diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 0000000..d9d6885
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1,3 @@
+*.ipynb filter=nbstripout
+
+*.ipynb diff=ipynb
diff --git a/README.md b/README.md
index 9bf4201..25b8c88 100644
--- a/README.md
+++ b/README.md
@@ -48,6 +48,7 @@ Jupyter notebooks have been set up to help explore the data. Once you have set u
 ```
 make notebook
 ```
+Notebooks use nbstripout to remove output before committing.
 
 ## Available data
 Raw, interim and processed data used in this analysis is kept in the `/data/` folder. Data is not tracked in the repository due to size constraints, but stored locally. A mirror is kept of the coastal folder J drive which you can
diff --git a/environment.yml b/environment.yml
index becc899..49fe9ff 100644
--- a/environment.yml
+++ b/environment.yml
@@ -16,6 +16,7 @@ dependencies:
   - matplotlib
   - line_profiler
   - nbformat
+  - nbstripout
   - notebook
   - numpy
   - pandas