diff --git a/.github/workflows/pytest.yml b/.github/workflows/pytest.yml
index 6340ced..1d27221 100644
--- a/.github/workflows/pytest.yml
+++ b/.github/workflows/pytest.yml
@@ -18,7 +18,7 @@ jobs:
 #           file: coverage.xml
   pytest:
       strategy:
-        fail-fast: true
+        fail-fast: false
         matrix:
           os:
             - ubuntu-latest
diff --git a/poetry.lock b/poetry.lock
index 8a2ce3e..27f81bf 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -2064,11 +2064,13 @@ dataclasses-json = ">=0.5.7,<0.7"
 jsonpatch = ">=1.33,<2.0"
 langsmith = ">=0.0.43,<0.1.0"
 numpy = ">=1,<2"
+openai = {version = ">=0,<1", optional = true, markers = "extra == \"llms\" or extra == \"openai\" or extra == \"azure\" or extra == \"all\" or extra == \"extended-testing\""}
 pydantic = ">=1,<3"
 PyYAML = ">=5.3"
 requests = ">=2,<3"
 SQLAlchemy = ">=1.4,<3"
 tenacity = ">=8.1.0,<9.0.0"
+tiktoken = {version = ">=0.3.2,<0.6.0", optional = true, markers = "python_version >= \"3.9\" and (extra == \"openai\" or extra == \"all\")"}
 
 [package.extras]
 all = ["O365 (>=2.0.26,<3.0.0)", "aleph-alpha-client (>=2.15.0,<3.0.0)", "amadeus (>=8.1.0)", "arxiv (>=1.4,<2.0)", "atlassian-python-api (>=3.36.0,<4.0.0)", "awadb (>=0.3.9,<0.4.0)", "azure-ai-formrecognizer (>=3.2.1,<4.0.0)", "azure-ai-vision (>=0.11.1b1,<0.12.0)", "azure-cognitiveservices-speech (>=1.28.0,<2.0.0)", "azure-cosmos (>=4.4.0b1,<5.0.0)", "azure-identity (>=1.12.0,<2.0.0)", "beautifulsoup4 (>=4,<5)", "clarifai (>=9.1.0)", "clickhouse-connect (>=0.5.14,<0.6.0)", "cohere (>=4,<5)", "deeplake (>=3.6.8,<4.0.0)", "docarray[hnswlib] (>=0.32.0,<0.33.0)", "duckduckgo-search (>=3.8.3,<4.0.0)", "elasticsearch (>=8,<9)", "esprima (>=4.0.1,<5.0.0)", "faiss-cpu (>=1,<2)", "google-api-python-client (==2.70.0)", "google-auth (>=2.18.1,<3.0.0)", "google-search-results (>=2,<3)", "gptcache (>=0.1.7)", "html2text (>=2020.1.16,<2021.0.0)", "huggingface_hub (>=0,<1)", "jinja2 (>=3,<4)", "jq (>=1.4.1,<2.0.0)", "lancedb (>=0.1,<0.2)", "langkit (>=0.0.6,<0.1.0)", "lark (>=1.1.5,<2.0.0)", "libdeeplake (>=0.0.60,<0.0.61)", "librosa (>=0.10.0.post2,<0.11.0)", "lxml (>=4.9.2,<5.0.0)", "manifest-ml (>=0.0.1,<0.0.2)", "marqo (>=1.2.4,<2.0.0)", "momento (>=1.10.1,<2.0.0)", "nebula3-python (>=3.4.0,<4.0.0)", "neo4j (>=5.8.1,<6.0.0)", "networkx (>=2.6.3,<4)", "nlpcloud (>=1,<2)", "nltk (>=3,<4)", "nomic (>=1.0.43,<2.0.0)", "openai (>=0,<1)", "openlm (>=0.0.5,<0.0.6)", "opensearch-py (>=2.0.0,<3.0.0)", "pdfminer-six (>=20221105,<20221106)", "pexpect (>=4.8.0,<5.0.0)", "pgvector (>=0.1.6,<0.2.0)", "pinecone-client (>=2,<3)", "pinecone-text (>=0.4.2,<0.5.0)", "psycopg2-binary (>=2.9.5,<3.0.0)", "pymongo (>=4.3.3,<5.0.0)", "pyowm (>=3.3.0,<4.0.0)", "pypdf (>=3.4.0,<4.0.0)", "pytesseract (>=0.3.10,<0.4.0)", "python-arango (>=7.5.9,<8.0.0)", "pyvespa (>=0.33.0,<0.34.0)", "qdrant-client (>=1.3.1,<2.0.0)", "rdflib (>=6.3.2,<7.0.0)", "redis (>=4,<5)", "requests-toolbelt (>=1.0.0,<2.0.0)", "sentence-transformers (>=2,<3)", "singlestoredb (>=0.7.1,<0.8.0)", "tensorflow-text (>=2.11.0,<3.0.0)", "tigrisdb (>=1.0.0b6,<2.0.0)", "tiktoken (>=0.3.2,<0.6.0)", "torch (>=1,<3)", "transformers (>=4,<5)", "weaviate-client (>=3,<4)", "wikipedia (>=1,<2)", "wolframalpha (==5.0.0)"]
@@ -2823,8 +2825,8 @@ files = [
 [package.dependencies]
 numpy = [
     {version = ">=1.20.3", markers = "python_version < \"3.10\""},
-    {version = ">=1.23.2", markers = "python_version >= \"3.11\""},
     {version = ">=1.21.0", markers = "python_version >= \"3.10\" and python_version < \"3.11\""},
+    {version = ">=1.23.2", markers = "python_version >= \"3.11\""},
 ]
 python-dateutil = ">=2.8.2"
 pytz = ">=2020.1"
@@ -5231,4 +5233,4 @@ testing = ["big-O", "jaraco.functools", "jaraco.itertools", "more-itertools", "p
 [metadata]
 lock-version = "2.0"
 python-versions = ">=3.8.1,<3.12"
-content-hash = "0b0a48b1e6ee391aa2185c7044e2913044421f057b8da27609ab4ef93dae981d"
+content-hash = "f4338ebea3413fa02ef318211beb924969d7e120fd85e903bec77ce2a774545a"
diff --git a/pyproject.toml b/pyproject.toml
index 82cf6f8..18320f8 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -19,7 +19,7 @@ python = ">=3.8.1,<3.12"
 openai = {extras = ["embeddings"], version = "^0.28.1"}
 pathlib = "^1.0.1"
 click = "^8.1.7"
-langchain = "^0.0.312"
+langchain = {optional = false, version = "^0.0.312", extras = ["openai"]}
 nbformat = "^5.9.2"
 chromadb = "^0.4.14"
 pysqlite3-binary = "^0.5.2"
@@ -27,7 +27,6 @@ arize-phoenix = {extras = ["experimental"], version = "^0.0.49"}
 python-dotenv = "^1.0.0"
 pyyaml = "^6.0.1"
 rich = "^13.6.0"
-tiktoken = "^0.5.1"
 
 [tool.poetry.dev-dependencies]
 pytest = "^7.1.0"