diff --git a/constants/styles/announcement.styles.ts b/constants/styles/announcement.styles.ts
index a8274dd..cf408aa 100644
--- a/constants/styles/announcement.styles.ts
+++ b/constants/styles/announcement.styles.ts
@@ -4,7 +4,7 @@ const AnnouncementStyles = StyleSheet.create({
    // list (index.tsx)
    announcementListContainer:     { padding: 15, paddingBottom: 0 },
    announcementListInner:         { marginTop: 10 },
-   announcementListCard:          { borderRadius: 10, borderWidth: 1, padding: 12 },
+   announcementListCard:          { borderRadius: 12, borderWidth: 1, padding: 12 },
    announcementListCardHeader:    { marginBottom: 6 },
    announcementListTitleRow:      { flex: 1, gap: 8, marginRight: 8, flexDirection: 'row', alignItems: 'center' },
    announcementListIconBox:       { width: 28, height: 28, borderRadius: 8, alignItems: 'center', justifyContent: 'center' },
@@ -18,11 +18,11 @@ const AnnouncementStyles = StyleSheet.create({
 
    // detail ([id].tsx)
    announcementDetailContainer:         { padding: 15, paddingBottom: 50, gap: 12 },
-   announcementDetailCard:              { borderRadius: 10 },
+   announcementDetailCard:              { borderRadius: 12 },
    announcementDetailSkeletonGap:       { gap: 8 },
    announcementDetailSkeletonIconRow:   { gap: 10, marginBottom: 2 },
    announcementDetailTitleRow:          { gap: 10, marginBottom: 10 },
-   announcementDetailIconBox:           { width: 38, height: 38, borderRadius: 10 },
+   announcementDetailIconBox:           { width: 38, height: 38, borderRadius: 8 },
    announcementDetailTitleText:         { fontSize: 17, lineHeight: 24, flex: 1 },
    announcementDetailSectionLabelRow:   { marginBottom: 8, gap: 6 },
    announcementDetailFileCardPadding:   { padding: 10 },
@@ -33,7 +33,7 @@ const AnnouncementStyles = StyleSheet.create({
    announcementDetailGroupSeparator:    { marginTop: 12, paddingTop: 12, borderTopWidth: 1 },
    announcementDetailGroupLabel:        { marginBottom: 6 },
    announcementDetailDivisionRow:       { gap: 8, paddingVertical: 6 },
-   announcementDetailDivisionIconCircle: { width: 26, height: 26, borderRadius: 13, alignItems: 'center', justifyContent: 'center' },
+   announcementDetailDivisionIconCircle: { width: 26, height: 26, borderRadius: 100, alignItems: 'center', justifyContent: 'center' },
 });
 
 export default AnnouncementStyles;