diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
new file mode 100644
index 0000000..930df99
--- /dev/null
+++ b/.pre-commit-config.yaml
@@ -0,0 +1,21 @@
+# See https://pre-commit.com for more information
+# See https://pre-commit.com/hooks.html for more hooks
+repos:
+  - repo: 'https://github.com/pre-commit/pre-commit-hooks'
+    rev: v3.2.0
+    hooks:
+      - id: trailing-whitespace
+      - id: end-of-file-fixer
+      - id: check-yaml
+      - id: check-added-large-files
+  - repo: 'https://github.com/astral-sh/ruff-pre-commit'
+    rev: v0.6.6
+    hooks:
+      - id: ruff
+        args:
+          - '--fix'
+      - id: ruff-format
+  - repo: 'https://github.com/pre-commit/mirrors-mypy'
+    rev: v1.11.2
+    hooks:
+      - id: mypy
diff --git a/knowledge_verificator/nli.py b/knowledge_verificator/nli.py
index 28c541f..95abcb1 100644
--- a/knowledge_verificator/nli.py
+++ b/knowledge_verificator/nli.py
@@ -3,15 +3,16 @@
 from enum import Enum
 import warnings
 import logging
-from transformers import AutoTokenizer, AutoModelForSequenceClassification # type: ignore
+from transformers import AutoTokenizer, AutoModelForSequenceClassification  # type: ignore[import-untyped]
 import torch
 
 
 class Relation(Enum):
     """Possible relations between premise and hypothesis."""
-    ENTAILMENT = 'entailment'
-    NEUTRAL = 'neutral'
-    CONTRADICTION = 'contradiction'
+
+    ENTAILMENT = "entailment"
+    NEUTRAL = "neutral"
+    CONTRADICTION = "contradiction"
 
 
 def infer(
@@ -48,7 +49,9 @@ def infer(
     # hg_model_hub_name = "ynie/xlnet-large-cased-snli_mnli_fever_anli_R1_R2_R3-nli"
 
     logging.getLogger("transformers").setLevel(logging.ERROR)
-    warnings.filterwarnings('ignore', message="`clean_up_tokenization_spaces` was not set.")
+    warnings.filterwarnings(
+        "ignore", message="`clean_up_tokenization_spaces` was not set."
+    )
 
     tokenizer = AutoTokenizer.from_pretrained(hg_model_hub_name)
     model = AutoModelForSequenceClassification.from_pretrained(hg_model_hub_name)
@@ -61,29 +64,36 @@ def infer(
         truncation=True,
     )
 
-    input_ids = torch.Tensor(tokenized_input_seq_pair['input_ids']).long().unsqueeze(0)
+    input_ids = torch.Tensor(tokenized_input_seq_pair["input_ids"]).long().unsqueeze(0)
     # remember bart doesn't have 'token_type_ids', remove the line below if you are using bart.
-    token_type_ids = torch.Tensor(tokenized_input_seq_pair['token_type_ids']).long().unsqueeze(0)
-    attention_mask = torch.Tensor(tokenized_input_seq_pair['attention_mask']).long().unsqueeze(0)
+    token_type_ids = (
+        torch.Tensor(tokenized_input_seq_pair["token_type_ids"]).long().unsqueeze(0)
+    )
+    attention_mask = (
+        torch.Tensor(tokenized_input_seq_pair["attention_mask"]).long().unsqueeze(0)
+    )
 
     outputs = model(
         input_ids,
         attention_mask=attention_mask,
         token_type_ids=token_type_ids,
-        labels=None
+        labels=None,
     )
 
-    predicted_probability = torch.softmax(outputs[0], dim=1)[0].tolist()  # batch_size only one
+    predicted_probability = torch.softmax(outputs[0], dim=1)[
+        0
+    ].tolist()  # batch_size only one
 
     entailment = round(predicted_probability[0], precision)
     neutral = round(predicted_probability[1], precision)
 
     return {
-        Relation.ENTAILMENT : entailment,
-        Relation.NEUTRAL : neutral,
-        Relation.CONTRADICTION : round(1. - entailment - neutral, precision)
+        Relation.ENTAILMENT: entailment,
+        Relation.NEUTRAL: neutral,
+        Relation.CONTRADICTION: round(1.0 - entailment - neutral, precision),
     }
 
+
 def infer_relation(
     premise: str,
     hypothesis: str,
@@ -91,9 +101,9 @@ def infer_relation(
     """Infer the most probable type of relationship between `premise` and `hypothesis`."""
     inference = infer(premise=premise, hypothesis=hypothesis, precision=10)
 
-    max_probability = 0.
+    max_probability = 0.0
     most_probable = Relation.CONTRADICTION
-    for (relation, probability) in inference.items():
+    for relation, probability in inference.items():
         if probability > max_probability:
             max_probability = probability
             most_probable = relation
diff --git a/tests/test_qg.py b/tests/test_qg.py
index aef44f4..fe5c55b 100644
--- a/tests/test_qg.py
+++ b/tests/test_qg.py
@@ -2,9 +2,10 @@
 
 import pytest
 
-from transformers import set_seed
+from transformers import set_seed  # type: ignore[import-untyped]
 from knowledge_verificator.qg import QuestionGeneration
 
+
 @pytest.fixture
 def qg():
     """Provide non-deterministically initialized instance of the `QuestionGeneration` class."""
@@ -13,19 +14,17 @@ def qg():
     return question_generation
 
 
-@pytest.mark.parametrize('question,answer,context', (
-    ('Where is the red apple located?', 'Tree', 'The red apple is on a tree.'),
-))
+@pytest.mark.parametrize(
+    "question,answer,context",
+    (("Where is the red apple located?", "Tree", "The red apple is on a tree."),),
+)
 def test_basic_question_generation(question: str, answer: str, context: str, qg):
     """Test if generating in very simple case works as expected."""
-    output = qg.generate(
-        answer=answer,
-        context=context
-    )
+    output = qg.generate(answer=answer, context=context)
     expected = {
-        'question': question,
-        'answer': answer,
-        'context': context,
+        "question": question,
+        "answer": answer,
+        "context": context,
     }
 
     assert output == expected