diff --git a/resolve/re/response.py b/resolve/re/response.py
index 5b78dbd1b70c509d94da92311e66863de0bc7666..488d834d86629de56a8db00a5b5dfe33ac177bc1 100644
--- a/resolve/re/response.py
+++ b/resolve/re/response.py
@@ -19,19 +19,17 @@ def get_binbounds(coordinates):
 
 
 def convert_polarization(inp, inp_pol, out_pol):
-    mat_stokes_to_circular = jnp.array([[1,0,0,1],
-                                   [0,1,1j,0],
-                                   [0,1,-1j,0],
-                                   [1,0,0,-1]])
-    mat_stokes_to_linear = jnp.array([[1,1,0,0],
-                                   [1,-1,0,0],
-                                   [0,0,1,1j],
-                                   [0,0,1,-1j]])
-    if set(inp_pol) == {'I', 'Q', 'U', 'V'}:
-        if set(out_pol) == {'RR', 'RL', 'LR', 'LL'}:
-            return jnp.tensordot(mat_stokes_to_circular,inp, axes=([0],[0]))
-        elif set(out_pol) == {'XX', 'XY', 'YX', 'YY'}:
-            return jnp.tensordot(mat_stokes_to_linear,inp, axes=([0],[0]))
+    mat_stokes_to_circular = jnp.array(
+        [[1, 0, 0, 1], [0, 1, 1j, 0], [0, 1, -1j, 0], [1, 0, 0, -1]]
+    )
+    mat_stokes_to_linear = jnp.array(
+        [[1, 1, 0, 0], [1, -1, 0, 0], [0, 0, 1, 1j], [0, 0, 1, -1j]]
+    )
+    if set(inp_pol) == {"I", "Q", "U", "V"}:
+        if set(out_pol) == {"RR", "RL", "LR", "LL"}:
+            return jnp.tensordot(mat_stokes_to_circular, inp, axes=([0], [0]))
+        elif set(out_pol) == {"XX", "XY", "YX", "YY"}:
+            return jnp.tensordot(mat_stokes_to_linear, inp, axes=([0], [0]))
     elif inp_pol == ("I",):
         if out_pol == ("LL", "RR") or out_pol == ("XX", "YY"):
             new_shp = list(inp.shape)