diff --git a/app/main/css/themes/dark.css b/app/main/css/themes/dark.css
index b27deacc..465987cd 100644
--- a/app/main/css/themes/dark.css
+++ b/app/main/css/themes/dark.css
@@ -1,7 +1,7 @@
 :root {
   /* Main fonts and colors */
   --main-background-color: rgba(62, 65, 67, 1);
-  --main-font: system;
+  --main-font: system, sans-serif;
   --main-font-color: white;
 
   /* border styles */
diff --git a/app/main/css/themes/light.css b/app/main/css/themes/light.css
index 6fa6a9a0..930a79e3 100644
--- a/app/main/css/themes/light.css
+++ b/app/main/css/themes/light.css
@@ -1,7 +1,7 @@
 :root {
   /* Main fonts and colors */
   --main-background-color: rgba(255, 255, 255, 1);
-  --main-font: system;
+  --main-font: system, sans-serif;
   --main-font-color: #000000;
 
   /* border styles */