diff --git a/data/com.github.johnfactotum.Foliate.gschema.xml b/data/com.github.johnfactotum.Foliate.gschema.xml
index 8b4660fc..048f235e 100644
--- a/data/com.github.johnfactotum.Foliate.gschema.xml
+++ b/data/com.github.johnfactotum.Foliate.gschema.xml
@@ -61,13 +61,13 @@
     <key name="gap" type="d">
       <default>0.06</default>
     </key>
-    <key name="max-inline-size" type="i">
+    <key name="max-inline-size" type="u">
       <default>720</default>
     </key>
-    <key name="max-block-size" type="i">
+    <key name="max-block-size" type="u">
       <default>1440</default>
     </key>
-    <key name="max-column-count" type="i">
+    <key name="max-column-count" type="u">
       <default>2</default>
     </key>
     <key name="scrolled" type="b">
@@ -92,10 +92,10 @@
     <key name="default" type="u">
       <default>0</default>
     </key>
-    <key name="default-size" type="d">
-      <default>12</default>
+    <key name="default-size" type="u">
+      <default>16</default>
     </key>
-    <key name="minimum-size" type="d">
+    <key name="minimum-size" type="u">
       <default>0</default>
     </key>
   </schema>
diff --git a/src/book-viewer.js b/src/book-viewer.js
index 30ae43a1..f7bbf606 100644
--- a/src/book-viewer.js
+++ b/src/book-viewer.js
@@ -237,7 +237,7 @@ GObject.registerClass({
         'sans-serif': 'Sans 12',
         'monospace': 'Monospace 12',
         'default': 'serif',
-        'default-size': 12,
+        'default-size': 16,
     })
     viewSettings = new ViewSettings({
         'brightness': 1,
@@ -341,9 +341,9 @@ GObject.registerClass({
             monospace_font_family: getFamily(font.monospace),
             default_font_family: getFamily(font.default === 1
                 ? font.sans_serif : font.serif),
-            default_font_size: WebKit.Settings.font_size_to_pixels(font.default_size),
+            default_font_size: font.default_size,
             // TODO: disable this for fixed-layout
-            minimum_font_size: WebKit.Settings.font_size_to_pixels(font.minimum_size),
+            minimum_font_size: font.minimum_size,
         })
         const view = this.viewSettings
         if (this.#bookReady) await this.#exec('reader.setAppearance', {