diff --git a/retina-scale b/retina-scale
index 1d2378d..d392bf2 100755
--- a/retina-scale
+++ b/retina-scale
@@ -25,7 +25,7 @@ def scale_retina(points, scale, in_file, out_dir)
 end
 
 raw_size, in_file, out_dir = ARGV
-size = raw_size.to_i
+size = raw_size.to_f
 unless size > 0
   puts "Invalid size: #{raw_size.inspect}"
   usage
diff --git a/scale-ios-app-icons b/scale-ios-app-icons
index a770677..d97ca19 100755
--- a/scale-ios-app-icons
+++ b/scale-ios-app-icons
@@ -19,7 +19,7 @@ if [[ ! -d "$OUT_DIR" ]]; then
   exit 2
 fi
 
-for SIZE in 29 40 60 76; do
+for SIZE in 29 40 60 76 83.5; do
   echo "* Generating app icons at $SIZE points"
   retina-scale $SIZE "$IN_FILE" "$OUT_DIR"
 done