diff --git a/bin/LiCSBAS_plot_ts.py b/bin/LiCSBAS_plot_ts.py
index 53e221c..7cb2853 100755
--- a/bin/LiCSBAS_plot_ts.py
+++ b/bin/LiCSBAS_plot_ts.py
@@ -1210,8 +1210,9 @@ def printcoords(event):
         axts.scatter(imdates_dt, np.zeros(len(imdates_dt)), c='b', alpha=0.6)
         axts_corr.scatter(imdates_dt, np.zeros(len(imdates_dt)), c='b', alpha=0.6)
                 
-        loc_ts = axts.xaxis.set_major_locator(mdates.AutoDateLocator())
-        try:  # Only support from Matplotlib 3.1
+        loc_ts = mdates.AutoDateLocator()
+        axts.xaxis.set_major_locator(loc_ts)
+        try:
             axts.xaxis.set_major_formatter(mdates.ConciseDateFormatter(loc_ts))
         except:
             axts.xaxis.set_major_formatter(mdates.DateFormatter('%Y/%m/%d'))