diff --git a/src/extensions/Bolt11Extension.ts b/src/extensions/Bolt11Extension.ts
index 47f3817..ae1d70d 100644
--- a/src/extensions/Bolt11Extension.ts
+++ b/src/extensions/Bolt11Extension.ts
@@ -5,7 +5,7 @@ import { decode } from 'light-bolt11-decoder'
 import type { MarkdownSerializerState } from 'prosemirror-markdown'
 import { createPasteRuleMatch } from '../helpers/utils'
 
-const LNBC_REGEX = /(lnbc[0-9a-z]{10,})/g
+const LNBC_REGEX = /(?:^|\s)(lnbc[0-9a-z]{10,})/g
 
 declare module '@tiptap/core' {
   interface Commands<ReturnType> {
diff --git a/src/extensions/NAddrExtension.ts b/src/extensions/NAddrExtension.ts
index 9424014..5eacf02 100644
--- a/src/extensions/NAddrExtension.ts
+++ b/src/extensions/NAddrExtension.ts
@@ -5,7 +5,7 @@ import type { AddressPointer } from 'nostr-tools/nip19'
 import type { MarkdownSerializerState } from 'prosemirror-markdown'
 import { createPasteRuleMatch } from '../helpers/utils'
 
-export const NADDR_REGEX = /(nostr:)?(naddr1[0-9a-z]+)/g
+export const NADDR_REGEX = /(?:^|\s)(nostr:)?(naddr1[0-9a-z]+)/g
 
 export interface NAddrAttributes {
   naddr: string
diff --git a/src/extensions/NEventExtension.ts b/src/extensions/NEventExtension.ts
index a3df039..80150e6 100644
--- a/src/extensions/NEventExtension.ts
+++ b/src/extensions/NEventExtension.ts
@@ -5,9 +5,9 @@ import type { EventPointer } from 'nostr-tools/nip19'
 import type { MarkdownSerializerState } from 'prosemirror-markdown'
 import { createPasteRuleMatch } from '../helpers/utils'
 
-export const NOTE_REGEX = /(nostr:)?(note1[0-9a-z]+)/g
+export const NOTE_REGEX = /(?:^|\s)(nostr:)?(note1[0-9a-z]+)/g
 
-export const NEVENT_REGEX = /(nostr:)?(nevent1[0-9a-z]+)/g
+export const NEVENT_REGEX = /(?:^|\s)(nostr:)?(nevent1[0-9a-z]+)/g
 
 export interface NEventAttributes {
   nevent: string
diff --git a/src/extensions/NProfileExtension.ts b/src/extensions/NProfileExtension.ts
index 8923275..4278f02 100644
--- a/src/extensions/NProfileExtension.ts
+++ b/src/extensions/NProfileExtension.ts
@@ -5,9 +5,9 @@ import type { ProfilePointer } from 'nostr-tools/nip19'
 import type { MarkdownSerializerState } from 'prosemirror-markdown'
 import { createPasteRuleMatch } from '../helpers/utils'
 
-export const NPUB_REGEX = /(nostr:)?(npub1[0-9a-z]+)/g
+export const NPUB_REGEX = /(?:^|\s)(nostr:)?(npub1[0-9a-z]+)/g
 
-export const NPROFILE_REGEX = /(nostr:)?(nprofile1[0-9a-z]+)/g
+export const NPROFILE_REGEX = /(?:^|\s)(nostr:)?(nprofile1[0-9a-z]+)/g
 
 export type NProfileAttributes = {
   nprofile: string