diff --git a/requirements-dev-lock.txt b/requirements-dev-lock.txt
index d0972326..8b5a0229 100644
--- a/requirements-dev-lock.txt
+++ b/requirements-dev-lock.txt
@@ -7,9 +7,9 @@
 atomicwrites==1.4.1 \
     --hash=sha256:81b2c9071a49367a7f770170e5eec8cb66567cfbbc8c73d20ce5ca4a8d71cf11
     # via -r requirements-dev.txt
-colorama==0.4.5 \
-    --hash=sha256:854bf444933e37f5824ae7bfc1e98d5bce2ebe4160d46b5edf346a89358e99da \
-    --hash=sha256:e6c6b4334fc50988a639d9b98aa429a0b57da6e17b9a44f0451f930b6967b7a4
+colorama==0.4.6 \
+    --hash=sha256:08695f5cb7ed6e0531a20572697297273c47b8cae5a63ffc6d6ed5c201be6e44 \
+    --hash=sha256:4f1d9991f5acc0ca119f9d443620b77f9d6b33703e51011c16baf57afb285fc6
     # via -r requirements-dev.txt
 coverage[toml]==7.2.7 \
     --hash=sha256:06a9a2be0b5b576c3f18f1a241f0473575c4a26021b52b2a85263a00f034d51f \
@@ -75,21 +75,21 @@ coverage[toml]==7.2.7 \
     # via
     #   -r requirements-dev.txt
     #   pytest-cov
-exceptiongroup==1.1.3 \
-    --hash=sha256:097acd85d473d75af5bb98e41b61ff7fe35efe6675e4f9370ec6ec5126d160e9 \
-    --hash=sha256:343280667a4585d195ca1cf9cef84a4e178c4b6cf2274caef9859782b567d5e3
+exceptiongroup==1.2.2 \
+    --hash=sha256:3111b9d131c238bec2f8f516e123e14ba243563fb135d3fe885990585aa7795b \
+    --hash=sha256:47c2edf7c6738fafb49fd34290706d1a1a2f4d1c6df275526b62cbb4aa5393cc
     # via pytest
-iniconfig==1.1.1 \
-    --hash=sha256:011e24c64b7f47f6ebd835bb12a743f2fbe9a26d4cecaa7f53bc4f35ee9da8b3 \
-    --hash=sha256:bc3af051d7d14b2ee5ef9969666def0cd1a000e121eaea580d4a313df4b37f32
+iniconfig==2.0.0 \
+    --hash=sha256:2d91e135bf72d31a410b17c16da610a82cb55f6b0477d1a902134b24a455b8b3 \
+    --hash=sha256:b6a85871a79d2e3b22d2d1b94ac2824226a63c6b741c88f7ae975f18b6778374
     # via pytest
-packaging==21.3 \
-    --hash=sha256:dd47c42927d89ab911e606518907cc2d3a1f38bbd026385970643f9c5b8ecfeb \
-    --hash=sha256:ef103e05f519cdc783ae24ea4e2e0f508a9c99b2d4969652eed6a2e1ea5bd522
+packaging==24.1 \
+    --hash=sha256:026ed72c8ed3fcce5bf8950572258698927fd1dbda10a5e981cdf0ac37f4f002 \
+    --hash=sha256:5b8f2217dbdbd2f7f384c41c628544e6d52f2d0f53c6d0c3ea61aa5d1d7ff124
     # via pytest
-pluggy==1.4.0 \
-    --hash=sha256:7db9f7b503d67d1c5b95f59773ebb58a8c1c288129a88665838012cfb07b8981 \
-    --hash=sha256:8c85c2876142a764e5b7548e7d9a0e0ddb46f5185161049a79b7e974454223be
+pluggy==1.5.0 \
+    --hash=sha256:2cffa88e94fdc978c4c574f15f9e59b7f4201d439195c3715ca9e2486f1d0cf1 \
+    --hash=sha256:44e1ad92c8ca002de6377e165f3e0f1be63266ab4d554740532335b9d75ea669
     # via pytest
 psutil==4.4.2 \
     --hash=sha256:10fbb631142a3200623f4ab49f8bf82c32b79b8fe179f6056d01da3dfc589da1 \
@@ -102,10 +102,6 @@ psutil==4.4.2 \
     --hash=sha256:e423dd9cb12256c742d1d56ec38bc7d2a7fa09287c82c41e475e68b9f932c2af \
     --hash=sha256:e44d6b758a96539e3e02336430d3f85263d43c470c5bad93572e9b6a86c67f76
     # via -r requirements-dev.txt
-pyparsing==3.0.9 \
-    --hash=sha256:2b020ecf7d21b687f219b71ecad3631f644a47f01403fa1d1036b0c6416d70fb \
-    --hash=sha256:5026bae9a10eeaefb61dab2f09052b9f4307d44aee4eda64b309723d8d206bbc
-    # via packaging
 pytest==8.1.1 \
     --hash=sha256:2a8386cfc11fa9d2c50ee7b2a57e7d898ef90470a7a34c4b949ff59662bb78b7 \
     --hash=sha256:ac978141a75948948817d360297b7aae0fcb9d6ff6bc9ec6d514b85d5a65c044
diff --git a/requirements-dev.txt b/requirements-dev.txt
index eb837d8e..0fba7747 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -2,7 +2,8 @@ psutil>=4.1.0,<5.0.0
 tabulate==0.7.5
 coverage==7.2.7
 wheel==0.43.0
-setuptools==67.8.0;python_version>="3.12"
+setuptools==71.1.0;python_version>="3.12"
+packaging==24.1;python_version>="3.12"  # Requirement for setuptools>=71
 
 # Pytest specific deps
 pytest==8.1.1
diff --git a/scripts/ci/install-dev-deps b/scripts/ci/install-dev-deps
index 903b0556..71e9badc 100755
--- a/scripts/ci/install-dev-deps
+++ b/scripts/ci/install-dev-deps
@@ -27,5 +27,11 @@ def run(command):
 if __name__ == "__main__":
     with cd(REPO_ROOT):
         if sys.version_info[:2] >= (3, 12):
-            run("pip install setuptools==67.8.0")
+            # Python 3.12+ no longer includes setuptools by default.
+
+            # Setuptools 71+ now prefers already installed versions
+            # of packaging _and_ broke the API for packaging<22.0.
+            # We'll pin to match what's in requirements-dev.txt.
+            run("pip install setuptools==71.1.0 packaging==24.1")
+
         run("pip install -r requirements-dev-lock.txt")