diff --git a/src/dotenv/parser.py b/src/dotenv/parser.py
index eb100b47..66773604 100644
--- a/src/dotenv/parser.py
+++ b/src/dotenv/parser.py
@@ -68,7 +68,7 @@ class Error(Exception):
 
 class Reader:
     def __init__(self, stream: IO[str]) -> None:
-        self.string = stream.read()
+        self.string = stream.read().removeprefix("\ufeff")
         self.position = Position.start()
         self.mark = Position.start()
 
diff --git a/tests/test_parser.py b/tests/test_parser.py
index 43386e5a..4ec5a5af 100644
--- a/tests/test_parser.py
+++ b/tests/test_parser.py
@@ -545,6 +545,35 @@
                 ),
             ],
         ),
+        # UTF-8 BOM at the start of the file should be stripped
+        (
+            "\ufeffa=b",
+            [
+                Binding(
+                    key="a",
+                    value="b",
+                    original=Original(string="a=b", line=1),
+                    error=False,
+                )
+            ],
+        ),
+        (
+            "\ufeffa=b\nc=d",
+            [
+                Binding(
+                    key="a",
+                    value="b",
+                    original=Original(string="a=b\n", line=1),
+                    error=False,
+                ),
+                Binding(
+                    key="c",
+                    value="d",
+                    original=Original(string="c=d", line=2),
+                    error=False,
+                ),
+            ],
+        ),
     ],
 )
 def test_parse_stream(test_input, expected):