From 1785fdc7ec433e72cbb5fcba8b27443f8440d72a Mon Sep 17 00:00:00 2001
From: Richard Shadrach <45562402+rhshadrach@users.noreply.github.com>
Date: Wed, 31 Jan 2024 13:48:23 -0500
Subject: [PATCH] DEP: Loosely pin Cython to 3.0 (#56993)

---
 asv_bench/asv.conf.json | 2 +-
 environment.yml         | 2 +-
 pyproject.toml          | 2 +-
 requirements-dev.txt    | 2 +-
 setup.py                | 2 +-
 5 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/asv_bench/asv.conf.json b/asv_bench/asv.conf.json
index 9b0dc14fe6747..e02ff26ba14e9 100644
--- a/asv_bench/asv.conf.json
+++ b/asv_bench/asv.conf.json
@@ -41,7 +41,7 @@
     // pip (with all the conda available packages installed first,
     // followed by the pip installed packages).
     "matrix": {
-        "Cython": ["3.0.5"],
+        "Cython": ["3.0"],
         "matplotlib": [],
         "sqlalchemy": [],
         "scipy": [],
diff --git a/environment.yml b/environment.yml
index 58eb69ad1f070..5a2dd0b697084 100644
--- a/environment.yml
+++ b/environment.yml
@@ -8,7 +8,7 @@ dependencies:
 
   # build dependencies
   - versioneer[toml]
-  - cython=3.0.5
+  - cython~=3.0.5
   - meson[ninja]=1.2.1
   - meson-python=0.13.1
 
diff --git a/pyproject.toml b/pyproject.toml
index ffd3a7e1f1f33..96e8ea90afa59 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -5,7 +5,7 @@ requires = [
     "meson-python==0.13.1",
     "meson==1.2.1",
     "wheel",
-    "Cython==3.0.5",  # Note: sync with setup.py, environment.yml and asv.conf.json
+    "Cython~=3.0.5",  # Note: sync with setup.py, environment.yml and asv.conf.json
     # Any NumPy version should be fine for compiling.  Users are unlikely
     # to get a NumPy<1.25 so the result will be compatible with all relevant
     # NumPy versions (if not it is presumably compatible with their version).
diff --git a/requirements-dev.txt b/requirements-dev.txt
index 5a63e59e1db88..13691d114ece4 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -3,7 +3,7 @@
 
 pip
 versioneer[toml]
-cython==3.0.5
+cython~==3.0.5
 meson[ninja]==1.2.1
 meson-python==0.13.1
 pytest>=7.3.2
diff --git a/setup.py b/setup.py
index c7c76d0f7636a..737ebd270d1e4 100755
--- a/setup.py
+++ b/setup.py
@@ -37,7 +37,7 @@ def is_platform_mac():
 
 
 # note: sync with pyproject.toml, environment.yml and asv.conf.json
-min_cython_ver = "3.0.5"
+min_cython_ver = "3.0"
 
 try:
     from Cython import (