diff --git a/nw/gui/dialogs/export.py b/nw/gui/dialogs/export.py
index 57bc06ee..56e99369 100644
--- a/nw/gui/dialogs/export.py
+++ b/nw/gui/dialogs/export.py
@@ -411,11 +411,13 @@ class GuiExportMain(QWidget):
         self.guiChapters.setLayout(self.guiChaptersForm)
 
         self.chapterFormat = QLineEdit()
+        self.chapterFormat.setMaxLength(200)
         self.chapterFormat.setText(self.optState.getSetting("chFormat"))
         self.chapterFormat.setToolTip("Available formats: %num%, %numword%, %title%")
         self.chapterFormat.setMinimumWidth(250)
 
         self.unnumFormat = QLineEdit()
+        self.unnumFormat.setMaxLength(200)
         self.unnumFormat.setText(self.optState.getSetting("unFormat"))
         self.unnumFormat.setToolTip("Available formats: %title%")
         self.unnumFormat.setMinimumWidth(250)
@@ -431,11 +433,13 @@ class GuiExportMain(QWidget):
         self.guiScenes.setLayout(self.guiScenesForm)
 
         self.sceneFormat = QLineEdit()
+        self.sceneFormat.setMaxLength(200)
         self.sceneFormat.setText(self.optState.getSetting("scFormat"))
         self.sceneFormat.setToolTip("Available formats: %title%")
         self.sceneFormat.setMinimumWidth(100)
 
         self.sectionFormat = QLineEdit()
+        self.sectionFormat.setMaxLength(200)
         self.sectionFormat.setText(self.optState.getSetting("seFormat"))
         self.sectionFormat.setToolTip("Available formats: %title%")
         self.sectionFormat.setMinimumWidth(100)
diff --git a/nw/gui/dialogs/projecteditor.py b/nw/gui/dialogs/projecteditor.py
index 21aa7e9c..d848bc9a 100644
--- a/nw/gui/dialogs/projecteditor.py
+++ b/nw/gui/dialogs/projecteditor.py
@@ -126,6 +126,9 @@ class GuiProjectEditMain(QWidget):
         self.editAuthors = QPlainTextEdit()
         self.doBackup    = QCheckBox(self)
 
+        self.editName.setMaxLength(200)
+        self.editTitle.setMaxLength(200)
+
         self.mainForm.addRow("Working Title",  self.editName)
         self.mainForm.addRow("Book Title",     self.editTitle)
         self.mainForm.addRow("Book Authors",   self.editAuthors)
@@ -176,6 +179,7 @@ class GuiProjectEditStatus(QWidget):
             self._addItem(iName, iCol, iName, nUse)
 
         self.editName = QLineEdit()
+        self.editName.setMaxLength(40)
         self.editName.setEnabled(False)
         self.newButton  = QPushButton("New")
         self.delButton  = QPushButton("Delete")
@@ -351,7 +355,9 @@ class GuiProjectEditReplace(QWidget):
         self.delButton  = QPushButton(self.theTheme.getIcon("remove"),"")
 
         self.editKey.setEnabled(False)
+        self.editKey.setMaxLength(40)
         self.editValue.setEnabled(False)
+        self.editValue.setMaxLength(80)
 
         self.saveButton.clicked.connect(self._saveEntry)
         self.addButton.clicked.connect(self._addEntry)