diff --git a/src/calibre/gui2/dialogs/metadata_bulk.ui b/src/calibre/gui2/dialogs/metadata_bulk.ui
index ae3445998b..1654ff8261 100644
--- a/src/calibre/gui2/dialogs/metadata_bulk.ui
+++ b/src/calibre/gui2/dialogs/metadata_bulk.ui
@@ -341,7 +341,7 @@ from the value in the box</string>
                 <number>1</number>
                </property>
                <property name="maximum">
-                <number>990000</number>
+                <number>99000000</number>
                </property>
                <property name="value">
                 <number>1</number>
diff --git a/src/calibre/gui2/dialogs/metadata_single.ui b/src/calibre/gui2/dialogs/metadata_single.ui
index 5bcf268aaa..ced5030f94 100644
--- a/src/calibre/gui2/dialogs/metadata_single.ui
+++ b/src/calibre/gui2/dialogs/metadata_single.ui
@@ -419,7 +419,7 @@ If the box is colored green, then text matches the individual author's sort stri
                      <string>Book </string>
                     </property>
                     <property name="maximum">
-                     <double>9999.989999999999782</double>
+                     <double>99999999.989999994635582</double>
                     </property>
                    </widget>
                   </item>
diff --git a/src/calibre/gui2/metadata/basic_widgets.py b/src/calibre/gui2/metadata/basic_widgets.py
index a135176daf..d5a8de7b67 100644
--- a/src/calibre/gui2/metadata/basic_widgets.py
+++ b/src/calibre/gui2/metadata/basic_widgets.py
@@ -351,7 +351,7 @@ class SeriesIndexEdit(QDoubleSpinBox):
         QDoubleSpinBox.__init__(self, parent)
         self.dialog = parent
         self.db = self.original_series_name = None
-        self.setMaximum(1000000)
+        self.setMaximum(10000000)
         self.series_edit = series_edit
         series_edit.currentIndexChanged.connect(self.enable)
         series_edit.editTextChanged.connect(self.enable)