diff --git a/app/images/icons/Makefile b/app/images/icons/Makefile
index 7f53b0a..83218e1 100644
--- a/app/images/icons/Makefile
+++ b/app/images/icons/Makefile
@@ -13,23 +13,18 @@ ALL_ICONS := \
 
 all: $(ALL_ICONS)
 
-novnc-16.png: novnc-icon-sm.svg
-	convert -density 90 \
-		-background transparent "$<" "$@"
-novnc-24.png: novnc-icon-sm.svg
-	convert -density 135 \
-		-background transparent "$<" "$@"
-novnc-32.png: novnc-icon-sm.svg
-	convert -density 180 \
-		-background transparent "$<" "$@"
-
+# General conversion
 novnc-%.png: novnc-icon.svg
-	convert -density $$[`echo $*` * 90 / 48] \
-		-background transparent "$<" "$@"
+	convert -depth 8 -background transparent \
+		-size $*x$* "$(lastword $^)" "$@"
 
+# iOS icons use their own SVG
 novnc-ios-%.png: novnc-ios-icon.svg
 	convert -depth 8 -background transparent \
-		-size $*x$* "$<" "$@"
+		-size $*x$* "$(lastword $^)" "$@"
+
+# The smallest sizes are generated using a different SVG
+novnc-16.png novnc-24.png novnc-32.png: novnc-icon-sm.svg
 
 clean:
 	rm -f *.png
diff --git a/app/images/icons/novnc-144.png b/app/images/icons/novnc-144.png
index eee71f1..1707e33 100644
Binary files a/app/images/icons/novnc-144.png and b/app/images/icons/novnc-144.png differ
diff --git a/app/images/icons/novnc-16.png b/app/images/icons/novnc-16.png
index 42108f4..d4e2928 100644
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diff --git a/app/images/icons/novnc-192.png b/app/images/icons/novnc-192.png
index ef9201f..8c582b4 100644
Binary files a/app/images/icons/novnc-192.png and b/app/images/icons/novnc-192.png differ
diff --git a/app/images/icons/novnc-24.png b/app/images/icons/novnc-24.png
index 1106135..ee316e1 100644
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diff --git a/app/images/icons/novnc-32.png b/app/images/icons/novnc-32.png
index ff00dc3..6d9182a 100644
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diff --git a/app/images/icons/novnc-48.png b/app/images/icons/novnc-48.png
index f24cd6c..631a9bd 100644
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diff --git a/app/images/icons/novnc-64.png b/app/images/icons/novnc-64.png
index 6d0fb34..98375f8 100644
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diff --git a/app/images/icons/novnc-72.png b/app/images/icons/novnc-72.png
index 23163a2..26e4fba 100644
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diff --git a/app/images/icons/novnc-96.png b/app/images/icons/novnc-96.png
index 1a77c53..102e8a6 100644
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