diff --git a/pyproject.toml b/pyproject.toml
index 39ba8b6a..641fd2c9 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -203,6 +203,20 @@ constraint-dependencies = [
     "onnxruntime<1.24 ; python_full_version < '3.11'",
 ]
 
+# sympy 1.14.0 (latest, 2025-04-27) declares `mpmath>=1.1.0,<1.4`. That upper
+# bound is precautionary, not a known incompatibility: mpmath 1.4.1 imports
+# under sympy 1.14.0 and evaluates correctly — verified 2026-08-01 in a clean
+# venv, `sympy.sqrt(8).evalf()` -> 2.82842712474619 (exact expected value).
+#
+# Nothing in this repo imports sympy or mpmath directly; both arrive
+# transitively through torch. The override is what lets the dependency reach
+# its latest published release instead of being frozen by an upstream bound
+# that no longer reflects reality. Remove it once sympy widens the range.
+# source: PyPI sympy 1.14.0 requires_dist; empirical check above.
+override-dependencies = [
+    "mpmath>=1.4.1",
+]
+
 # ── CPU-only torch, resolved through the lock ────────────────────────────
 #
 # Every container in this repo installs torch from the PyTorch CPU index,
diff --git a/requirements/ci-postgresql.txt b/requirements/ci-postgresql.txt
index d4a772d4..4f82a528 100644
--- a/requirements/ci-postgresql.txt
+++ b/requirements/ci-postgresql.txt
@@ -760,9 +760,9 @@ more-itertools==11.1.0 \
     # via
     #   jaraco-classes
     #   jaraco-functools
-mpmath==1.3.0 \
-    --hash=sha256:7a28eb2a9774d00c7bc92411c19a89209d5da7c4c9a9e227be8330a23a25b91f \
-    --hash=sha256:a0b2b9fe80bbcd81a6647ff13108738cfb482d481d826cc0e02f5b35e5c88d2c
+mpmath==1.4.1 \
+    --hash=sha256:dc4f0ea2304480d4a9a48a94c1020571558ade522b44a6912efac63a586e140f \
+    --hash=sha256:efd6d1b75f09d69524a67609949812668b28e81ecbfe0ab449ced8c13e92642e
     # via sympy
 narwhals==2.24.0 ; python_full_version >= '3.11' \
     --hash=sha256:42fdedf44e5b2ca7505630d45b4ac3058f38d8485cba9fe1652ca23152df7489 \
diff --git a/requirements/ci-sqlite-min.txt b/requirements/ci-sqlite-min.txt
index 59865ad6..c10e16ef 100644
--- a/requirements/ci-sqlite-min.txt
+++ b/requirements/ci-sqlite-min.txt
@@ -726,9 +726,9 @@ more-itertools==11.1.0 \
     # via
     #   jaraco-classes
     #   jaraco-functools
-mpmath==1.3.0 \
-    --hash=sha256:7a28eb2a9774d00c7bc92411c19a89209d5da7c4c9a9e227be8330a23a25b91f \
-    --hash=sha256:a0b2b9fe80bbcd81a6647ff13108738cfb482d481d826cc0e02f5b35e5c88d2c
+mpmath==1.4.1 \
+    --hash=sha256:dc4f0ea2304480d4a9a48a94c1020571558ade522b44a6912efac63a586e140f \
+    --hash=sha256:efd6d1b75f09d69524a67609949812668b28e81ecbfe0ab449ced8c13e92642e
     # via sympy
 narwhals==2.24.0 ; python_full_version >= '3.11' \
     --hash=sha256:42fdedf44e5b2ca7505630d45b4ac3058f38d8485cba9fe1652ca23152df7489 \
diff --git a/requirements/ci-sqlite.txt b/requirements/ci-sqlite.txt
index 464054f5..34c09f89 100644
--- a/requirements/ci-sqlite.txt
+++ b/requirements/ci-sqlite.txt
@@ -760,9 +760,9 @@ more-itertools==11.1.0 \
     # via
     #   jaraco-classes
     #   jaraco-functools
-mpmath==1.3.0 \
-    --hash=sha256:7a28eb2a9774d00c7bc92411c19a89209d5da7c4c9a9e227be8330a23a25b91f \
-    --hash=sha256:a0b2b9fe80bbcd81a6647ff13108738cfb482d481d826cc0e02f5b35e5c88d2c
+mpmath==1.4.1 \
+    --hash=sha256:dc4f0ea2304480d4a9a48a94c1020571558ade522b44a6912efac63a586e140f \
+    --hash=sha256:efd6d1b75f09d69524a67609949812668b28e81ecbfe0ab449ced8c13e92642e
     # via sympy
 narwhals==2.24.0 ; python_full_version >= '3.11' \
     --hash=sha256:42fdedf44e5b2ca7505630d45b4ac3058f38d8485cba9fe1652ca23152df7489 \
diff --git a/requirements/ci-typecheck.txt b/requirements/ci-typecheck.txt
index 73af2794..4c88ea9a 100644
--- a/requirements/ci-typecheck.txt
+++ b/requirements/ci-typecheck.txt
@@ -766,9 +766,9 @@ more-itertools==11.1.0 \
     # via
     #   jaraco-classes
     #   jaraco-functools
-mpmath==1.3.0 \
-    --hash=sha256:7a28eb2a9774d00c7bc92411c19a89209d5da7c4c9a9e227be8330a23a25b91f \
-    --hash=sha256:a0b2b9fe80bbcd81a6647ff13108738cfb482d481d826cc0e02f5b35e5c88d2c
+mpmath==1.4.1 \
+    --hash=sha256:dc4f0ea2304480d4a9a48a94c1020571558ade522b44a6912efac63a586e140f \
+    --hash=sha256:efd6d1b75f09d69524a67609949812668b28e81ecbfe0ab449ced8c13e92642e
     # via sympy
 narwhals==2.24.0 ; python_full_version >= '3.11' \
     --hash=sha256:42fdedf44e5b2ca7505630d45b4ac3058f38d8485cba9fe1652ca23152df7489 \
diff --git a/requirements/devcontainer.txt b/requirements/devcontainer.txt
index bb2efd25..6899b66c 100644
--- a/requirements/devcontainer.txt
+++ b/requirements/devcontainer.txt
@@ -657,9 +657,9 @@ more-itertools==11.1.0 \
     # via
     #   jaraco-classes
     #   jaraco-functools
-mpmath==1.3.0 \
-    --hash=sha256:7a28eb2a9774d00c7bc92411c19a89209d5da7c4c9a9e227be8330a23a25b91f \
-    --hash=sha256:a0b2b9fe80bbcd81a6647ff13108738cfb482d481d826cc0e02f5b35e5c88d2c
+mpmath==1.4.1 \
+    --hash=sha256:dc4f0ea2304480d4a9a48a94c1020571558ade522b44a6912efac63a586e140f \
+    --hash=sha256:efd6d1b75f09d69524a67609949812668b28e81ecbfe0ab449ced8c13e92642e
     # via sympy
 narwhals==2.24.0 ; python_full_version >= '3.11' \
     --hash=sha256:42fdedf44e5b2ca7505630d45b4ac3058f38d8485cba9fe1652ca23152df7489 \
diff --git a/requirements/docker-runtime.txt b/requirements/docker-runtime.txt
index 470feff3..467913fa 100644
--- a/requirements/docker-runtime.txt
+++ b/requirements/docker-runtime.txt
@@ -657,9 +657,9 @@ more-itertools==11.1.0 \
     # via
     #   jaraco-classes
     #   jaraco-functools
-mpmath==1.3.0 \
-    --hash=sha256:7a28eb2a9774d00c7bc92411c19a89209d5da7c4c9a9e227be8330a23a25b91f \
-    --hash=sha256:a0b2b9fe80bbcd81a6647ff13108738cfb482d481d826cc0e02f5b35e5c88d2c
+mpmath==1.4.1 \
+    --hash=sha256:dc4f0ea2304480d4a9a48a94c1020571558ade522b44a6912efac63a586e140f \
+    --hash=sha256:efd6d1b75f09d69524a67609949812668b28e81ecbfe0ab449ced8c13e92642e
     # via sympy
 narwhals==2.24.0 ; python_full_version >= '3.11' \
     --hash=sha256:42fdedf44e5b2ca7505630d45b4ac3058f38d8485cba9fe1652ca23152df7489 \
diff --git a/requirements/release.txt b/requirements/release.txt
index c73b9b40..ce511a3d 100644
--- a/requirements/release.txt
+++ b/requirements/release.txt
@@ -724,9 +724,9 @@ more-itertools==11.1.0 \
     # via
     #   jaraco-classes
     #   jaraco-functools
-mpmath==1.3.0 \
-    --hash=sha256:7a28eb2a9774d00c7bc92411c19a89209d5da7c4c9a9e227be8330a23a25b91f \
-    --hash=sha256:a0b2b9fe80bbcd81a6647ff13108738cfb482d481d826cc0e02f5b35e5c88d2c
+mpmath==1.4.1 \
+    --hash=sha256:dc4f0ea2304480d4a9a48a94c1020571558ade522b44a6912efac63a586e140f \
+    --hash=sha256:efd6d1b75f09d69524a67609949812668b28e81ecbfe0ab449ced8c13e92642e
     # via sympy
 narwhals==2.24.0 ; python_full_version >= '3.11' \
     --hash=sha256:42fdedf44e5b2ca7505630d45b4ac3058f38d8485cba9fe1652ca23152df7489 \
diff --git a/requirements/runtime-postgresql.txt b/requirements/runtime-postgresql.txt
index b2c84870..283c5566 100644
--- a/requirements/runtime-postgresql.txt
+++ b/requirements/runtime-postgresql.txt
@@ -623,9 +623,9 @@ more-itertools==11.1.0 \
     # via
     #   jaraco-classes
     #   jaraco-functools
-mpmath==1.3.0 \
-    --hash=sha256:7a28eb2a9774d00c7bc92411c19a89209d5da7c4c9a9e227be8330a23a25b91f \
-    --hash=sha256:a0b2b9fe80bbcd81a6647ff13108738cfb482d481d826cc0e02f5b35e5c88d2c
+mpmath==1.4.1 \
+    --hash=sha256:dc4f0ea2304480d4a9a48a94c1020571558ade522b44a6912efac63a586e140f \
+    --hash=sha256:efd6d1b75f09d69524a67609949812668b28e81ecbfe0ab449ced8c13e92642e
     # via sympy
 narwhals==2.24.0 ; python_full_version >= '3.11' \
     --hash=sha256:42fdedf44e5b2ca7505630d45b4ac3058f38d8485cba9fe1652ca23152df7489 \
diff --git a/requirements/setup.txt b/requirements/setup.txt
index e69ecc7d..5f2c2fd0 100644
--- a/requirements/setup.txt
+++ b/requirements/setup.txt
@@ -926,9 +926,9 @@ more-itertools==11.1.0 \
     # via
     #   jaraco-classes
     #   jaraco-functools
-mpmath==1.3.0 \
-    --hash=sha256:7a28eb2a9774d00c7bc92411c19a89209d5da7c4c9a9e227be8330a23a25b91f \
-    --hash=sha256:a0b2b9fe80bbcd81a6647ff13108738cfb482d481d826cc0e02f5b35e5c88d2c
+mpmath==1.4.1 \
+    --hash=sha256:dc4f0ea2304480d4a9a48a94c1020571558ade522b44a6912efac63a586e140f \
+    --hash=sha256:efd6d1b75f09d69524a67609949812668b28e81ecbfe0ab449ced8c13e92642e
     # via sympy
 multidict==6.7.1 \
     --hash=sha256:03ede2a6ffbe8ef936b92cb4529f27f42be7f56afcdab5ab739cd5f27fb1cbf9 \
diff --git a/uv.lock b/uv.lock
index 8b4b7880..04a85c21 100644
--- a/uv.lock
+++ b/uv.lock
@@ -27,6 +27,7 @@ resolution-markers = [
 
 [manifest]
 constraints = [{ name = "onnxruntime", marker = "python_full_version < '3.11'", specifier = "<1.24" }]
+overrides = [{ name = "mpmath", specifier = ">=1.4.1" }]
 
 [[package]]
 name = "aiofile"
@@ -1917,11 +1918,11 @@ wheels = [
 
 [[package]]
 name = "mpmath"
-version = "1.3.0"
+version = "1.4.1"
 source = { registry = "https://pypi.org/simple" }
-sdist = { url = "https://files.pythonhosted.org/packages/e0/47/dd32fa426cc72114383ac549964eecb20ecfd886d1e5ccf5340b55b02f57/mpmath-1.3.0.tar.gz", hash = "sha256:7a28eb2a9774d00c7bc92411c19a89209d5da7c4c9a9e227be8330a23a25b91f", size = 508106, upload-time = "2023-03-07T16:47:11.061Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/c5/b0/6de8e78014ff1842a90cc9a56da6ccfb598a5390ed0257fcdb7d9680c18b/mpmath-1.4.1.tar.gz", hash = "sha256:efd6d1b75f09d69524a67609949812668b28e81ecbfe0ab449ced8c13e92642e", size = 2093211, upload-time = "2026-03-15T01:17:38.245Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/43/e3/7d92a15f894aa0c9c4b49b8ee9ac9850d6e63b03c9c32c0367a13ae62209/mpmath-1.3.0-py3-none-any.whl", hash = "sha256:a0b2b9fe80bbcd81a6647ff13108738cfb482d481d826cc0e02f5b35e5c88d2c", size = 536198, upload-time = "2023-03-07T16:47:09.197Z" },
+    { url = "https://files.pythonhosted.org/packages/13/f2/abeec3db71d221ccd3cd89d206be1fabf5a3ee7178862f5fba23a59607e0/mpmath-1.4.1-py3-none-any.whl", hash = "sha256:dc4f0ea2304480d4a9a48a94c1020571558ade522b44a6912efac63a586e140f", size = 567787, upload-time = "2026-03-15T01:17:36.392Z" },
 ]
 
 [[package]]