diff --git a/pyproject.toml b/pyproject.toml
index b0937f5..97b9231 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -32,7 +32,7 @@ test = [
     "pytest>=9,<10",
     "pytest-cov>=7,<8",
     "pytest-xdist>=3,<4",
-    "deepdiff>=8,<9",
+    "deepdiff>=9,<10",
     "lxml-stubs>=0.5,<1",
 ]
 docs = ["pdoc>=16,<17"]
diff --git a/uv.lock b/uv.lock
index 51b98fe..dea9f76 100644
--- a/uv.lock
+++ b/uv.lock
@@ -81,7 +81,7 @@ provides-extras = ["all", "cli", "graphviz"]
 [package.metadata.requires-dev]
 docs = [{ name = "pdoc", specifier = ">=16,<17" }]
 test = [
-    { name = "deepdiff", specifier = ">=8,<9" },
+    { name = "deepdiff", specifier = ">=9,<10" },
     { name = "lxml-stubs", specifier = ">=0.5,<1" },
     { name = "pytest", specifier = ">=9,<10" },
     { name = "pytest-cov", specifier = ">=7,<8" },
@@ -297,14 +297,14 @@ toml = [
 
 [[package]]
 name = "deepdiff"
-version = "8.6.1"
+version = "9.0.0"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "orderly-set" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/19/76/36c9aab3d5c19a94091f7c6c6e784efca50d87b124bf026c36e94719f33c/deepdiff-8.6.1.tar.gz", hash = "sha256:ec56d7a769ca80891b5200ec7bd41eec300ced91ebcc7797b41eb2b3f3ff643a", size = 634054, upload-time = "2025-09-03T19:40:41.461Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/24/20/63dd34163ed07393968128dc8c7ab948c96e47c4ce76976ea533de64909d/deepdiff-9.0.0.tar.gz", hash = "sha256:4872005306237b5b50829803feff58a1dfd20b2b357a55de22e7ded65b2008a7", size = 151952, upload-time = "2026-03-30T05:52:23.769Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/f7/e6/efe534ef0952b531b630780e19cabd416e2032697019d5295defc6ef9bd9/deepdiff-8.6.1-py3-none-any.whl", hash = "sha256:ee8708a7f7d37fb273a541fa24ad010ed484192cd0c4ffc0fa0ed5e2d4b9e78b", size = 91378, upload-time = "2025-09-03T19:40:39.679Z" },
+    { url = "https://files.pythonhosted.org/packages/dc/c4/da7089cd7aa4ab554f56e18a7fb08dcfed8fd2ae91fa528f5b1be207a148/deepdiff-9.0.0-py3-none-any.whl", hash = "sha256:b1ae0dd86290d86a03de5fbee728fde43095c1472ae4974bdab23ab4656305bd", size = 170540, upload-time = "2026-03-30T05:52:22.008Z" },
 ]
 
 [[package]]