >=2; python_version<'3.11'",
     "ipython_genutils",
     "nbsphinx",
     "Sphinx >=3.0.0",
@@ -106,6 +107,10 @@ xfail_strict = true
 testpaths = ["tests"]
 required_plugins = ["pytest-mpl"]
 log_cli_level = "DEBUG"
+filterwarnings = [
+    "error",
+    "ignore::matplotlib._api.deprecation.MatplotlibDeprecationWarning"
+]
 
 [tool.nbqa.mutate]
 pyupgrade = 1