diff --git a/.changeset/short-flies-tie.md b/.changeset/short-flies-tie.md
new file mode 100644
index 0000000000..6293917bd9
--- /dev/null
+++ b/.changeset/short-flies-tie.md
@@ -0,0 +1,5 @@
+---
+"@primer/css": patch
+---
+
+drop !important from details styling
diff --git a/src/base/base.scss b/src/base/base.scss
index dbf662b2c2..5d123ef253 100644
--- a/src/base/base.scss
+++ b/src/base/base.scss
@@ -100,7 +100,7 @@ details {
   &:not([open]) {
     // Set details content hidden by default for browsers that don't do this
     > *:not(summary) {
-      display: none !important;
+      display: none;
     }
   }
 }