diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0497ac3508..cc74f549ae 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,10 @@
 This document records all notable changes to [HTTPie](https://httpie.io).
 This project adheres to [Semantic Versioning](https://semver.org/).
 
+## [3.2.5-dev](https://github.com/httpie/cli/compare/3.2.4...master) (unreleased)
+
+- Fixed nested JSON keys that look like numbers but are not in canonical form (e.g. `007`, `1_000`, `+5`) being silently normalized instead of kept verbatim.
+
 ## [3.2.4](https://github.com/httpie/cli/compare/3.2.3...3.2.4) (2024-11-01)
 
 - Fix default certs loading and unpin `requests`. ([#1596](https://github.com/httpie/cli/issues/1596))
diff --git a/httpie/cli/nested_json/parse.py b/httpie/cli/nested_json/parse.py
index 323a22eef1..84f018fec2 100644
--- a/httpie/cli/nested_json/parse.py
+++ b/httpie/cli/nested_json/parse.py
@@ -138,7 +138,7 @@ def send_buffer() -> Iterator[Token]:
         kind = TokenKind.TEXT
         if not backslashes:
             for variation, kind in [
-                (int, TokenKind.NUMBER),
+                (parse_number, TokenKind.NUMBER),
                 (check_escaped_int, TokenKind.TEXT),
             ]:
                 try:
@@ -178,6 +178,22 @@ def can_advance() -> bool:
     yield from send_buffer()
 
 
+def parse_number(value: str) -> int:
+    """Parse ``value`` as an integer, but only when it is written in its
+    canonical form.
+
+    Unlike the built-in ``int()``, this rejects representations such as
+    ``007`` (leading zeros), ``1_000`` (digit-group separators), ``+5``
+    (explicit sign) or values padded with whitespace. Keeping those as plain
+    text preserves numeric-looking object keys verbatim instead of silently
+    normalizing them (e.g. ``007`` used to become ``7``).
+    """
+    number = int(value)
+    if value != str(number):
+        raise ValueError('Not a canonical integer')
+    return number
+
+
 def check_escaped_int(value: str) -> str:
     if not value.startswith(BACKSLASH):
         raise ValueError('Not an escaped int')
diff --git a/tests/test_json.py b/tests/test_json.py
index e758ebe7f4..04f4df6f82 100644
--- a/tests/test_json.py
+++ b/tests/test_json.py
@@ -439,6 +439,15 @@ def test_complex_json_arguments_with_non_json(httpbin, request_type, value):
                 '2': {'3': {'4': 5}},
             },
         ),
+        (
+            # Numeric-looking keys are only treated as array indexes when
+            # written in their canonical form. Non-canonical variants (leading
+            # zeros, digit separators, explicit signs, surrounding whitespace)
+            # are kept verbatim as object keys instead of being normalized by
+            # `int()` (e.g. `007` must not become `7`).
+            ['007=1', '00=2', '1_000=3', '+5=4', 'x[007]=6'],
+            {'007': '1', '00': '2', '1_000': '3', '+5': '4', 'x': {'007': '6'}},
+        ),
         (
             [':={"foo": {"bar": "baz"}}', 'top=val'],
             {'': {'foo': {'bar': 'baz'}}, 'top': 'val'},