diff --git a/sdks/python/container/base_image_requirements_manual.txt b/sdks/python/container/base_image_requirements_manual.txt
index bef89e9fd31e..3c26cdb0c0c3 100644
--- a/sdks/python/container/base_image_requirements_manual.txt
+++ b/sdks/python/container/base_image_requirements_manual.txt
@@ -25,7 +25,7 @@
 # Consider constraining requirements of Beam itself when necessary.
 
 bs4  # Commonly used HTML processing tool.
-cython>=3,<4
+cython>=3.2.5,<4
 # future is no longer a Beam dependency, but is an implicit dependency in
 # some versions of libraries that launch Beam pipelines, like tensorflow-transform.
 # Leaving 'future' in our containers for now prevent breaking tft users.
diff --git a/sdks/python/pyproject.toml b/sdks/python/pyproject.toml
index 97a9fe6141ea..2ded2f4bb105 100644
--- a/sdks/python/pyproject.toml
+++ b/sdks/python/pyproject.toml
@@ -29,7 +29,7 @@ requires = [
     # Numpy headers
     "numpy>=1.14.3,<2.3.0", # Update setup.py as well.
     # having cython here will create wheels that are platform dependent.
-    "cython>=3.0,<4",
+    "cython>=3.2.5,<4",
     ## deps for generating external transform wrappers:
     # also update PyYaml bounds in sdks:python:generateExternalTransformsConfig
     'pyyaml>=3.12,<7.0.0',