diff --git a/combo/public/templatetags/combo.py b/combo/public/templatetags/combo.py
index 95708625..d69f55e0 100644
--- a/combo/public/templatetags/combo.py
+++ b/combo/public/templatetags/combo.py
@@ -27,7 +27,6 @@ import django
 from django import template
 from django.core import signing
 from django.core.exceptions import PermissionDenied
-from django.core.serializers.json import DjangoJSONEncoder
 from django.template import VariableDoesNotExist
 
 try:
@@ -43,8 +42,6 @@ from django.template import Template, TemplateSyntaxError, defaultfilters
 from django.template.defaultfilters import stringfilter
 from django.utils import dateparse
 from django.utils.encoding import force_text
-from django.utils.html import format_html
-from django.utils.safestring import mark_safe
 from django.utils.timezone import is_naive, make_aware
 
 from combo.apps.dashboard.models import DashboardCell, Tile
@@ -652,27 +649,6 @@ def abs_(value):
     return decimal(abs(parse_decimal(value)))
 
 
-_json_script_escapes = {
-    ord('>'): '\\u003E',
-    ord('<'): '\\u003C',
-    ord('&'): '\\u0026',
-}
-
-
-@register.filter(is_safe=True)
-def json_script(value, element_id):
-    """
-    Escape all the HTML/XML special characters with their unicode escapes, so
-    value is safe to be output anywhere except for inside a tag attribute. Wrap
-    the escaped JSON in a script tag.
-    --
-    This is a backport from Django 2.1; it should be removed once Combo bumps
-    its minimal dependency to 2.1.
-    """
-    json_str = json.dumps(value, cls=DjangoJSONEncoder).translate(_json_script_escapes)
-    return format_html('<script id="{}" type="application/json">{}</script>', element_id, mark_safe(json_str))
-
-
 @register.filter(is_safe=False)
 def phonenumber_fr(value, separator=' '):
     DROMS = ('262', '508', '590', '594', '596')
diff --git a/tests/test_public_templatetags.py b/tests/test_public_templatetags.py
index 2d2515c8..76bbec86 100644
--- a/tests/test_public_templatetags.py
+++ b/tests/test_public_templatetags.py
@@ -854,14 +854,6 @@ def test_abs_templatetag():
     assert tmpl.render(Context({'value': None})) == '0'
 
 
-def test_json_script():
-    tmpl = Template('{{ plop|json_script:"toto" }}')
-    assert (
-        tmpl.render(Context({'plop': {'a': 'b'}}))
-        == '<script id="toto" type="application/json">{"a": "b"}</script>'
-    )
-
-
 def test_phonenumber_fr():
     t = Template('{{ number|phonenumber_fr }}')
     assert t.render(Context({'number': '01 23 45 67 89'})) == '01 23 45 67 89'