diff --git a/docker/bin/nbdiff_checkpoint b/docker/bin/nbdiff_checkpoint
index 2969e1b..9ce7cd0 100755
--- a/docker/bin/nbdiff_checkpoint
+++ b/docker/bin/nbdiff_checkpoint
@@ -1,5 +1,5 @@
 #!/bin/bash
-if [ "$#" -ne 1 ]; then
+if [[ "$#" -lt 1 || "$1" =~ ^((-h)|(--help))$ ]] ; then
     echo "usage: nbdiff_checkpoint NOTEBOOK.ipynb"
     echo
     echo "Show differences between given jupyter notebook and its checkpointed version (in .ipynb_checkpoints subdirectory)"
@@ -8,9 +8,10 @@ fi
 
 DIRNAME=$(dirname "$1")
 BASENAME=$(basename "$1" .ipynb)
+shift
 
 WORKING_COPY=$DIRNAME/$BASENAME.ipynb
 CHECKPOINT_COPY=$DIRNAME/.ipynb_checkpoints/$BASENAME-checkpoint.ipynb
 
 echo "----- Analysing how to change $CHECKPOINT_COPY into $WORKING_COPY -----"
-nbdiff "$CHECKPOINT_COPY" "$WORKING_COPY" --ignore-details
+nbdiff "$CHECKPOINT_COPY" "$WORKING_COPY" --ignore-details "$@"