diff --git a/examples/scripts/grpo_vlm.py b/examples/scripts/grpo_vlm.py
index 858508ad126..5e92d5bf668 100644
--- a/examples/scripts/grpo_vlm.py
+++ b/examples/scripts/grpo_vlm.py
@@ -46,7 +46,7 @@
     --log_completions
 
 # For HuggingFaceTB/SmolVLM2-2.2B-Instruct
-pip install num2words
+pip install num2words==0.5.14
 
 accelerate launch \
     --config_file examples/accelerate_configs/deepspeed_zero3.yaml \
diff --git a/examples/scripts/gspo.py b/examples/scripts/gspo.py
index 6a89f876cef..31dd4a98784 100644
--- a/examples/scripts/gspo.py
+++ b/examples/scripts/gspo.py
@@ -27,7 +27,7 @@
 pip install math_verify
 
 # For Qwen/Qwen3-0.6B
-pip install num2words
+pip install num2words==0.5.14
 
 accelerate launch \
     --config_file examples/accelerate_configs/deepspeed_zero3.yaml \
diff --git a/examples/scripts/online_dpo_vlm.py b/examples/scripts/online_dpo_vlm.py
index 78b2a89dc1d..39246bb4209 100644
--- a/examples/scripts/online_dpo_vlm.py
+++ b/examples/scripts/online_dpo_vlm.py
@@ -47,7 +47,7 @@
     --gradient_accumulation_steps 2
 
 # For HuggingFaceTB/SmolVLM2-2.2B-Instruct
-pip install num2words
+pip install num2words==0.5.14
 
 accelerate launch \
     --config_file examples/accelerate_configs/deepspeed_zero3.yaml \
diff --git a/examples/scripts/rloo.py b/examples/scripts/rloo.py
index 7101f4e6586..e9fb222f63b 100644
--- a/examples/scripts/rloo.py
+++ b/examples/scripts/rloo.py
@@ -25,7 +25,7 @@
 # ///
 
 """
-pip install math_verify num2words peft trackio vllm
+pip install math_verify num2words==0.5.14 peft trackio vllm
 export TRACKIO_PROJECT="RLOO-NuminaMath-TIR"
 accelerate launch --config_file examples/accelerate_configs/deepspeed_zero3.yaml examples/scripts/rloo.py
 """
diff --git a/setup.cfg b/setup.cfg
index df51313f944..fa431a70501 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -73,7 +73,7 @@ vllm =
 vlm =
     Pillow
     torchvision
-    num2words
+    num2words==0.5.14
 dev =
     %(bco)s
     %(deepspeed)s