diff --git a/nodejs/helper.js b/nodejs/helper.js
index 84b2aea..12faf7a 100644
--- a/nodejs/helper.js
+++ b/nodejs/helper.js
@@ -30,10 +30,10 @@ class UnicodeProcessor {
             '—': '-',
             '¯': ' ',
             '_': ' ',
-            '"': '"',
-            '"': '"',
-            '\u2018': "'",  // left single quote
-            '\u2019': "'",  // right single quote
+            '\u201C': '"',  // left double quote "
+            '\u201D': '"',  // right double quote "
+            '\u2018': "'",  // left single quote '
+            '\u2019': "'",  // right single quote '
             '´': "'",
             '`': "'",
             '[': ' ',
diff --git a/py/helper.py b/py/helper.py
index 9a210d6..cb9f897 100644
--- a/py/helper.py
+++ b/py/helper.py
@@ -47,10 +47,10 @@ class UnicodeProcessor:
             "—": "-",
             "¯": " ",
             "_": " ",
-            "“": '"',
-            "”": '"',
-            "‘": "'",
-            "’": "'",
+            "\u201C": '"',  # left double quote "
+            "\u201D": '"',  # right double quote "
+            "\u2018": "'",  # left single quote '
+            "\u2019": "'",  # right single quote '
             "´": "'",
             "`": "'",
             "[": " ",
diff --git a/web/helper.js b/web/helper.js
index 2022866..e62dd6b 100644
--- a/web/helper.js
+++ b/web/helper.js
@@ -44,10 +44,10 @@ export class UnicodeProcessor {
             '—': '-',
             '¯': ' ',
             '_': ' ',
-            '"': '"',
-            '"': '"',
-            '\u2018': "'",  // left single quote
-            '\u2019': "'",  // right single quote
+            '\u201C': '"',  // left double quote "
+            '\u201D': '"',  // right double quote "
+            '\u2018': "'",  // left single quote '
+            '\u2019': "'",  // right single quote '
             '´': "'",
             '`': "'",
             '[': ' ',