diff --git a/src/network/advanced.jl b/src/network/advanced.jl
index 0bfdb47..70e3040 100644
--- a/src/network/advanced.jl
+++ b/src/network/advanced.jl
@@ -26,7 +26,7 @@ function compute_advanced_data(data::NetworkData{T,V},
     idx = findfirst(x -> x < 1, j)
     idx != nothing && throw("Indices no good")
 
-    m = max(i[end], j[end])
+    m = max(maximum(i), maximum(j))
     A = sparse(i,j,v,m,m)
     A = A + A'
 
diff --git a/src/network/pairwise.jl b/src/network/pairwise.jl
index 0ab890b..7997d25 100644
--- a/src/network/pairwise.jl
+++ b/src/network/pairwise.jl
@@ -42,7 +42,7 @@ function compute_graph_data(data::NetworkData{T,V}, cfg)::GraphProblem{T,V} wher
     idx = findfirst(x -> x < 1, j)
     idx != nothing && throw("Indices no good")
 
-    m = max(i[end], j[end])
+    m = max(maximum(i), maximum(j))
     A = sparse(i,j,v,m,m)
     A = A + A'