diff --git a/integrations/unstructured/pyproject.toml b/integrations/unstructured/pyproject.toml
index 14f58594c1..c51f80e5ba 100644
--- a/integrations/unstructured/pyproject.toml
+++ b/integrations/unstructured/pyproject.toml
@@ -21,7 +21,7 @@ classifiers = [
   "Programming Language :: Python :: Implementation :: CPython",
   "Programming Language :: Python :: Implementation :: PyPy",
 ]
-dependencies = ["haystack-ai", "unstructured", "psutil"]
+dependencies = ["haystack-ai", "unstructured", "psutil", "unstructured-client<=0.25.9"]
 
 [project.urls]
 Documentation = "https://github.com/deepset-ai/haystack-core-integrations/tree/main/integrations/unstructured#readme"