diff --git a/src/neo4j_graphrag/embeddings/cohere.py b/src/neo4j_graphrag/embeddings/cohere.py
index 23da9613..63906a5e 100644
--- a/src/neo4j_graphrag/embeddings/cohere.py
+++ b/src/neo4j_graphrag/embeddings/cohere.py
@@ -28,8 +28,8 @@ class CohereEmbeddings(Embedder):
     def __init__(self, model: str = "", **kwargs: Any) -> None:
         if cohere is None:
             raise ImportError(
-                "Could not import cohere python client. "
-                'Please install it with `pip install "neo4j-graphrag[cohere]"`.'
+                """Could not import cohere python client.
+                Please install it with `pip install "neo4j-graphrag[cohere]"`."""
             )
         self.model = model
         self.client = cohere.Client(**kwargs)
diff --git a/src/neo4j_graphrag/embeddings/mistral.py b/src/neo4j_graphrag/embeddings/mistral.py
index 05bd4f84..8c352263 100644
--- a/src/neo4j_graphrag/embeddings/mistral.py
+++ b/src/neo4j_graphrag/embeddings/mistral.py
@@ -39,8 +39,8 @@ class MistralAIEmbeddings(Embedder):
     def __init__(self, model: str = "mistral-embed", **kwargs: Any) -> None:
         if Mistral is None:
             raise ImportError(
-                "Could not import mistralai. "
-                'Please install it with `pip install "neo4j-graphrag[mistralai]"`.'
+                """Could not import mistralai.
+                Please install it with `pip install "neo4j-graphrag[mistralai]"`."""
             )
         api_key = kwargs.pop("api_key", None)
         if api_key is None:
diff --git a/src/neo4j_graphrag/embeddings/openai.py b/src/neo4j_graphrag/embeddings/openai.py
index 55544153..4a4d6038 100644
--- a/src/neo4j_graphrag/embeddings/openai.py
+++ b/src/neo4j_graphrag/embeddings/openai.py
@@ -36,8 +36,8 @@ def __init__(self, model: str = "text-embedding-ada-002", **kwargs: Any) -> None
             import openai
         except ImportError:
             raise ImportError(
-                "Could not import openai python client. "
-                'Please install it with `pip install "neo4j-graphrag[openai]"`.'
+                """Could not import openai python client.
+                Please install it with `pip install "neo4j-graphrag[openai]"`."""
             )
         self.openai = openai
         self.model = model
diff --git a/src/neo4j_graphrag/embeddings/sentence_transformers.py b/src/neo4j_graphrag/embeddings/sentence_transformers.py
index 503aa6b8..f30ed5b7 100644
--- a/src/neo4j_graphrag/embeddings/sentence_transformers.py
+++ b/src/neo4j_graphrag/embeddings/sentence_transformers.py
@@ -28,8 +28,8 @@ def __init__(
             import torch
         except ImportError:
             raise ImportError(
-                "Could not import sentence_transformers python package. "
-                'Please install it with `pip install "neo4j-graphrag[sentence-transformers]"`.'
+                """Could not import sentence_transformers python package.
+                Please install it with `pip install "neo4j-graphrag[sentence-transformers]"`."""
             )
         self.torch = torch
         self.np = np
diff --git a/src/neo4j_graphrag/embeddings/vertexai.py b/src/neo4j_graphrag/embeddings/vertexai.py
index f226ff06..5aecdcfa 100644
--- a/src/neo4j_graphrag/embeddings/vertexai.py
+++ b/src/neo4j_graphrag/embeddings/vertexai.py
@@ -36,8 +36,8 @@ class VertexAIEmbeddings(Embedder):
     def __init__(self, model: str = "text-embedding-004") -> None:
         if vertexai is None:
             raise ImportError(
-                "Could not import Vertex AI Python client. "
-                'Please install it with `pip install "neo4j-graphrag[google]"`.'
+                """Could not import Vertex AI Python client.
+                Please install it with `pip install "neo4j-graphrag[google]"`."""
             )
         self.vertexai_model = (
             vertexai.language_models.TextEmbeddingModel.from_pretrained(model)
diff --git a/src/neo4j_graphrag/llm/anthropic_llm.py b/src/neo4j_graphrag/llm/anthropic_llm.py
index 3c800e24..e8f551cb 100644
--- a/src/neo4j_graphrag/llm/anthropic_llm.py
+++ b/src/neo4j_graphrag/llm/anthropic_llm.py
@@ -55,8 +55,8 @@ def __init__(
             import anthropic
         except ImportError:
             raise ImportError(
-                "Could not import Anthropic Python client. "
-                'Please install it with `pip install "neo4j-graphrag[anthropic]"`.'
+                """Could not import Anthropic Python client.
+                Please install it with `pip install "neo4j-graphrag[anthropic]"`."""
             )
         super().__init__(model_name, model_params)
         self.anthropic = anthropic
diff --git a/src/neo4j_graphrag/llm/cohere_llm.py b/src/neo4j_graphrag/llm/cohere_llm.py
index 9ee80dc3..aeddafd3 100644
--- a/src/neo4j_graphrag/llm/cohere_llm.py
+++ b/src/neo4j_graphrag/llm/cohere_llm.py
@@ -53,8 +53,8 @@ def __init__(
             import cohere
         except ImportError:
             raise ImportError(
-                "Could not import cohere python client. "
-                'Please install it with `pip install "neo4j-graphrag[cohere]"`.'
+                """Could not import cohere python client.
+                Please install it with `pip install "neo4j-graphrag[cohere]"`."""
             )
 
         self.cohere = cohere
diff --git a/src/neo4j_graphrag/llm/mistralai_llm.py b/src/neo4j_graphrag/llm/mistralai_llm.py
index ac2793d0..b9254ffe 100644
--- a/src/neo4j_graphrag/llm/mistralai_llm.py
+++ b/src/neo4j_graphrag/llm/mistralai_llm.py
@@ -53,8 +53,8 @@ def __init__(
         """
         if Mistral is None:
             raise ImportError(
-                "Could not import Mistral Python client. "
-                'Please install it with `pip install "neo4j-graphrag[mistralai]"`.'
+                """Could not import Mistral Python client.
+                Please install it with `pip install "neo4j-graphrag[mistralai]"`."""
             )
         super().__init__(model_name, model_params)
         api_key = kwargs.pop("api_key", None)
diff --git a/src/neo4j_graphrag/llm/openai_llm.py b/src/neo4j_graphrag/llm/openai_llm.py
index f211a4f2..9de5071f 100644
--- a/src/neo4j_graphrag/llm/openai_llm.py
+++ b/src/neo4j_graphrag/llm/openai_llm.py
@@ -50,8 +50,8 @@ def __init__(
             import openai
         except ImportError:
             raise ImportError(
-                "Could not import openai Python client. "
-                'Please install it with `pip install "neo4j-graphrag[openai]"`.'
+                """Could not import openai Python client.
+                Please install it with `pip install "neo4j-graphrag[openai]"`."""
             )
         self.openai = openai
         super().__init__(model_name, model_params)
diff --git a/src/neo4j_graphrag/llm/vertexai_llm.py b/src/neo4j_graphrag/llm/vertexai_llm.py
index ffebfd41..dff5e1cf 100644
--- a/src/neo4j_graphrag/llm/vertexai_llm.py
+++ b/src/neo4j_graphrag/llm/vertexai_llm.py
@@ -59,8 +59,8 @@ def __init__(
     ):
         if GenerativeModel is None or ResponseValidationError is None:
             raise ImportError(
-                "Could not import Vertex AI Python client. "
-                'Please install it with `pip install "neo4j-graphrag[google]"`.'
+                """Could not import Vertex AI Python client.
+                Please install it with `pip install "neo4j-graphrag[google]"`."""
             )
         super().__init__(model_name, model_params)
         self.model = GenerativeModel(model_name=model_name, **kwargs)