diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index c15e7b5..93101dc 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ["3.8", "3.9", "3.10", "3.11"]
+        python-version: ["3.9", "3.10", "3.11", "3.12"]
 
     steps:
       - uses: actions/checkout@v4
diff --git a/clusttraj/io.py b/clusttraj/io.py
index e1063f6..fd1e066 100644
--- a/clusttraj/io.py
+++ b/clusttraj/io.py
@@ -15,7 +15,7 @@
 from dataclasses import dataclass
 from .utils import get_mol_info
 
-if importlib.util.find_spec("qml"):
+if importlib.util.find_spec("qmllib"):
     has_qml = True
 else:
     has_qml = False
@@ -377,7 +377,7 @@ def configure_runtime(args_in: List[str]) -> ClustOptions:
 
     if (args.reorder_alg == "qml") and (not has_qml):
         parser.error(
-            "You must have the development branch of qml installed in order to use it as a reorder method."
+            "You must have the optional dependency `qmllib` installed in order to use it as a reorder method."
         )
 
     if args.clusters_configurations:
diff --git a/pyproject.toml b/pyproject.toml
index c60c430..d61ba70 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -43,8 +43,8 @@ clusttraj = "clusttraj.main:main"
 [project.optional-dependencies]
 test = ["pytest", "pytest-cov[all]"]
 docs = ["sphinx", "sphinx_rtd_theme"]
-lint = ["ruff", "black"]
-qml = ["qml"] # you can install from git+https://github.com/hmcezar/qml@develop
+lint = ["black"]
+qml = ["qmllib"]
 all = ["clusttraj[test,docs,lint,qml]"]
 
 [tool.setuptools]
@@ -52,7 +52,3 @@ packages = ["clusttraj"]
 
 [tool.black]
 line-length = 89
-
-[tool.ruff]
-line-length = 89
-ignore = ["E501"]
diff --git a/test/test_plot.py b/test/test_plot.py
index 8e66f9d..3198b16 100644
--- a/test/test_plot.py
+++ b/test/test_plot.py
@@ -8,8 +8,8 @@ def test_plot_clust_evo(clust_opt, clusters_seq):
     assert os.path.exists(clust_opt.evo_name)
 
 
-def test_plot_dendrogram(clust_opt, Z_matrix):
-    assert plot_dendrogram(clust_opt, Z_matrix) is None
+def test_plot_dendrogram(clust_opt, clusters_seq, Z_matrix):
+    assert plot_dendrogram(clust_opt, clusters_seq, Z_matrix) is None
 
     assert os.path.exists(clust_opt.dendrogram_name)