diff --git a/pre_commit_hooks/pretty_format_json.py b/pre_commit_hooks/pretty_format_json.py
index 627a11cc..5c866e3b 100644
--- a/pre_commit_hooks/pretty_format_json.py
+++ b/pre_commit_hooks/pretty_format_json.py
@@ -1,12 +1,13 @@
 from __future__ import annotations
 
 import argparse
-import json
 import sys
 from difflib import unified_diff
 from typing import Mapping
 from typing import Sequence
 
+import simplejson as json
+
 
 def _get_pretty_format(
         contents: str,
@@ -23,7 +24,7 @@ def pairs_first(pairs: Sequence[tuple[str, str]]) -> Mapping[str, str]:
             after.sort()
         return dict(before + after)
     json_pretty = json.dumps(
-        json.loads(contents, object_pairs_hook=pairs_first),
+        json.loads(contents, object_pairs_hook=pairs_first, use_decimal=True),
         indent=indent,
         ensure_ascii=ensure_ascii,
     )
diff --git a/testing/resources/high_precision_numbers.json b/testing/resources/high_precision_numbers.json
new file mode 100644
index 00000000..740fef71
--- /dev/null
+++ b/testing/resources/high_precision_numbers.json
@@ -0,0 +1,3 @@
+{
+  "foo": 4.4257052820783003
+}
diff --git a/tests/pretty_format_json_test.py b/tests/pretty_format_json_test.py
index 5ded724a..16a3328a 100644
--- a/tests/pretty_format_json_test.py
+++ b/tests/pretty_format_json_test.py
@@ -23,6 +23,8 @@ def test_parse_num_to_int():
         ('unsorted_pretty_formatted_json.json', 1),
         ('non_ascii_pretty_formatted_json.json', 1),
         ('pretty_formatted_json.json', 0),
+        # numbers with high precision should not be modified.
+        ('high_precision_numbers.json', 0),
     ),
 )
 def test_main(filename, expected_retval):