diff --git a/Makefile b/Makefile
index f48a785a9..5b0c9649b 100644
--- a/Makefile
+++ b/Makefile
@@ -47,7 +47,8 @@ env-tests-optional: env env-tests
 		llama-index-embeddings-huggingface \
 		llama-index-embeddings-openai \
 		unstructured \
-		chromadb
+		chromadb \
+		langchain-openai
 
 env-tests-db: env-tests
 	poetry run pip install \
diff --git a/src/apps/langchain/pyproject.toml b/src/apps/langchain/pyproject.toml
index 5bec7f2f2..0176c813f 100644
--- a/src/apps/langchain/pyproject.toml
+++ b/src/apps/langchain/pyproject.toml
@@ -29,9 +29,18 @@ classifiers = [
 [tool.poetry.dependencies]
 python = "^3.8.1"
 trulens-core = { version = "^1.0.0" }
-langchain = ">=0.2.10"
-langchain-core = ">=0.2.0"
-pydantic = "^2.4.2"
+langchain = [
+  { version = ">=0.2.10,<0.3.0", python = "<3.9" },
+  { version = ">=0.3.0", python = ">=3.9" },
+]
+langchain-core = [
+  { version = ">=0.2.0,<0.3.0", python = "<3.9" },
+  { version = ">=0.3.0", python = ">=3.9" },
+]
+pydantic = [
+  { version = "^1.0.0", python = "<3.9" },
+  { version = ">=2.4.2", python = ">=3.9" },
+]
 
 [tool.poetry.group.dev.dependencies]
 trulens-core = { path = "../../core" }
diff --git a/src/apps/llamaindex/pyproject.toml b/src/apps/llamaindex/pyproject.toml
index 752500445..724369277 100644
--- a/src/apps/llamaindex/pyproject.toml
+++ b/src/apps/llamaindex/pyproject.toml
@@ -30,7 +30,10 @@ classifiers = [
 python = "^3.8.1"
 trulens-core = { version = "^1.0.0" }
 trulens-apps-langchain = { version = "^1.0.0" }
-pydantic = "^2.4.2"
+pydantic = [
+  { version = "^1.0.0", python = "<3.9" },
+  { version = ">=2.4.2", python = ">=3.9" },
+]
 llama-index = ">=0.11"
 tiktoken = [
   { version = ">=0.3.3", python = "<3.13" },
diff --git a/src/apps/nemo/pyproject.toml b/src/apps/nemo/pyproject.toml
index fba182d0d..ac7ff7f23 100644
--- a/src/apps/nemo/pyproject.toml
+++ b/src/apps/nemo/pyproject.toml
@@ -30,7 +30,10 @@ classifiers = [
 python = "^3.8.1,<3.13"
 trulens-core = { version = "^1.0.0" }
 trulens-apps-langchain = { version = "^1.0.0" }
-pydantic = "^2.4.2"
+pydantic = [
+  { version = "^1.0.0", python = "<3.9" },
+  { version = ">=2.4.2", python = ">=3.9" },
+]
 nemoguardrails = ">=0.9"
 onnxruntime = [
   { version = ">=1.14.0,<1.20.0", python = "<3.10" },
diff --git a/src/core/pyproject.toml b/src/core/pyproject.toml
index 8380153d3..86c48bafc 100644
--- a/src/core/pyproject.toml
+++ b/src/core/pyproject.toml
@@ -35,7 +35,10 @@ numpy = [
 munch = "^2.5"
 dill = ">=0.3.8"
 typing_extensions = "^4.9"
-pydantic = "^2.4.2"
+pydantic = [
+  { version = "^1.0.0", python = "<3.9" },
+  { version = ">=2.4.2", python = ">=3.9" },
+]
 pandas = ">=1.0.0"
 rich = "^13.6"
 requests = "^2.31"
diff --git a/src/feedback/pyproject.toml b/src/feedback/pyproject.toml
index 949309b25..4e8d7f070 100644
--- a/src/feedback/pyproject.toml
+++ b/src/feedback/pyproject.toml
@@ -30,7 +30,10 @@ classifiers = [
 python = "^3.8.1"
 trulens-core = { version = "^1.0.0" }
 nltk = "^3.9.1"
-pydantic = "^2.4.2"
+pydantic = [
+  { version = "^1.0.0", python = "<3.9" },
+  { version = ">=2.4.2", python = ">=3.9" },
+]
 requests = "^2.31"
 numpy = [
   { version = ">=1.23.0,<1.25.0", python = "<3.9" },
diff --git a/src/providers/langchain/pyproject.toml b/src/providers/langchain/pyproject.toml
index 30f81292c..9c8e3b8eb 100644
--- a/src/providers/langchain/pyproject.toml
+++ b/src/providers/langchain/pyproject.toml
@@ -30,7 +30,14 @@ classifiers = [
 python = "^3.8.1"
 trulens-core = { version = "^1.0.0" }
 trulens-feedback = { version = "^1.0.0" }
-langchain-core = ">=0.2.0"
+langchain-core = [
+  { version = ">=0.2.0,<0.3.0", python = "<3.9" },
+  { version = ">=0.3.0", python = ">=3.9" },
+]
+pydantic = [
+  { version = "^1.0.0", python = "<3.9" },
+  { version = ">=2.4.2", python = ">=3.9" },
+]
 
 [tool.poetry.group.dev.dependencies]
 trulens-core = { path = "../../core" }
diff --git a/src/providers/openai/pyproject.toml b/src/providers/openai/pyproject.toml
index 7ac1e88a3..a6ffcfd81 100644
--- a/src/providers/openai/pyproject.toml
+++ b/src/providers/openai/pyproject.toml
@@ -31,7 +31,14 @@ python = "^3.8.1"
 trulens-core = { version = "^1.0.0" }
 trulens-feedback = { version = "^1.0.0" }
 openai = ">=1.52.1"
-langchain-community = ">=0.0.20"
+langchain-community = [
+  { version = ">=0.0.20,<0.3.0", python = "<3.9" },
+  { version = ">=0.3.0", python = ">=3.9" },
+]
+pydantic = [
+  { version = "^1.0.0", python = "<3.9" },
+  { version = ">=2.4.2", python = ">=3.9" },
+]
 
 [tool.poetry.group.dev.dependencies]
 trulens-core = { path = "../../core" }