diff --git a/electrode_check.py b/electrode_check.py
index 9d743df..ac4ebcd 100644
--- a/electrode_check.py
+++ b/electrode_check.py
@@ -362,7 +362,7 @@ def main():
                     ylim = (yspan[0] - np.abs(np.diff(yspan)) * 0.2, yspan[1] + np.abs(np.diff(yspan)) * 0.2)
 
                     for ch in channel_array:
-                        h, = Plot.axs[ch].plot(np.arange(250)[:len(channel_data[ch])] / rate, channel_data[ch] / 1000, color='k')
+                        h, = Plot.axs[ch].plot(np.arange(250)[:len(channel_data[ch])] / rate, np.array(channel_data[ch]) / 1000, color='k')
                         Plot.axs[ch].set_ylim(ylim)
                         Plot.channel_handle.append(h)
 
@@ -373,7 +373,7 @@ def main():
                     yspan = [np.min(channel_data[power_channel]), np.max(channel_data[power_channel])]
                     ylim = [yspan[0] - np.abs(np.diff(yspan)) * 0.2, yspan[1] + np.abs(np.diff(yspan)) * 0.2]
                     for ch in channel_array:
-                        Plot.channel_handle[ch].set_data(np.arange(250)[:len(channel_data[ch])] / rate, channel_data[ch] / 1000)
+                        Plot.channel_handle[ch].set_data(np.arange(250)[:len(channel_data[ch])] / rate, np.array(channel_data[ch]) / 1000)
                         Plot.axs[ch].set_ylim(ylim)
                     Plot.fig.canvas.draw()