diff --git a/impl/utils/plot_amp_phase.py b/impl/utils/plot_amp_phase.py
index a70a40d..cbc2af5 100755
--- a/impl/utils/plot_amp_phase.py
+++ b/impl/utils/plot_amp_phase.py
@@ -17,7 +17,7 @@ with open(sys.argv[1], 'rb') as infile:
     t = np.arange(0, T*data.size, T)
 
     amp = np.absolute(data)
-    phase = np.angle(data)
+    phase = np.unwrap(np.angle(data))
 
     pp.plot(t, amp, 'r-')
     pp.legend(['Amplitude'])
diff --git a/impl/utils/plot_spectrum_loop.py b/impl/utils/plot_spectrum_loop.py
index fd82924..aba9ff4 100755
--- a/impl/utils/plot_spectrum_loop.py
+++ b/impl/utils/plot_spectrum_loop.py
@@ -35,8 +35,11 @@ ax.legend(['Spectrum'])
 ax.set_xlabel('Frequency [Hz]')
 
 def update(*args):
-    spec, f = load_data()
-    line.set_ydata(spec)
+    try:
+        spec, f = load_data()
+        line.set_ydata(spec)
+    except Exception as e:
+        print(e)
 
     return [line]