diff --git a/README.md b/README.md
index f39d019..ecc3443 100644
--- a/README.md
+++ b/README.md
@@ -7,7 +7,7 @@
 This mod features a modern, powerful inventory menu with a good user experience.
 **`i3`** provides a rich [**API**](https://github.com/minetest-mods/i3/blob/master/API.md) for mod developers who want to extend it.
 
-This mod requires **Minetest 5.4+**
+This mod requires **Minetest 5.6+**
 
 #### List of features:
    - Crafting Guide (survival mode only)
@@ -43,6 +43,8 @@ To use this mod in the best conditions:
 If the inventory's font size is too big on certain setups (namely Windows 10/11 or 144 DPI display), you should lower the
 value of the setting `display_density_factor` in your `minetest.conf`. Note that the change is applied after restart.
 
+You can also use the font size slider in the inventory, settings window. 
+
 #### Notes
 
 `i3` uses a larger inventory than the usual inventories in Minetest games.
diff --git a/src/gui.lua b/src/gui.lua
index 30ab069..1c30d6c 100644
--- a/src/gui.lua
+++ b/src/gui.lua
@@ -621,7 +621,9 @@ local function show_popup(fs, data)
 
 			local sign = (data.font_size > 0 and "+") or (data.font_size > 0 and "-") or ""
 			label(5.4, 10.55, ES"Font size" .. fmt(": %s", sign .. data.font_size))
-			fs"scrollbaroptions[min=-5;max=5;smallstep=1;largestep=1;thumbsize=2]"
+
+			local range = 5
+			fs(fmt("scrollbaroptions[min=-%u;max=%u;smallstep=1;largestep=1;thumbsize=2]", range, range))
 			fs(fmt("scrollbar[5.4,10.8;2.5,0.25;horizontal;sb_font_size;%d]", data.font_size))
 
 			fs(fmt("tooltip[cb_inv_compress;%s;#707070;#fff]",