diff --git a/.changeset/dockerignore-ascii-digit-class.md b/.changeset/dockerignore-ascii-digit-class.md
new file mode 100644
index 0000000000..27cef05799
--- /dev/null
+++ b/.changeset/dockerignore-ascii-digit-class.md
@@ -0,0 +1,5 @@
+---
+"@e2b/dockerfile-utils-python": patch
+---
+
+Keep bracket digit classes in Dockerignore patterns ASCII-only, matching Moby and the JavaScript utility. Non-ASCII decimal digits are no longer excluded by a pattern such as `[\d]`.
diff --git a/packages/dockerfile-utils-python/e2b_dockerfile_utils/dockerignore.py b/packages/dockerfile-utils-python/e2b_dockerfile_utils/dockerignore.py
index 18e6d7448f..9353ffd4f5 100644
--- a/packages/dockerfile-utils-python/e2b_dockerfile_utils/dockerignore.py
+++ b/packages/dockerfile-utils-python/e2b_dockerfile_utils/dockerignore.py
@@ -144,7 +144,7 @@ def _compile(pattern: str, backslash_is_escape: bool) -> Callable[[str], bool]:
         return lambda path: path.endswith(suffix) or (
             suffix.startswith("/") and path == suffix[1:]
         )
-    compiled = re.compile(regex + r"\Z")
+    compiled = re.compile(regex + r"\Z", flags=re.ASCII)
     return lambda path: compiled.match(path) is not None
 
 
diff --git a/packages/dockerfile-utils-python/tests/test_dockerignore.py b/packages/dockerfile-utils-python/tests/test_dockerignore.py
index 4bed4766a3..9902943d4a 100644
--- a/packages/dockerfile-utils-python/tests/test_dockerignore.py
+++ b/packages/dockerfile-utils-python/tests/test_dockerignore.py
@@ -72,3 +72,11 @@ def test_rejects_invalid_patterns_with_value_error():
         PatternMatcher(["[abc"])
     with pytest.raises(ValueError, match=r"Invalid ignore pattern '\[\\q\]'"):
         PatternMatcher(["[\\q]"])
+
+
+@pytest.mark.parametrize(
+    ("path", "excluded"),
+    [("5", True), ("\u0661", False), ("d", False)],
+)
+def test_digit_class_only_matches_ascii_digits(path, excluded):
+    assert PatternMatcher([r"[\d]"]).matches(path) is excluded