diff --git a/pyproject.toml b/pyproject.toml
index 9828610b..434e108a 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -3,7 +3,7 @@ name = "temporalio-samples"
 version = "0.1a1"
 description = "Temporal.io Python SDK samples"
 authors = [{ name = "Temporal Technologies Inc", email = "sdk@temporal.io" }]
-requires-python = "~=3.9"
+requires-python = ">=3.9"
 readme = "README.md"
 license = "MIT"
 dependencies = ["temporalio>=1.14.1,<2"]
diff --git a/uv.lock b/uv.lock
index 698794df..e1851c2d 100644
--- a/uv.lock
+++ b/uv.lock
@@ -1,6 +1,6 @@
 version = 1
 revision = 2
-requires-python = ">=3.9, <4"
+requires-python = ">=3.9"
 resolution-markers = [
     "python_full_version >= '3.13'",
     "python_full_version >= '3.12.4' and python_full_version < '3.13'",
@@ -2778,7 +2778,7 @@ bedrock = [
 cloud-export-to-parquet = [
     { name = "boto3" },
     { name = "numpy", marker = "python_full_version < '3.13'" },
-    { name = "pandas" },
+    { name = "pandas", marker = "python_full_version < '4'" },
     { name = "pyarrow" },
 ]
 dev = [
@@ -2806,9 +2806,9 @@ gevent = [
 ]
 langchain = [
     { name = "fastapi" },
-    { name = "langchain" },
-    { name = "langchain-openai" },
-    { name = "langsmith" },
+    { name = "langchain", marker = "python_full_version < '4'" },
+    { name = "langchain-openai", marker = "python_full_version < '4'" },
+    { name = "langsmith", marker = "python_full_version < '4'" },
     { name = "openai" },
     { name = "tqdm" },
     { name = "uvicorn", extra = ["standard"] },
@@ -2843,7 +2843,7 @@ bedrock = [{ name = "boto3", specifier = ">=1.34.92,<2" }]
 cloud-export-to-parquet = [
     { name = "boto3", specifier = ">=1.34.89,<2" },
     { name = "numpy", marker = "python_full_version >= '3.9' and python_full_version < '3.13'", specifier = ">=1.26.0,<2" },
-    { name = "pandas", marker = "python_full_version >= '3.9' and python_full_version < '4.0'", specifier = ">=2.2.2,<3" },
+    { name = "pandas", marker = "python_full_version >= '3.9' and python_full_version < '4'", specifier = ">=2.2.2,<3" },
     { name = "pyarrow", specifier = ">=19.0.1" },
 ]
 dev = [
@@ -2869,9 +2869,9 @@ encryption = [
 gevent = [{ name = "gevent", marker = "python_full_version >= '3.8'", specifier = "==25.4.2" }]
 langchain = [
     { name = "fastapi", specifier = ">=0.115.12" },
-    { name = "langchain", marker = "python_full_version >= '3.9' and python_full_version < '4.0'", specifier = ">=0.1.7,<0.2" },
-    { name = "langchain-openai", marker = "python_full_version >= '3.9' and python_full_version < '4.0'", specifier = ">=0.0.6,<0.0.7" },
-    { name = "langsmith", marker = "python_full_version >= '3.9' and python_full_version < '4.0'", specifier = ">=0.1.22,<0.2" },
+    { name = "langchain", marker = "python_full_version >= '3.9' and python_full_version < '4'", specifier = ">=0.1.7,<0.2" },
+    { name = "langchain-openai", marker = "python_full_version >= '3.9' and python_full_version < '4'", specifier = ">=0.0.6,<0.0.7" },
+    { name = "langsmith", marker = "python_full_version >= '3.9' and python_full_version < '4'", specifier = ">=0.1.22,<0.2" },
     { name = "openai", specifier = ">=1.4.0,<2" },
     { name = "tqdm", specifier = ">=4.62.0,<5" },
     { name = "uvicorn", extras = ["standard"], specifier = ">=0.24.0.post1,<0.25" },