diff --git a/transforms/language/pdf2parquet/python/src/pdf2parquet_transform.py b/transforms/language/pdf2parquet/python/src/pdf2parquet_transform.py
index 20ef49dc3..b115a300a 100644
--- a/transforms/language/pdf2parquet/python/src/pdf2parquet_transform.py
+++ b/transforms/language/pdf2parquet/python/src/pdf2parquet_transform.py
@@ -238,7 +238,7 @@ def _convert_pdf2parquet(
         num_pages = len(doc.pages)
         num_tables = len(doc.tables)
         num_doc_elements = len(doc.texts)
-        document_hash = np.uint64(doc.origin.binary_hash)
+        document_hash = str(doc.origin.binary_hash)  # we turn the uint64 hash into str, because it is easier to handle for pyarrow
 
         self._update_metrics(num_pages=num_pages, elapse_time=elapse_time)
 
diff --git a/transforms/language/pdf2parquet/python/test-data/expected/archive1.parquet b/transforms/language/pdf2parquet/python/test-data/expected/archive1.parquet
index f68ff66e1..27b97529d 100644
Binary files a/transforms/language/pdf2parquet/python/test-data/expected/archive1.parquet and b/transforms/language/pdf2parquet/python/test-data/expected/archive1.parquet differ
diff --git a/transforms/language/pdf2parquet/python/test-data/expected/metadata.json b/transforms/language/pdf2parquet/python/test-data/expected/metadata.json
index 330ee3a5c..f5961f843 100644
--- a/transforms/language/pdf2parquet/python/test-data/expected/metadata.json
+++ b/transforms/language/pdf2parquet/python/test-data/expected/metadata.json
@@ -5,8 +5,8 @@
     "job name": "pdf2parquet",
     "job type": "pure python",
     "job id": "job_id",
-    "start_time": "2024-11-11 21:04:30",
-    "end_time": "2024-11-11 21:04:38",
+    "start_time": "2024-11-13 08:35:51",
+    "end_time": "2024-11-13 08:36:23",
     "status": "success"
   },
   "code": {
@@ -36,18 +36,18 @@
     "num_processors": 0
   },
   "execution_stats": {
-    "cpus": 21.1,
+    "cpus": 147.5,
     "gpus": 0,
-    "memory": 32.09,
+    "memory": 33.72,
     "object_store": 0,
-    "execution time, min": 0.139
+    "execution time, min": 0.522
   },
   "job_output_stats": {
     "source_files": 2,
     "source_size": 605137,
     "result_files": 2,
-    "result_size": 32939,
-    "processing_time": 5.596,
+    "result_size": 33078,
+    "processing_time": 4.221,
     "nrows": 3,
     "nsuccess": 3,
     "nfail": 0,
diff --git a/transforms/language/pdf2parquet/python/test-data/expected/redp5110-ch1.parquet b/transforms/language/pdf2parquet/python/test-data/expected/redp5110-ch1.parquet
index 17a7cf950..3e08723a0 100644
Binary files a/transforms/language/pdf2parquet/python/test-data/expected/redp5110-ch1.parquet and b/transforms/language/pdf2parquet/python/test-data/expected/redp5110-ch1.parquet differ
diff --git a/transforms/language/pdf2parquet/python/test-data/expected_batch/metadata.json b/transforms/language/pdf2parquet/python/test-data/expected_batch/metadata.json
index 32023e56a..8756a013e 100644
--- a/transforms/language/pdf2parquet/python/test-data/expected_batch/metadata.json
+++ b/transforms/language/pdf2parquet/python/test-data/expected_batch/metadata.json
@@ -5,8 +5,8 @@
     "job name": "pdf2parquet",
     "job type": "pure python",
     "job id": "job_id",
-    "start_time": "2024-11-11 21:06:08",
-    "end_time": "2024-11-11 21:06:14",
+    "start_time": "2024-11-13 08:37:05",
+    "end_time": "2024-11-13 08:37:11",
     "status": "success"
   },
   "code": {
@@ -36,9 +36,9 @@
     "num_processors": 0
   },
   "execution_stats": {
-    "cpus": 21.5,
+    "cpus": 143.9,
     "gpus": 0,
-    "memory": 32.19,
+    "memory": 34.21,
     "object_store": 0,
     "execution time, min": 0.1
   },
@@ -46,12 +46,12 @@
     "source_files": 2,
     "source_size": 605137,
     "result_files": 1,
-    "processing_time": 3.353,
+    "processing_time": 3.364,
     "nrows": 3,
     "nsuccess": 3,
     "nfail": 0,
     "nskip": 0,
-    "result_size": 27147
+    "result_size": 27226
   },
   "source": {
     "name": "/Users/dol/codes/data-prep-kit/transforms/language/pdf2parquet/python/test-data/input",
diff --git a/transforms/language/pdf2parquet/python/test-data/expected_batch/redp5110-ch1.parquet b/transforms/language/pdf2parquet/python/test-data/expected_batch/redp5110-ch1.parquet
index c29b5db0e..9e3302c8c 100644
Binary files a/transforms/language/pdf2parquet/python/test-data/expected_batch/redp5110-ch1.parquet and b/transforms/language/pdf2parquet/python/test-data/expected_batch/redp5110-ch1.parquet differ
diff --git a/transforms/language/pdf2parquet/python/test-data/expected_json/archive1.parquet b/transforms/language/pdf2parquet/python/test-data/expected_json/archive1.parquet
index 42b0a245d..584cbea22 100644
Binary files a/transforms/language/pdf2parquet/python/test-data/expected_json/archive1.parquet and b/transforms/language/pdf2parquet/python/test-data/expected_json/archive1.parquet differ
diff --git a/transforms/language/pdf2parquet/python/test-data/expected_json/metadata.json b/transforms/language/pdf2parquet/python/test-data/expected_json/metadata.json
index ed05c6b34..35a8bd874 100644
--- a/transforms/language/pdf2parquet/python/test-data/expected_json/metadata.json
+++ b/transforms/language/pdf2parquet/python/test-data/expected_json/metadata.json
@@ -5,8 +5,8 @@
     "job name": "pdf2parquet",
     "job type": "pure python",
     "job id": "job_id",
-    "start_time": "2024-11-11 21:05:31",
-    "end_time": "2024-11-11 21:05:36",
+    "start_time": "2024-11-13 08:37:56",
+    "end_time": "2024-11-13 08:38:02",
     "status": "success"
   },
   "code": {
@@ -36,18 +36,18 @@
     "num_processors": 0
   },
   "execution_stats": {
-    "cpus": 21.4,
+    "cpus": 142.2,
     "gpus": 0,
-    "memory": 32.33,
+    "memory": 33.63,
     "object_store": 0,
-    "execution time, min": 0.096
+    "execution time, min": 0.1
   },
   "job_output_stats": {
     "source_files": 2,
     "source_size": 605137,
     "result_files": 2,
-    "result_size": 22850,
-    "processing_time": 3.229,
+    "result_size": 22993,
+    "processing_time": 3.422,
     "nrows": 3,
     "nsuccess": 3,
     "nfail": 0,
diff --git a/transforms/language/pdf2parquet/python/test-data/expected_json/redp5110-ch1.parquet b/transforms/language/pdf2parquet/python/test-data/expected_json/redp5110-ch1.parquet
index 0f4bda73e..915c07189 100644
Binary files a/transforms/language/pdf2parquet/python/test-data/expected_json/redp5110-ch1.parquet and b/transforms/language/pdf2parquet/python/test-data/expected_json/redp5110-ch1.parquet differ
diff --git a/transforms/language/pdf2parquet/python/test-data/expected_md_no_table_no_ocr/archive1.parquet b/transforms/language/pdf2parquet/python/test-data/expected_md_no_table_no_ocr/archive1.parquet
index 32bfa6d00..f1bbf6c77 100644
Binary files a/transforms/language/pdf2parquet/python/test-data/expected_md_no_table_no_ocr/archive1.parquet and b/transforms/language/pdf2parquet/python/test-data/expected_md_no_table_no_ocr/archive1.parquet differ
diff --git a/transforms/language/pdf2parquet/python/test-data/expected_md_no_table_no_ocr/metadata.json b/transforms/language/pdf2parquet/python/test-data/expected_md_no_table_no_ocr/metadata.json
index e8a3894bf..ad1709b3d 100644
--- a/transforms/language/pdf2parquet/python/test-data/expected_md_no_table_no_ocr/metadata.json
+++ b/transforms/language/pdf2parquet/python/test-data/expected_md_no_table_no_ocr/metadata.json
@@ -5,8 +5,8 @@
     "job name": "pdf2parquet",
     "job type": "pure python",
     "job id": "job_id",
-    "start_time": "2024-11-11 21:05:04",
-    "end_time": "2024-11-11 21:05:06",
+    "start_time": "2024-11-13 08:37:31",
+    "end_time": "2024-11-13 08:37:34",
     "status": "success"
   },
   "code": {
@@ -36,18 +36,18 @@
     "num_processors": 0
   },
   "execution_stats": {
-    "cpus": 21.6,
+    "cpus": 143.4,
     "gpus": 0,
-    "memory": 29.57,
+    "memory": 31.51,
     "object_store": 0,
-    "execution time, min": 0.041
+    "execution time, min": 0.042
   },
   "job_output_stats": {
     "source_files": 2,
     "source_size": 605137,
     "result_files": 2,
-    "result_size": 29555,
-    "processing_time": 1.997,
+    "result_size": 29694,
+    "processing_time": 2.077,
     "nrows": 3,
     "nsuccess": 3,
     "nfail": 0,
diff --git a/transforms/language/pdf2parquet/python/test-data/expected_md_no_table_no_ocr/redp5110-ch1.parquet b/transforms/language/pdf2parquet/python/test-data/expected_md_no_table_no_ocr/redp5110-ch1.parquet
index db8b58790..004f70d2d 100644
Binary files a/transforms/language/pdf2parquet/python/test-data/expected_md_no_table_no_ocr/redp5110-ch1.parquet and b/transforms/language/pdf2parquet/python/test-data/expected_md_no_table_no_ocr/redp5110-ch1.parquet differ
diff --git a/transforms/language/pdf2parquet/ray/test-data/expected/archive1.parquet b/transforms/language/pdf2parquet/ray/test-data/expected/archive1.parquet
index f68ff66e1..27b97529d 100644
Binary files a/transforms/language/pdf2parquet/ray/test-data/expected/archive1.parquet and b/transforms/language/pdf2parquet/ray/test-data/expected/archive1.parquet differ
diff --git a/transforms/language/pdf2parquet/ray/test-data/expected/metadata.json b/transforms/language/pdf2parquet/ray/test-data/expected/metadata.json
index 330ee3a5c..f5961f843 100644
--- a/transforms/language/pdf2parquet/ray/test-data/expected/metadata.json
+++ b/transforms/language/pdf2parquet/ray/test-data/expected/metadata.json
@@ -5,8 +5,8 @@
     "job name": "pdf2parquet",
     "job type": "pure python",
     "job id": "job_id",
-    "start_time": "2024-11-11 21:04:30",
-    "end_time": "2024-11-11 21:04:38",
+    "start_time": "2024-11-13 08:35:51",
+    "end_time": "2024-11-13 08:36:23",
     "status": "success"
   },
   "code": {
@@ -36,18 +36,18 @@
     "num_processors": 0
   },
   "execution_stats": {
-    "cpus": 21.1,
+    "cpus": 147.5,
     "gpus": 0,
-    "memory": 32.09,
+    "memory": 33.72,
     "object_store": 0,
-    "execution time, min": 0.139
+    "execution time, min": 0.522
   },
   "job_output_stats": {
     "source_files": 2,
     "source_size": 605137,
     "result_files": 2,
-    "result_size": 32939,
-    "processing_time": 5.596,
+    "result_size": 33078,
+    "processing_time": 4.221,
     "nrows": 3,
     "nsuccess": 3,
     "nfail": 0,
diff --git a/transforms/language/pdf2parquet/ray/test-data/expected/redp5110-ch1.parquet b/transforms/language/pdf2parquet/ray/test-data/expected/redp5110-ch1.parquet
index 17a7cf950..3e08723a0 100644
Binary files a/transforms/language/pdf2parquet/ray/test-data/expected/redp5110-ch1.parquet and b/transforms/language/pdf2parquet/ray/test-data/expected/redp5110-ch1.parquet differ