diff --git a/ohmpi.py b/ohmpi.py
index f72f0f96637812b7628abb01e40d7ebaf804c464..a7b0fad8e6f5d07439812bd7592e6ad999b3b417 100644
--- a/ohmpi.py
+++ b/ohmpi.py
@@ -969,7 +969,7 @@ class OhmPi(object):
                 pinMN = 0 if polarity > 0 else 2  # noqa
 
                 # sampling for each stack at the end of the injection
-                sampling_interval = 10  # ms    # TODO: make this a config option
+                sampling_interval = 2  # ms    # TODO: make this a config option
                 self.nb_samples = int(injection_duration * 1000 // sampling_interval) + 1  # TODO: check this strategy
 
                 # full data for waveform