diff --git a/pipeline/utils.py b/pipeline/utils.py
index 914d909..ee4ec19 100644
--- a/pipeline/utils.py
+++ b/pipeline/utils.py
@@ -181,7 +181,7 @@ class Interval():
             self.start += new_start
         else:
             self.start = new_start
-        self.duration = self.end - self.start
+        self.duration = round((self.end - self.start), self.DEFAUT_PRECISION)
 
     def move_end(self, new_end: float | int, relative: bool = False):
         """Update end time of Interval, keeping start time constant (& so modify duration)"""
@@ -189,7 +189,7 @@ class Interval():
             self.end += new_end
         else:
             self.end = new_end
-        self.duration = self.end - self.start
+        self.duration = round((self.end - self.start), self.DEFAUT_PRECISION)
 
     def update_duration(self, new_duration: float | int, relative: bool = False):
         """Update duration of Interval, keeping start time constant (& so modify end time)"""