diff --git a/src/neuro_flow/expr.py b/src/neuro_flow/expr.py
index 520d754b..fa0d9658 100644
--- a/src/neuro_flow/expr.py
+++ b/src/neuro_flow/expr.py
@@ -292,6 +292,8 @@ async def hash_files_relative(ctx: CallCtx, root: LocalPath, *patterns: str) ->
             # resolve() restores the case.
             relative_fname = fname.resolve().relative_to(root.resolve()).as_posix()
             hasher.update(relative_fname.encode("utf-8"))
+            if not fname.is_file():
+                continue
             with fname.open("rb", buffering=0) as stream:
                 read = stream.readinto(buffer)
                 while read:
diff --git a/tests/unit/hash_files/requirements/.hidden-dir/something.txt b/tests/unit/hash_files/requirements/.hidden-dir/something.txt
new file mode 100644
index 00000000..19f0805d
--- /dev/null
+++ b/tests/unit/hash_files/requirements/.hidden-dir/something.txt
@@ -0,0 +1 @@
+qwerty
diff --git a/tests/unit/test_functions.py b/tests/unit/test_functions.py
index 567df315..d9678335 100644
--- a/tests/unit/test_functions.py
+++ b/tests/unit/test_functions.py
@@ -128,10 +128,10 @@ async def test_fmt(client: Client) -> None:
 
 
 async def test_hash_files(client: Client) -> None:
-    expr = StrExpr(POS, POS, "${{ hash_files('Dockerfile', 'requirements/*.txt') }}")
+    expr = StrExpr(POS, POS, "${{ hash_files('Dockerfile', 'requirements/**/*') }}")
     folder = LocalPath(__file__).parent / "hash_files"
     ret = await expr.eval(Root({"flow": {"workspace": folder}}, client))
-    assert ret == "081fde04651e1184890a0470501bff3db8e0014260224e07acf5688e70e0edbe"
+    assert ret == "a8174f2c445c954da64b20abbd4fce62e094cd95ba7344c13fba79f5037bcbe2"
 
 
 async def test_lower(client: Client) -> None: