diff --git a/_portfolio/science-challenge.md b/_portfolio/1-science-challenge.md
similarity index 100%
rename from _portfolio/science-challenge.md
rename to _portfolio/1-science-challenge.md
diff --git a/_portfolio/bamboobike.md b/_portfolio/2-bamboobike.md
similarity index 100%
rename from _portfolio/bamboobike.md
rename to _portfolio/2-bamboobike.md
diff --git a/_portfolio/heidelberg.md b/_portfolio/3-heidelberg.md
similarity index 100%
rename from _portfolio/heidelberg.md
rename to _portfolio/3-heidelberg.md