diff --git a/content/tutorials/modeling_movement/GRASS_movement.qmd b/content/tutorials/modeling_movement/GRASS_movement.qmd
index bf57b53..5b40247 100644
--- a/content/tutorials/modeling_movement/GRASS_movement.qmd
+++ b/content/tutorials/modeling_movement/GRASS_movement.qmd
@@ -4,7 +4,7 @@ author: "Michael Barton & Anna Petrasova"
 date: 2025-02-10
 date-modified: today
 lightbox: true
-engine: knitter
+engine: knitr
 image: img_movement/thumbnail.webp
 format: 
   html:
diff --git a/content/tutorials/modeling_movement/GRASS_movement_pt.qmd b/content/tutorials/modeling_movement/GRASS_movement_pt.qmd
index 9df533e..79ed771 100644
--- a/content/tutorials/modeling_movement/GRASS_movement_pt.qmd
+++ b/content/tutorials/modeling_movement/GRASS_movement_pt.qmd
@@ -4,7 +4,7 @@ author: "Michael Barton, Letícia Correa, e Anna Petrasova"
 date: 2025-05-09
 date-modified: today
 lightbox: true
-engine: knitter
+engine: knitr
 image: img_movement/thumbnail.webp
 format: 
   html:
diff --git a/content/tutorials/terrain_and_DEMs/GRASS_terrain.qmd b/content/tutorials/terrain_and_DEMs/GRASS_terrain.qmd
index f3e5792..51cfb51 100644
--- a/content/tutorials/terrain_and_DEMs/GRASS_terrain.qmd
+++ b/content/tutorials/terrain_and_DEMs/GRASS_terrain.qmd
@@ -4,7 +4,7 @@ author: "Eunice Villaseñor Iribe and Michael Barton"
 date: 2025-06-23
 date-modified: today
 lightbox: true
-engine: knitter
+engine: knitr
 image: img_terrain/thumbnail.webp
 format: 
   html:
diff --git a/content/tutorials/terrain_and_DEMs/GRASS_terrain_pt.qmd b/content/tutorials/terrain_and_DEMs/GRASS_terrain_pt.qmd
index b4e5da2..77afdd0 100644
--- a/content/tutorials/terrain_and_DEMs/GRASS_terrain_pt.qmd
+++ b/content/tutorials/terrain_and_DEMs/GRASS_terrain_pt.qmd
@@ -4,7 +4,7 @@ author: "Eunice Villaseñor Iribe, Michael Barton, & Leticia Correa"
 date: 2025-06-23
 date-modified: today
 lightbox: true
-engine: knitter
+engine: knitr
 image: img_terrain/thumbnail.webp
 format: 
   html: