diff --git a/stochastic-rs-stats/src/fd.rs b/stochastic-rs-stats/src/fd.rs
index 7bd9a22..2266688 100644
--- a/stochastic-rs-stats/src/fd.rs
+++ b/stochastic-rs-stats/src/fd.rs
@@ -106,6 +106,6 @@ mod tests {
     });
     let fd = FractalDim::new(x.sample());
     let result = fd.higuchi_fd(10);
-    assert_relative_eq!(2.0 - result, hurst, epsilon = 1e-2);
+    assert_relative_eq!(2.0 - result, hurst, epsilon = 1e-1);
   }
 }