diff --git a/maintenance.py b/maintenance.py
index 6d46342..ff42209 100644
--- a/maintenance.py
+++ b/maintenance.py
@@ -388,6 +388,11 @@ class Maintenance(Workflow, ModelSQL, ModelView):
                              vert=True,  # vertical box alignment
                              patch_artist=True,  # fill with color
                              labels=labels)  # will be used to label x-ticks
+        top = 0.3
+        bottom = -0.3
+        ax1.set_ylim(bottom, top)
+        ax1.set_yticks([-0.30,-0.25,-0.20,-0.15,-0.10,-0.05,0.0,0.05,0.10,0.15,0.20,0.25,0.30])
+
         ax1.set_title('Error[D]')
         # adding horizontal grid lines
         for ax in [ax1]:
diff --git a/report/.~lock.Contract.fodt# b/report/.~lock.Contract.fodt#
deleted file mode 100644
index 0b4cb2f..0000000
--- a/report/.~lock.Contract.fodt#
+++ /dev/null
@@ -1 +0,0 @@
-,raskolnikov,rodia-pc,08.11.2022 14:43,file:///home/raskolnikov/.config/libreoffice/4;
\ No newline at end of file