diff --git a/pyproject.toml b/pyproject.toml
index 1034cb12684..eb65f95c669 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -9,11 +9,12 @@ requires = [
     "numpy; python_version>='3.11'",
     # 1.8+ Not available for 3.7
     "scipy>=1.3,<1.8; python_version=='3.7'",
-    # 1.9+ Not available for 32-bit windows, so use 1.8 for all 3.8 & 3.9/Windows
-    "scipy>=1.3,<1.9; python_version=='3.8' and platform_system=='Windows'",
-    "scipy>=1.3,<1.9; python_version=='3.9' and platform_system=='Windows'",
+    # 1.9+ Not available for 32-bit windows, so use 1.8 for all 3.8 & 3.9 w/ 32-bit Windows
+    "scipy>=1.3,<1.9; python_version=='3.8' and platform_system=='Windows' and platform_machine=='x86'",
+    "scipy>=1.3,<1.9; python_version=='3.9' and platform_system=='Windows' and platform_machine=='x86'",
     # Cap at 1.9.x for all other platforms
-    "scipy>=1.3,<1.10; python_version>'3.7' or platform_system!='Windows'",
+    "scipy>=1.3,<1.10; (python_version>'3.7' or platform_system!='Windows' or platform_machine!='x86') and python_version<'3.12'",
+    "scipy>=1.9; python_version>='3.12'",
     "setuptools_scm[toml]>=7.0,<8"
 ]
 build-backend = "setuptools.build_meta"
diff --git a/requirements.txt b/requirements.txt
index 0bd9ddaacb7..083fdda7f45 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,7 +1,12 @@
 # Workaround for scipy build requirement
 numpy>=1.22.3; python_version=="3.10" and platform_system=="Windows" and platform_python_implementation != "PyPy"
-numpy>=1.17
-scipy>=1.3
+numpy>=1.17; python_version!="3.10" or platform_system!="Windows" or platform_python_implementation=="PyPy"
+# 1.8+ Not available for 3.7
+scipy>=1.3,<1.8; python_version=="3.7"
+# 1.9+ Not available for 32-bit windows, so use 1.8 for all 3.8 & 3.9 w/ 32-bit Windows
+scipy>=1.3,<1.9; python_version=="3.8" and platform_system=="Windows" and platform_machine=="x86"
+scipy>=1.3,<1.9; python_version=="3.9" and platform_system=="Windows" and platform_machine=="x86"
+scipy>=1.3; (python_version>"3.7" or platform_system!="Windows" or platform_machine!="x86") and python_version<"3.12"
 pandas>=0.25
 patsy>=0.5.2
 packaging>=21.3