diff --git a/.github/workflows/build_test.yml b/.github/workflows/build_test.yml
index 1def3acae99..6725719aa29 100644
--- a/.github/workflows/build_test.yml
+++ b/.github/workflows/build_test.yml
@@ -253,7 +253,7 @@ jobs:
         docker run --name the_container --interactive -v /:/host arm32v7/ubuntu:focal /bin/bash -c "
           apt update &&
           apt install -y git python3 python3-dev python3-pip &&
-          pip3 install cython==0.29.29 setuptools\<49.2.0 hypothesis==6.23.3 pytest==6.2.5 &&
+          pip3 install cython==0.29.30 setuptools\<49.2.0 hypothesis==6.23.3 pytest==6.2.5 &&
           ln -s /host/lib64 /lib64 &&
           ln -s /host/lib/x86_64-linux-gnu /lib/x86_64-linux-gnu &&
           ln -s /host/usr/arm-linux-gnueabihf /usr/arm-linux-gnueabihf &&
diff --git a/environment.yml b/environment.yml
index e503e9990ba..1d0c956ac8a 100644
--- a/environment.yml
+++ b/environment.yml
@@ -8,7 +8,7 @@ channels:
   - conda-forge
 dependencies:
   - python=3.9 #need to pin to avoid issues with builds
-  - cython
+  - cython=0.29.30
   - compilers
   - openblas
   - nomkl
diff --git a/pyproject.toml b/pyproject.toml
index b821ec73c15..b5564fc0779 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ requires = [
     "packaging==20.5; platform_machine=='arm64'",  # macos M1
     "setuptools==59.2.0",
     "wheel==0.37.0",
-    "Cython>=0.29.29,<3.0",
+    "Cython>=0.29.30,<3.0",
 ]
 
 
diff --git a/setup.py b/setup.py
index e5800fbeaf5..353b6c09693 100755
--- a/setup.py
+++ b/setup.py
@@ -259,7 +259,7 @@ def generate_cython():
     else:
         # Note: keep in sync with that in pyproject.toml
         # Update for Python 3.11
-        required_version = '0.29.29'
+        required_version = '0.29.30'
 
         if _pep440.parse(cython_version) < _pep440.Version(required_version):
             cython_path = Cython.__file__
diff --git a/test_requirements.txt b/test_requirements.txt
index cfef4afdb86..ff39dbcf40c 100644
--- a/test_requirements.txt
+++ b/test_requirements.txt
@@ -1,4 +1,4 @@
-cython>=0.29.29,<3.0
+cython>=0.29.30,<3.0
 wheel==0.37.0
 setuptools==59.2.0
 hypothesis==6.24.1