diff --git a/.github/workflows/linux-build.yml b/.github/workflows/linux-build.yml
index b18228205..2e1bf1a15 100644
--- a/.github/workflows/linux-build.yml
+++ b/.github/workflows/linux-build.yml
@@ -15,7 +15,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        versions: [{python: "3.10", numpy: "1.22"}, {python: "3.11", numpy: "1.25"}, {python: "3.12", numpy: "2.1"}]
+        versions: [{python: "3.11", numpy: "1.25"}, {python: "3.12", numpy: "2.3"}]
     steps:
       - uses: actions/checkout@v4
       - uses: actions/setup-python@v5
diff --git a/.github/workflows/windows-build.yml b/.github/workflows/windows-build.yml
index cdc90df91..4c219cebe 100644
--- a/.github/workflows/windows-build.yml
+++ b/.github/workflows/windows-build.yml
@@ -15,12 +15,12 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        numpy_version: ["1.21.6", "1.25.2", "2.1.3"]
+        numpy_version: ["1.25.2", "2.3.5"]
     steps:
       - uses: actions/checkout@v4
       - uses: conda-incubator/setup-miniconda@v3
         with:
-          python-version: "3.10"
+          python-version: "3.11"
           channels: conda-forge,defaults
           channel-priority: strict
           activate-environment: pyos-build
diff --git a/pyoptsparse/__init__.py b/pyoptsparse/__init__.py
index 9025bc6b1..38f82deea 100644
--- a/pyoptsparse/__init__.py
+++ b/pyoptsparse/__init__.py
@@ -1,4 +1,4 @@
-__version__ = "2.15.0"
+__version__ = "2.15.1"
 
 from .pyOpt_history import History
 from .pyOpt_variable import Variable
diff --git a/pyoptsparse/pyOpt_constraint.py b/pyoptsparse/pyOpt_constraint.py
index 7cb6bf3ec..55162cd73 100644
--- a/pyoptsparse/pyOpt_constraint.py
+++ b/pyoptsparse/pyOpt_constraint.py
@@ -240,7 +240,7 @@ def finalize(self, variables: OrderedDict, dvOffset, index: int):
             dvStart.append(dvOffset[dvGroup][0])
 
         # This sort wrt using the keys in dvOffset
-        self.wrt = [x for (y, x) in sorted(zip(dvStart, self.wrt))]
+        self.wrt = [x for (y, x) in sorted(zip(dvStart, self.wrt, strict=False))]
 
         # Now we know which dvGroups this constraint will have a
         # derivative with respect to (i.e. what is in the wrt list)
diff --git a/pyproject.toml b/pyproject.toml
index 7405b2758..b3723001f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -7,12 +7,12 @@ name = "pyoptsparse"
 description = "Python package for formulating and solving nonlinear constrained optimization problems"
 readme = "README.md"
 license = {file = "LICENSE"}
-requires-python = ">=3.9"
+requires-python = ">=3.11"
 dependencies = [
     "packaging",
     "sqlitedict>=1.6",
-    "numpy>=1.21",
-    "scipy>=1.7",
+    "numpy>=1.25",
+    "scipy>=1.11",
     "mdolab-baseclasses>=1.3.1"
 ]
 dynamic = ["version"]  # version is dynamically populated from meson project