diff --git a/backend-agent/pyproject.toml b/backend-agent/pyproject.toml
index 008e6f0..7e995be 100644
--- a/backend-agent/pyproject.toml
+++ b/backend-agent/pyproject.toml
@@ -26,7 +26,7 @@ dependencies = [
     'langchain-text-splitters>=0.3.0,<0.4.0',
     'PyYAML==6.0.3',
     'requests==2.32.5',
-    'unstructured==0.18.20',
+    'unstructured==0.18.21',
     'art==6.5',
     'pandas==2.3.3',
     'ollama==0.6.1',
diff --git a/backend-agent/uv.lock b/backend-agent/uv.lock
index 1e0612b..6c2d8ae 100644
--- a/backend-agent/uv.lock
+++ b/backend-agent/uv.lock
@@ -5442,7 +5442,7 @@ requires-dist = [
     { name = "tensorflow", marker = "extra == 'nlp'", specifier = "==2.20.0" },
     { name = "tensorflow-hub", marker = "extra == 'nlp'", specifier = "==0.16.1" },
     { name = "textattack", marker = "extra == 'nlp'", specifier = "==0.3.10" },
-    { name = "unstructured", specifier = "==0.18.20" },
+    { name = "unstructured", specifier = "==0.18.21" },
     { name = "weasyprint", specifier = "==66.0" },
 ]
 provides-extras = ["nlp"]
@@ -6040,7 +6040,7 @@ wheels = [
 
 [[package]]
 name = "unstructured"
-version = "0.18.20"
+version = "0.18.21"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "backoff" },
@@ -6065,9 +6065,9 @@ dependencies = [
     { name = "unstructured-client" },
     { name = "wrapt" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/62/9f/4548e655724598e71b494db9f4664d34b7e9d42fbf638723230ed8abcb45/unstructured-0.18.20.tar.gz", hash = "sha256:aeccb9af05ea2e5ec6a51854ca3e7851bbfd4e20dd7cc7d80a8c511f7d668d69", size = 1696275, upload-time = "2025-11-15T00:18:32.146Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/3c/2d/752aa318e92fe551f1c134b28b45d3421d8f1044ed977e74b177fdd8d7fc/unstructured-0.18.21.tar.gz", hash = "sha256:329f4bb960f2ea83df8526c0768bb0035bec13be2bf6b5ba8ed5976dcd773218", size = 1696481, upload-time = "2025-11-24T14:57:38.807Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/80/38/33859f5b3c2dae636c6d2cbd1fe1ef70461ffef63ab14b95aeae5e349d95/unstructured-0.18.20-py3-none-any.whl", hash = "sha256:bcb6630aa79393435464c6c0a43c8673042307fdebcdd6a2aab283045ce26d66", size = 1783090, upload-time = "2025-11-15T00:18:30.387Z" },
+    { url = "https://files.pythonhosted.org/packages/c2/98/e8ddcfadd762f8f69d84e14498c28adefdd8e2008f443077495984405c45/unstructured-0.18.21-py3-none-any.whl", hash = "sha256:8611c06017199fd7f131f3fbf586a458fd83074fc6aadac23640f6450a00e377", size = 1783346, upload-time = "2025-11-24T14:57:36.863Z" },
 ]
 
 [[package]]