diff --git a/ui/src/components/IssueChatThread.test.tsx b/ui/src/components/IssueChatThread.test.tsx
index aa6267e6..bc5a9903 100644
--- a/ui/src/components/IssueChatThread.test.tsx
+++ b/ui/src/components/IssueChatThread.test.tsx
@@ -282,7 +282,7 @@ describe("IssueChatThread", () => {
     expect(composer?.className).toContain("pb-[calc(env(safe-area-inset-bottom)+0.75rem)]");
 
     const editor = container.querySelector('textarea[aria-label="Issue chat editor"]') as HTMLTextAreaElement | null;
-    expect(editor?.dataset.contentClassName).toContain("max-h-[40dvh]");
+    expect(editor?.dataset.contentClassName).toContain("max-h-[28dvh]");
     expect(editor?.dataset.contentClassName).toContain("overflow-y-auto");
 
     act(() => {
diff --git a/ui/src/components/IssueChatThread.tsx b/ui/src/components/IssueChatThread.tsx
index 105762a8..65fcf09c 100644
--- a/ui/src/components/IssueChatThread.tsx
+++ b/ui/src/components/IssueChatThread.tsx
@@ -1532,7 +1532,7 @@ const IssueChatComposer = forwardRef<IssueChatComposerHandle, IssueChatComposerP
           imageUploadHandler={onImageUpload}
           bordered
           className="rounded-xl border-border/70 bg-background/95"
-          contentClassName="min-h-[72px] max-h-[40dvh] overflow-y-auto pr-1 text-sm scrollbar-auto-hide"
+          contentClassName="min-h-[72px] max-h-[28dvh] overflow-y-auto pr-1 text-sm scrollbar-auto-hide"
         />
 
         <div className="flex flex-wrap items-center justify-end gap-3 border-t border-border/60 pt-2">