diff --git a/r_app/2_CI_data_prep.R b/r_app/2_CI_data_prep.R
index d12a2ea..03ee3f3 100644
--- a/r_app/2_CI_data_prep.R
+++ b/r_app/2_CI_data_prep.R
@@ -227,7 +227,7 @@ plot(x$CI, main = paste("CI map", dates$week))
 #plotRGB(x, main = paste("RGB image week", dates$week))
 
 # writeRaster(x, here(weekly_CI_mosaic ,paste0("week_", dates$week, "_", dates$year, ".tif")), overwrite=TRUE)
-writeRaster(x, here(weekly_CI_mosaic ,paste0("week_", dates$week, "_", dates$year, ".tif")), overwrite=TRUE)
+writeRaster(x, here(weekly_CI_mosaic ,paste0("week_", sprintf("%02d", dates$week), "_", dates$year, ".tif")), overwrite=TRUE)
 message("raster written/ made")
 message( here(weekly_CI_mosaic ,paste0("week_", dates$week, "_", dates$year, ".tif")))