diff --git a/accuracy_estimate/accuracy_estimate.py b/accuracy_estimate/accuracy_estimate.py
index 58915707fefd1adc51c0b1e56dbe11228e04215f..a03cad574fbb422132774c91b5a78f11a5a04a20 100644
--- a/accuracy_estimate/accuracy_estimate.py
+++ b/accuracy_estimate/accuracy_estimate.py
@@ -34,7 +34,7 @@ class AccuracyEstimate:
 
         x = df1['Count']
         y = df2['Mean']
-        yerr = df2['Variance']
+        yerr = np.sqrt(df2['Variance'])
 
         fig = plt.figure()
         ax = fig.add_subplot(1, 1, 1)