diff --git a/docs/INSTALL.md b/docs/INSTALL.md
index ea45181df..76bc51746 100644
--- a/docs/INSTALL.md
+++ b/docs/INSTALL.md
@@ -79,7 +79,7 @@ We need to provide the appropriate version of the `mmcv-full` package as well as
 #### CUDA-Version Installation Example
 <div class="termy">
 ```console
-$ pip install mmcv-full=="1.3.3" -f https://download.openmmlab.com/mmcv/dist/CUDA_VERSION/TORCH_VERSION/index.html --upgrade
+$ pip install mmcv-full=="1.3.8" -f https://download.openmmlab.com/mmcv/dist/CUDA_VERSION/TORCH_VERSION/index.html --upgrade
 $ pip install mmdet
 ```
 </div>
@@ -87,7 +87,7 @@ $ pip install mmdet
 #### CPU-Version Installation
 <div class="termy">
 ```console
-$ pip install mmcv-full=="1.3.3+torch.1.8.0+cpu" -f https://download.openmmlab.com/mmcv/dist/index.html --upgrade
+$ pip install mmcv-full=="1.3.8+torch.1.8.0+cpu" -f https://download.openmmlab.com/mmcv/dist/index.html --upgrade
 $ pip install mmdet
 ```
 </div>
diff --git a/icevision/visualize/draw_data.py b/icevision/visualize/draw_data.py
index 528f970e6..dca107055 100644
--- a/icevision/visualize/draw_data.py
+++ b/icevision/visualize/draw_data.py
@@ -238,7 +238,7 @@ def draw_label(
         caption = str(label)
     if prettify:
         # We could introduce a callback here for more complex label renaming
-        caption = prefix + caption
+        caption = str(prefix) + str(caption)
         caption = prettify_func(caption)
 
     # Append label confidence to caption if applicable