diff --git a/src/HtmlUtils.js b/src/HtmlUtils.js
index 8fae992268..68a83bfd35 100644
--- a/src/HtmlUtils.js
+++ b/src/HtmlUtils.js
@@ -50,7 +50,7 @@ const ZWJ_REGEX = new RegExp("\u200D|\u2003", "g");
 // Regex pattern for whitespace characters
 const WHITESPACE_REGEX = new RegExp("\\s", "g");
 
-const BIGEMOJI_REGEX = new RegExp(`^(${EMOJIBASE_REGEX})+$`, "i");
+const BIGEMOJI_REGEX = new RegExp(`^(${EMOJIBASE_REGEX.source})+$`, 'i');
 
 const COLOR_REGEX = /^#[0-9a-fA-F]{6}$/;
 
diff --git a/src/autocomplete/EmojiProvider.js b/src/autocomplete/EmojiProvider.js
index 95654e403d..c90343ca18 100644
--- a/src/autocomplete/EmojiProvider.js
+++ b/src/autocomplete/EmojiProvider.js
@@ -51,11 +51,11 @@ const CATEGORY_ORDER = [
 // (^|\s|(emojiUnicode)) to make sure we're either at the start of the string or there's a
 // whitespace character or an emoji before the emoji. The reason for unicodeRegexp is
 // that we need to support inputting multiple emoji with no space between them.
-const EMOJI_REGEX = new RegExp('(?:^|\\s|' + UNICODE_REGEX + ')(' + EMOTICON_REGEX + '|:[+-\\w]*:?)$', 'g');
+const EMOJI_REGEX = new RegExp('(?:^|\\s|' + UNICODE_REGEX.source + ')(' + EMOTICON_REGEX.source + '|:[+-\\w]*:?)$', 'g');
 
 // We also need to match the non-zero-length prefixes to remove them from the final match,
 // and update the range so that we don't replace the whitespace or the previous emoji.
-const MATCH_PREFIX_REGEX = new RegExp('(\\s|' + UNICODE_REGEX + ')');
+const MATCH_PREFIX_REGEX = new RegExp('(\\s|' + UNICODE_REGEX.source + ')');
 
 const EMOJI_SHORTNAMES = Object.keys(EmojiData).map((key) => EmojiData[key]).sort(
     (a, b) => {