diff --git a/src/components/EventDetailViewer.tsx b/src/components/EventDetailViewer.tsx
index 5ca5f03..c995a2c 100644
--- a/src/components/EventDetailViewer.tsx
+++ b/src/components/EventDetailViewer.tsx
@@ -428,7 +428,10 @@ export function EventDetailViewer({ pointer }: EventDetailViewerProps) {
       {/* Spell Tabs */}
       <div className="border-t border-border flex-1 overflow-hidden flex flex-col min-h-0">
         {eventSpells.length > 0 ? (
-          <Tabs className="flex flex-col h-full">
+          <Tabs
+            defaultValue={eventSpells[0]?.id}
+            className="flex flex-col h-full"
+          >
             <div className="flex items-center border-b">
               <Button
                 variant="ghost"
diff --git a/src/components/ProfileViewer.tsx b/src/components/ProfileViewer.tsx
index fdec649..814daa3 100644
--- a/src/components/ProfileViewer.tsx
+++ b/src/components/ProfileViewer.tsx
@@ -805,7 +805,10 @@ export function ProfileViewer({ pubkey }: ProfileViewerProps) {
       {/* Spell Tabs */}
       <div className="border-t border-border flex-1 overflow-hidden flex flex-col min-h-0">
         {pubkeySpells.length > 0 ? (
-          <Tabs className="flex flex-col h-full">
+          <Tabs
+            defaultValue={pubkeySpells[0]?.id}
+            className="flex flex-col h-full"
+          >
             <div className="flex items-center border-b">
               <Button
                 variant="ghost"
diff --git a/src/components/RelayViewer.tsx b/src/components/RelayViewer.tsx
index 2bfdcc0..2479934 100644
--- a/src/components/RelayViewer.tsx
+++ b/src/components/RelayViewer.tsx
@@ -323,7 +323,10 @@ export function RelayViewer({ url }: RelayViewerProps) {
       {/* Spell Tabs */}
       <div className="border-t border-border flex-1 overflow-hidden flex flex-col min-h-0">
         {relaySpells.length > 0 ? (
-          <Tabs className="flex flex-col h-full">
+          <Tabs
+            defaultValue={relaySpells[0]?.id}
+            className="flex flex-col h-full"
+          >
             <div className="flex items-center border-b">
               <Button
                 variant="ghost"