diff --git a/pes_to_spec/model.py b/pes_to_spec/model.py
index b76700ba8685af4e1c6525f65f344162dfd8f8c2..726921e385cfc232fa03b7b359e4149d2cd814f4 100644
--- a/pes_to_spec/model.py
+++ b/pes_to_spec/model.py
@@ -60,7 +60,7 @@ def fwhm(x: np.ndarray, y: np.ndarray) -> float:
     right_idx = np.where(d < 0)[-1][-1]
     return x[right_idx] - x[left_idx]
 
-def deconv(y: np.ndarray, yhat: np.ndarray) -> Dict[str, Any]
+def deconv(y: np.ndarray, yhat: np.ndarray) -> Dict[str, Any]:
     """Given the grating spectrometer data and the virtual spectrometer data,
     calculate the deconvolution between them.
     """