diff --git a/examples/manuals_llm_extraction/pyproject.toml b/examples/manuals_llm_extraction/pyproject.toml
index f7841b307..e01d62917 100644
--- a/examples/manuals_llm_extraction/pyproject.toml
+++ b/examples/manuals_llm_extraction/pyproject.toml
@@ -3,7 +3,7 @@ name = "manuals-llm-extraction"
 version = "0.1.0"
 description = "Simple example for cocoindex: extract structured information from a Markdown file using LLM."
 requires-python = ">=3.11"
-dependencies = ["cocoindex>=0.1.79", "marker-pdf>=1.5.2"]
+dependencies = ["cocoindex>=0.1.79", "marker-pdf>=1.8.5"]
 
 [tool.setuptools]
 packages = []
diff --git a/examples/paper_metadata/pyproject.toml b/examples/paper_metadata/pyproject.toml
index f87160b18..de95aaf27 100644
--- a/examples/paper_metadata/pyproject.toml
+++ b/examples/paper_metadata/pyproject.toml
@@ -6,7 +6,7 @@ requires-python = ">=3.11"
 dependencies = [
     "cocoindex[embeddings]>=0.1.83",
     "pypdf>=5.7.0",
-    "marker-pdf>=1.5.2",
+    "marker-pdf>=1.8.5",
 ]
 
 [tool.setuptools]
diff --git a/examples/pdf_embedding/pyproject.toml b/examples/pdf_embedding/pyproject.toml
index 82b89aded..b532ba82d 100644
--- a/examples/pdf_embedding/pyproject.toml
+++ b/examples/pdf_embedding/pyproject.toml
@@ -6,7 +6,7 @@ requires-python = ">=3.11"
 dependencies = [
     "cocoindex[embeddings]>=0.1.79",
     "python-dotenv>=1.0.1",
-    "marker-pdf>=1.5.2",
+    "marker-pdf>=1.8.5",
     "psycopg[binary,pool]",
     "jinja2>=3.1.6",
 ]