diff --git a/mflike/mflike.py b/mflike/mflike.py
index 425e81c..56af65a 100644
--- a/mflike/mflike.py
+++ b/mflike/mflike.py
@@ -110,7 +110,7 @@ def get_requirements(self):
         return dict(Cl={k: max(c, self.lmax_theory + 1) for k, c in self.lcuts.items()})
 
     def logp(self, **params_values):
-        cl = self.theory.get_Cl(ell_factor=True)
+        cl = self.provider.get_Cl(ell_factor=True)
         params_values_nocosmo = {
             k: params_values[k] for k in self.expected_params_fg + self.expected_params_nuis
         }
diff --git a/setup.py b/setup.py
index 35d0ebb..fdd593e 100644
--- a/setup.py
+++ b/setup.py
@@ -31,7 +31,7 @@
     install_requires=[
         "fgspectra>=1.1.0",
         "syslibrary>=0.1.0",
-        "cobaya>=3.3.0",
+        "cobaya>=3.4.1",
         "sacc>=0.9.0",
     ],
     package_data={"mflike": ["MFLike.yaml"]},