diff --git a/front/src/composables/useTheme.ts b/front/src/composables/useTheme.ts
index 5d922c332..8d5ece70e 100644
--- a/front/src/composables/useTheme.ts
+++ b/front/src/composables/useTheme.ts
@@ -2,11 +2,11 @@ import { useColorMode, usePreferredDark } from '@vueuse/core'
 import { computed } from 'vue'
 
 const theme = useColorMode({
-  selector: 'body',
+  selector: 'html',
   modes: {
     auto: '',
-    light: 'theme-light',
-    dark: 'theme-dark'
+    light: 'theme-light light',
+    dark: 'theme-dark dark'
   },
   emitAuto: true
 })
diff --git a/front/src/style/globals/_app.scss b/front/src/style/globals/_app.scss
index f3be00d96..1fc69cd8c 100644
--- a/front/src/style/globals/_app.scss
+++ b/front/src/style/globals/_app.scss
@@ -1,6 +1,7 @@
 
 html {
   scroll-behavior: smooth;
+  font-size: 16px;
 }
 
 :root {