diff --git a/rsconcept/frontend/src/styling/setup.css b/rsconcept/frontend/src/styling/setup.css
index b6f1e3d4..ad92a6a6 100644
--- a/rsconcept/frontend/src/styling/setup.css
+++ b/rsconcept/frontend/src/styling/setup.css
@@ -130,6 +130,7 @@
 
   code {
     font-family: var(--font-math);
+    font-variant-ligatures: none;
   }
 
   li {
@@ -164,12 +165,14 @@
 
   summary::before {
     font-family: var(--font-math);
+    font-variant-ligatures: none;
     padding-right: 0.5rem;
     content: '+';
   }
 
   details[open] summary::before {
     font-family: var(--font-math);
+    font-variant-ligatures: none;
     padding-right: 0.5rem;
     content: '-';
   }
diff --git a/rsconcept/frontend/src/styling/utilities.css b/rsconcept/frontend/src/styling/utilities.css
index 78520a7a..17158dfe 100644
--- a/rsconcept/frontend/src/styling/utilities.css
+++ b/rsconcept/frontend/src/styling/utilities.css
@@ -13,6 +13,7 @@
 
 @utility font-math {
   font-family: var(--font-math);
+  font-variant-ligatures: none;
 }
 
 @utility cc-selected {