diff --git a/vidaug/augmentors/temporal.py b/vidaug/augmentors/temporal.py
index 606e0ca..592da11 100644
--- a/vidaug/augmentors/temporal.py
+++ b/vidaug/augmentors/temporal.py
@@ -130,7 +130,7 @@ def __init__(self , ratio=1.0):
         self.ratio = ratio
 
     def __call__(self, clip):
-        nb_return_frame = np.floor(self.ratio * len(clip))
+        nb_return_frame = int(np.floor(self.ratio * len(clip)))
         return_ind = [int(i) for i in np.linspace(1, len(clip), num=nb_return_frame)]
 
         return [clip[i-1] for i in return_ind]
@@ -150,7 +150,7 @@ def __init__(self , ratio=1.0):
         self.ratio = ratio
 
     def __call__(self, clip):
-        nb_return_frame = np.floor(self.ratio * len(clip))
+        nb_return_frame = int(np.floor(self.ratio * len(clip)))
         return_ind = [int(i) for i in np.linspace(1, len(clip), num=nb_return_frame)]
 
         return [clip[i-1] for i in return_ind]