diff --git a/optirustic-py/Cargo.lock b/optirustic-py/Cargo.lock
index 266d099..3ddb7e4 100644
--- a/optirustic-py/Cargo.lock
+++ b/optirustic-py/Cargo.lock
@@ -311,14 +311,6 @@ dependencies = [
  "cc",
 ]
 
-[[package]]
-name = "hv-wfg-sys"
-version = "0.1.1"
-dependencies = [
- "bindgen",
- "cc",
-]
-
 [[package]]
 name = "iana-time-zone"
 version = "0.1.60"
@@ -557,12 +549,11 @@ checksum = "3fdb12b2476b595f9358c5161aa467c2438859caa136dec86c26fdd2efe17b92"
 
 [[package]]
 name = "optirustic"
-version = "0.5.0"
+version = "0.6.0"
 dependencies = [
  "chrono",
  "env_logger",
  "hv-fonseca-et-al-2006-sys",
- "hv-wfg-sys",
  "log",
  "nalgebra",
  "optirustic-macros",
diff --git a/src/metrics/hypervolume.rs b/src/metrics/hypervolume.rs
index ef2134c..ac86eb1 100644
--- a/src/metrics/hypervolume.rs
+++ b/src/metrics/hypervolume.rs
@@ -569,7 +569,7 @@ mod test {
         let data = NSGA2::read_json_file(&file).unwrap();
 
         let found = HyperVolume::estimate_reference_point_from_file(&data, None).unwrap();
-        let expected = [0.999, 1.00];
+        let expected = [0.9999, 1.0000];
         assert_approx_array_eq(&found, &expected, Some(0.001));
     }
 }