diff --git a/autopeptideml/data/h_param_search/linreg_reg.yml b/autopeptideml/data/h_param_search/linreg_reg.yml
new file mode 100644
index 0000000..72f911d
--- /dev/null
+++ b/autopeptideml/data/h_param_search/linreg_reg.yml
@@ -0,0 +1,3 @@
+tol:
+  type: fixed
+  value: 1e-4
diff --git a/autopeptideml/reps/fps.py b/autopeptideml/reps/fps.py
index 519e328..82ef750 100644
--- a/autopeptideml/reps/fps.py
+++ b/autopeptideml/reps/fps.py
@@ -76,8 +76,8 @@ def __init__(self, rep: str, nbits: int, radius: int):
         :rtype: None
         """
         super().__init__(rep, nbits=nbits, radius=radius)
-        self.nbits = nbits
-        self.radius = radius
+        self.nbits = nbits if isinstance(nbits, int) else int(nbits)
+        self.radius = radius if isinstance(radius, int) else int(radius)
         self.name = f'{self.engine}-{rep}-{self.nbits}-{self.radius}'
         self.count = 'count' in rep
         if self.count: