diff --git a/src/components/nostr/compact/ReactionCompactPreview.tsx b/src/components/nostr/compact/ReactionCompactPreview.tsx
index c043a31..cb39993 100644
--- a/src/components/nostr/compact/ReactionCompactPreview.tsx
+++ b/src/components/nostr/compact/ReactionCompactPreview.tsx
@@ -26,7 +26,7 @@ export function ReactionCompactPreview({ event }: { event: NostrEvent }) {
 
   // Parse reaction content for custom emoji
   const parsedReaction = useMemo(() => {
-    const match = reaction.match(/^:([a-zA-Z0-9_]+):$/);
+    const match = reaction.match(/^:([a-zA-Z0-9_-]+):$/);
     if (match && customEmojis[match[1]]) {
       return {
         type: "custom" as const,
diff --git a/src/components/nostr/kinds/ReactionRenderer.tsx b/src/components/nostr/kinds/ReactionRenderer.tsx
index a04d699..25f5c37 100644
--- a/src/components/nostr/kinds/ReactionRenderer.tsx
+++ b/src/components/nostr/kinds/ReactionRenderer.tsx
@@ -32,7 +32,7 @@ export function Kind7Renderer({ event }: BaseEventProps) {
   // Parse reaction content to detect custom emoji shortcodes
   // Format: :shortcode: in the content
   const parsedReaction = useMemo(() => {
-    const match = reaction.match(/^:([a-zA-Z0-9_]+):$/);
+    const match = reaction.match(/^:([a-zA-Z0-9_-]+):$/);
     if (match && customEmojis[match[1]]) {
       return {
         type: "custom" as const,