diff --git a/apt.txt b/apt.txt
index a18b53c..1368b51 100644
--- a/apt.txt
+++ b/apt.txt
@@ -1 +1,2 @@
-zip
\ No newline at end of file
+zip
+libglpk40
diff --git a/install.R b/install.R
index 3fa575b..7cfb68b 100644
--- a/install.R
+++ b/install.R
@@ -1 +1,5 @@
-install.packages("graphlayouts")
+install.packages(c(
+  "graphlayouts",
+  "ggraph",
+  "igraph"
+))
diff --git a/methodshub.qmd b/methodshub.qmd
index 3be4daa..42438bb 100644
--- a/methodshub.qmd
+++ b/methodshub.qmd
@@ -139,6 +139,8 @@ You can customize almost every aspect of the plot:
 
 ```{r}
 V(g)$deg <- degree(g)
+lay <- create_layout(g, layout = "stress")
+
 ggraph(lay) +
   geom_edge_link(alpha = 0.3) +
   geom_node_point(aes(size = deg), color = "tomato") +