diff --git a/src/views/repos/Source/PeerBranchSelector.svelte b/src/views/repos/Source/PeerBranchSelector.svelte
index dd39e5e03..9d16c8703 100644
--- a/src/views/repos/Source/PeerBranchSelector.svelte
+++ b/src/views/repos/Source/PeerBranchSelector.svelte
@@ -66,6 +66,7 @@
     width: 40rem;
     max-height: 60vh;
     overflow-y: auto;
+    overscroll-behavior: contain;
     padding: 0.25rem;
   }
   .subgrid-item {