diff --git a/rqalpha/mod/rqalpha_mod_sys_analyser/plot/plot.py b/rqalpha/mod/rqalpha_mod_sys_analyser/plot/plot.py
index 55cbf5b7d..8347966ed 100644
--- a/rqalpha/mod/rqalpha_mod_sys_analyser/plot/plot.py
+++ b/rqalpha/mod/rqalpha_mod_sys_analyser/plot/plot.py
@@ -99,8 +99,8 @@ def _plot_spots_on_returns(self, ax, positions: Sequence[int], info: SpotInfo):
     def plot(self, ax: Axes):
         ax.get_xaxis().set_minor_locator(ticker.AutoMinorLocator())
         ax.get_yaxis().set_minor_locator(ticker.AutoMinorLocator())
-        ax.grid(b=True, which='minor', linewidth=.2)
-        ax.grid(b=True, which='major', linewidth=1)
+        ax.grid(visible=True, which='minor', linewidth=.2)
+        ax.grid(visible=True, which='major', linewidth=1)
         ax.patch.set_alpha(0.6)
 
         # plot lines
diff --git a/setup.py b/setup.py
index d7ccc6673..39c97c798 100644
--- a/setup.py
+++ b/setup.py
@@ -29,7 +29,7 @@
     'tabulate',
     'rqrisk >=1.0.5',
     'h5py',
-    'matplotlib >=2.2.0',
+    'matplotlib >=3.1.0',
     "openpyxl",
     "methodtools"
 ]