diff --git a/maud/stan/functions.stan b/maud/stan/functions.stan
index 5e1f8ffc..74566178 100644
--- a/maud/stan/functions.stan
+++ b/maud/stan/functions.stan
@@ -242,7 +242,7 @@ functions {
       }
       out[f] = inv(1
                    + tc_edge
-                     * (free_enzyme_ratio[edge_to_enzyme[f]] * Q_num / Q_denom) ^ subunits[edge_to_enzyme[f]]);
+                     * (free_enzyme_ratio[f] * Q_num / Q_denom) ^ subunits[edge_to_enzyme[f]]);
     }
     return out;
   }
@@ -680,7 +680,7 @@ functions {
       out[f] = 1
                / (1
                   + tc_edge
-                    * (free_enzyme_ratio[edge_to_enzyme[f]] * Q_num / Q_denom) ^ subunits[edge_to_enzyme[f]]);
+                    * (free_enzyme_ratio[f] * Q_num / Q_denom) ^ subunits[edge_to_enzyme[f]]);
     }
     return out;
   }
diff --git a/pyproject.toml b/pyproject.toml
index 9429d75c..78734d3f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -184,5 +184,5 @@ legacy_tox_ini = """
         safety
     commands=
         pip install --upgrade pip
-        safety check -i 44715 -i 51549
+        safety check -i 44715 -i 51549 -i 70612
 """