diff --git a/quanto/library/ext/README.md b/quanto/library/ext/README.md
index 8009519c..f2b59a97 100644
--- a/quanto/library/ext/README.md
+++ b/quanto/library/ext/README.md
@@ -14,7 +14,7 @@ The operations are defined in `library/ops.py`.
 
 To provide an implementation for specific device types, use the following syntax:
 
-```
+```python
 @torch.library.impl("quanto_ext::unpack", ["CPU", "CUDA"])
 def unpack(packed: torch.Tensor, bits: int) -> torch.Tensor:
     return ext().unpack(t, bits)
diff --git a/quanto/library/python/README.md b/quanto/library/python/README.md
index bc270fc0..8c33eda0 100644
--- a/quanto/library/python/README.md
+++ b/quanto/library/python/README.md
@@ -8,7 +8,7 @@ The operations are defined in `library/ops.py`.
 
 To provide an implementation for an operation, use the following syntax:
 
-```
+```python
 @torch.library.impl("quanto_py::unpack", "default")
 def unpack(packed: torch.Tensor, bits: int) -> torch.Tensor:
     ...