diff --git a/backend-agent/pyproject.toml b/backend-agent/pyproject.toml
index 488ba48..f586a25 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==0.18.15',
+    'unstructured==0.18.18',
     'art==6.5',
     'pandas==2.3.3',
     'ollama==0.6.0',
diff --git a/backend-agent/uv.lock b/backend-agent/uv.lock
index 17b90b0..f887a58 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 = "==0.18.15" },
+    { name = "unstructured", specifier = "==0.18.18" },
     { name = "weasyprint", specifier = "==66.0" },
 ]
 provides-extras = ["nlp"]
@@ -6040,7 +6040,7 @@ wheels = [
 
 [[package]]
 name = "unstructured"
-version = "0.18.15"
+version = "0.18.18"
 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/6c/08/cf969b274f652e2fe48a6807b827498c7142dc749bdbd46ab24ea97a5fd5/unstructured-0.18.15.tar.gz", hash = "sha256:81d8481280a4ac5cefe74bdb6db3687e8f240d5643706f86728eac39549112b5", size = 1691102, upload-time = "2025-09-17T14:30:59.524Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/25/46/ed7c358d0a8851ff10e761888baade66a7061e05c40092f8239b98b860c5/unstructured-0.18.18.tar.gz", hash = "sha256:cfe6c84a36d374e5767930e13cfc10622357b3b68a5b7c735fdb1eeca08c6b57", size = 1693431, upload-time = "2025-11-07T01:07:20.186Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/62/24/7b8a8a9c23b209dc484b0d82905847c5f6b96a579bade367f3f3e40263f3/unstructured-0.18.15-py3-none-any.whl", hash = "sha256:f05b1defcbe8190319d30da8adddbb888f74bf8ec7f65886867d7dca41d67ad0", size = 1778900, upload-time = "2025-09-17T14:30:57.872Z" },
+    { url = "https://files.pythonhosted.org/packages/88/32/060aa452bb92384ab6f07eaee736131f894c6023a35d5fc4870621af13c3/unstructured-0.18.18-py3-none-any.whl", hash = "sha256:d5189bdd5e2a1c5ed3cc289cfb4fb483c6f2dd544b42744bdc5b81d3388ea527", size = 1779719, upload-time = "2025-11-07T01:07:18.156Z" },
 ]
 
 [[package]]