diff --git a/pyproject.toml b/pyproject.toml
index f9a33a861a..cddc425704 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -37,7 +37,7 @@ triton = [
 ]
 
 huggingface = [
-    "unsloth_zoo>=2025.5.10",
+    "unsloth_zoo>=2025.5.11",
     "packaging",
     "tyro",
     "transformers>=4.51.3,!=4.47.0,!=4.52.0,!=4.52.1,!=4.52.2",
@@ -381,7 +381,7 @@ colab-ampere-torch220 = [
     "flash-attn>=2.6.3",
 ]
 colab-new = [
-    "unsloth_zoo>=2025.5.9",
+    "unsloth_zoo>=2025.5.11",
     "packaging",
     "tyro",
     "transformers>=4.51.3,!=4.47.0,!=4.52.0,!=4.52.1,!=4.52.2",
diff --git a/unsloth/models/_utils.py b/unsloth/models/_utils.py
index 9325428060..4bfaf6a963 100644
--- a/unsloth/models/_utils.py
+++ b/unsloth/models/_utils.py
@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-__version__ = "2025.5.8"
+__version__ = "2025.5.9"
 
 __all__ = [
     "SUPPORTS_BFLOAT16",
diff --git a/unsloth/models/rl.py b/unsloth/models/rl.py
index 24cd5e60af..8b6dd16da5 100644
--- a/unsloth/models/rl.py
+++ b/unsloth/models/rl.py
@@ -358,7 +358,7 @@ def _patch_trl_rl_trainers(trainer_file = "grpo_trainer"):
         "from unsloth_zoo.vision_utils import UnslothVisionDataCollator\n"\
         "if not isinstance(data_collator, UnslothVisionDataCollator):\n"\
         "    if isinstance(data_collator, DataCollatorForSeq2Seq) and 'labels' not in train_dataset.column_names:\n"\
-        "        data_collator = TransformersDataCollatorForLanguageModeling(__tokenizer, mlm = False)\n"\
+        "        data_collator = TransformersDataCollatorForLanguageModeling(__tokenizer, mlm = False, mlm_probability = 0.0)\n"\
         "    elif isinstance(data_collator, TransformersDataCollatorForLanguageModeling) and 'labels' in train_dataset.column_names:\n"\
         "        data_collator = DataCollatorForSeq2Seq(__tokenizer)\n"\
         "else:\n"\
@@ -374,7 +374,7 @@ def _patch_trl_rl_trainers(trainer_file = "grpo_trainer"):
         "        if isinstance(data_collator, DataCollatorForSeq2Seq):\n"\
         "            data_collator = DataCollatorForSeq2Seq(__tokenizer.tokenizer)\n"\
         "        else:\n"\
-        "            data_collator = TransformersDataCollatorForLanguageModeling(__tokenizer.tokenizer, mlm = False)\n"
+        "            data_collator = TransformersDataCollatorForLanguageModeling(__tokenizer.tokenizer, mlm = False, mlm_probability = 0.0)\n"
         extra_args += pad_check
     pass