diff --git a/dalla_data_processing/cli.py b/dalla_data_processing/cli.py
index bf02f7e..e891459 100644
--- a/dalla_data_processing/cli.py
+++ b/dalla_data_processing/cli.py
@@ -651,7 +651,15 @@ def pack(
             tokenizer = RBPETokenizer.from_pretrained(config_data["tokenizer_path"])
         except ImportError:
             logger.error("Missing rbpe package")
-            logger.error("Install with: pip install rbpe")
+            logger.error(
+                "rbpe is not included in the default installation due to "
+                "dependency conflicts with camel-tools (transformers version requirements)"
+            )
+            logger.error("Install separately with: pip install rbpe")
+            logger.error(
+                "Note: Installing rbpe may require a separate environment "
+                "if you also use dedup/stem/quality features"
+            )
             sys.exit(1)
     else:
         try:
diff --git a/dalla_data_processing/quality/checker.py b/dalla_data_processing/quality/checker.py
index 077bbb1..f986ed6 100644
--- a/dalla_data_processing/quality/checker.py
+++ b/dalla_data_processing/quality/checker.py
@@ -11,6 +11,7 @@
 from types import MethodType
 from typing import Any
 
+from camel_tools.data.catalogue import Catalogue
 from camel_tools.disambig.bert import BERTUnfactoredDisambiguator
 from camel_tools.disambig.mle import MLEDisambiguator
 from datasets import Dataset
@@ -53,6 +54,25 @@ def __init__(self, timeout: int = 3600, model: str = "mle", use_gpu: bool = Fals
 
     def _init_disambiguator(self):
         """Initialize and configure the disambiguator with caching."""
+        # Install required CAMeL Tools packages based on model type
+        logger.info("Checking CAMeL Tools data packages...")
+        catalogue = Catalogue.load_catalogue()
+
+        try:
+            catalogue.download_package("morphology-db-msa-r13")
+            catalogue.download_package("disambig-mle-calima-msa-r13")
+            logger.info("msa-r13 packages installed")
+        except Exception as e:
+            logger.warning(f"Package installation warning: {e}")
+
+        # Install BERT package if using BERT model
+        if self.model == "bert":
+            try:
+                catalogue.download_package("disambig-bert-unfactored-all")
+                logger.info("BERT package installed")
+            except Exception as e:
+                logger.warning(f"BERT package installation warning: {e}")
+
         if self.model == "mle":
             self.disambiguator = MLEDisambiguator.pretrained()
             logger.info("MLE disambiguator loaded")
diff --git a/dalla_data_processing/stemming/stemmer.py b/dalla_data_processing/stemming/stemmer.py
index 8bed063..7cbe0df 100644
--- a/dalla_data_processing/stemming/stemmer.py
+++ b/dalla_data_processing/stemming/stemmer.py
@@ -473,12 +473,19 @@ def stem_dataset(
     catalogue = Catalogue.load_catalogue()
     try:
         catalogue.download_package("morphology-db-msa-r13")
-        if model == "mle":
-            catalogue.download_package("disambig-mle-calima-msa-r13")
-        # For BERT, let it download automatically when pretrained() is called
-        logger.info("CAMeL Tools data packages ready")
+        catalogue.download_package("disambig-mle-calima-msa-r13")
+        logger.info("msa-r13 packages installed")
     except Exception as e:
-        logger.warning(f"Could not verify CAMeL packages: {e}")
+        logger.warning(f"Package installation warning: {e}")
+
+    if model == "bert":
+        try:
+            catalogue.download_package("disambig-bert-unfactored-all")
+            logger.info("BERT package installed")
+        except Exception as e:
+            logger.warning(f"BERT package installation warning: {e}")
+
+    logger.info("CAMeL Tools data packages ready")
 
     logger.info("Loading additional words lists...")
     words_dir = os.path.join(os.path.dirname(__file__), "data")
@@ -597,15 +604,21 @@ def stem(
     if not all(isinstance(t, str) for t in text_list):
         raise TypeError("All items in text list must be strings")
 
-    # Initialize disambiguator (cached globally if possible)
     logger.info(f"Initializing {model.upper()} disambiguator...")
     catalogue = Catalogue.load_catalogue()
     try:
         catalogue.download_package("morphology-db-msa-r13")
-        if model == "mle":
-            catalogue.download_package("disambig-mle-calima-msa-r13")
+        catalogue.download_package("disambig-mle-calima-msa-r13")
+        logger.info("msa-r13 packages installed")
     except Exception as e:
-        logger.warning(f"Could not verify CAMeL packages: {e}")
+        logger.warning(f"Package installation warning: {e}")
+
+    if model == "bert":
+        try:
+            catalogue.download_package("disambig-bert-unfactored-all")
+            logger.info("BERT package installed")
+        except Exception as e:
+            logger.warning(f"BERT package installation warning: {e}")
 
     if model == "mle":
         disambiguator = MLEDisambiguator.pretrained("calima-msa-r13", cache_size=1_000_000)
diff --git a/pyproject.toml b/pyproject.toml
index cbf1851..c0dd637 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -11,7 +11,7 @@ authors = [
     {name = "Digital Research Unit - Arab Center", email = "dru@dohainstitute.edu.qa"}
 ]
 readme = "README.md"
-requires-python = ">=3.12"
+requires-python = ">=3.12,<3.13"
 keywords = ["arabic", "nlp", "data-processing", "deduplication", "stemming", "readability", "quality"]
 classifiers = [
     "Intended Audience :: Developers",
@@ -39,23 +39,24 @@ dev = [
     "pre-commit>=3.0.0",
 ]
 dedup = [
-    "camel-tools>=1.5.0",
+    "camel-tools==1.5.7",
 ]
 dedup-native = [
     "cffi>=1.15.0",
 ]
 stem = [
-    "camel-tools>=1.5.0",
+    "camel-tools==1.5.7",
 ]
 quality = [
-    "camel-tools>=1.5.0",
+    "camel-tools==1.5.7",
 ]
 readability = [
     "textstat>=0.7.0",
 ]
 pack = [
     "sentencepiece>=0.2.0",
-    "rbpe",
+    # "rbpe",  # excluded due to transformers version conflict with camel-tools
+                # users should install separately if needed: pip install rbpe
     "pyyaml",
 ]
 all = [