diff --git a/MacPass.xcodeproj/project.pbxproj b/MacPass.xcodeproj/project.pbxproj
index b3649612..f29367c7 100644
--- a/MacPass.xcodeproj/project.pbxproj
+++ b/MacPass.xcodeproj/project.pbxproj
@@ -859,12 +859,12 @@
 				4C10412B178CDD44001B5239 /* NSDate+Humanized.m */,
 				4CC6DB7817D23719002C6091 /* KPKNode+IconImage.h */,
 				4CC6DB7917D23719002C6091 /* KPKNode+IconImage.m */,
+				4C32B0E51A1D4436007E12F1 /* KPKFormat+MPUTIDetection.h */,
+				4C32B0E61A1D4436007E12F1 /* KPKFormat+MPUTIDetection.m */,
 				4CEED1C417D7BD0E007180F1 /* NSError+Messages.h */,
 				4CEED1C517D7BD0E007180F1 /* NSError+Messages.m */,
 				4C77C83F18E240E000D1C42B /* DDHotKey+MacPassAdditions.h */,
 				4C77C84018E240E000D1C42B /* DDHotKey+MacPassAdditions.m */,
-				4C32B0E51A1D4436007E12F1 /* KPKFormat+MPUTIDetection.h */,
-				4C32B0E61A1D4436007E12F1 /* KPKFormat+MPUTIDetection.m */,
 				4C5807761C64F67000E7171F /* NSString+MPHash.h */,
 				4C5807771C64F67000E7171F /* NSString+MPHash.m */,
 			);
diff --git a/MacPass/Base.lproj/InspectorView.xib b/MacPass/Base.lproj/InspectorView.xib
index ba64e555..961385e0 100644
--- a/MacPass/Base.lproj/InspectorView.xib
+++ b/MacPass/Base.lproj/InspectorView.xib
@@ -8,11 +8,12 @@
         <customObject id="-2" userLabel="File's Owner" customClass="MPInspectorViewController">
             <connections>
                 <outlet property="bottomBar" destination="2930" id="2995"/>
-                <outlet property="editButton" destination="3109" id="3122"/>
+                <outlet property="discardChangesButton" destination="hfJ-b8-tQJ" id="CCz-S9-SiC"/>
                 <outlet property="itemImageView" destination="2998" id="3024"/>
                 <outlet property="itemNameTextField" destination="3013" id="3025"/>
                 <outlet property="noSelectionInfo" destination="2985" id="2993"/>
                 <outlet property="notesTextView" destination="g24-gQ-foD" id="pcU-EQ-Vgn"/>
+                <outlet property="saveChangesButton" destination="lje-Eh-VCc" id="JK1-gy-w3R"/>
                 <outlet property="splitView" destination="3145" id="lyG-RH-yu4"/>
                 <outlet property="tabView" destination="2895" id="2994"/>
                 <outlet property="view" destination="2894" id="2976"/>
@@ -26,9 +27,16 @@
                 <customView translatesAutoresizingMaskIntoConstraints="NO" id="2930" customClass="HNHUIGradientView">
                     <rect key="frame" x="0.0" y="0.0" width="278" height="30"/>
                     <subviews>
-                        <button verticalHuggingPriority="750" misplaced="YES" translatesAutoresizingMaskIntoConstraints="NO" id="3109">
-                            <rect key="frame" x="219" y="2" width="39" height="25"/>
-                            <buttonCell key="cell" type="roundTextured" title="Edit" bezelStyle="texturedRounded" imagePosition="left" alignment="center" state="on" borderStyle="border" imageScaling="proportionallyDown" inset="2" id="3110">
+                        <button hidden="YES" verticalHuggingPriority="750" translatesAutoresizingMaskIntoConstraints="NO" id="lje-Eh-VCc">
+                            <rect key="frame" x="194" y="-2" width="70" height="32"/>
+                            <buttonCell key="cell" type="push" title="Save" bezelStyle="rounded" alignment="center" borderStyle="border" imageScaling="proportionallyDown" inset="2" id="15U-vA-2Dj">
+                                <behavior key="behavior" pushIn="YES" lightByBackground="YES" lightByGray="YES"/>
+                                <font key="font" metaFont="system"/>
+                            </buttonCell>
+                        </button>
+                        <button hidden="YES" verticalHuggingPriority="750" translatesAutoresizingMaskIntoConstraints="NO" id="hfJ-b8-tQJ">
+                            <rect key="frame" x="107" y="-2" width="87" height="32"/>
+                            <buttonCell key="cell" type="push" title="Discard" bezelStyle="rounded" alignment="center" borderStyle="border" imageScaling="proportionallyDown" inset="2" id="bQO-6W-0DC">
                                 <behavior key="behavior" pushIn="YES" lightByBackground="YES" lightByGray="YES"/>
                                 <font key="font" metaFont="system"/>
                             </buttonCell>
@@ -36,8 +44,13 @@
                     </subviews>
                     <constraints>
                         <constraint firstAttribute="height" constant="30" id="2949"/>
-                        <constraint firstAttribute="trailing" secondItem="3109" secondAttribute="trailing" constant="20" symbolic="YES" id="3138"/>
-                        <constraint firstItem="3109" firstAttribute="centerY" secondItem="2930" secondAttribute="centerY" id="3139"/>
+                        <constraint firstAttribute="bottom" secondItem="hfJ-b8-tQJ" secondAttribute="bottom" constant="5" id="98h-mh-kLI"/>
+                        <constraint firstItem="hfJ-b8-tQJ" firstAttribute="top" secondItem="2930" secondAttribute="top" constant="4" id="KJY-bS-IEo"/>
+                        <constraint firstAttribute="trailing" secondItem="lje-Eh-VCc" secondAttribute="trailing" constant="20" symbolic="YES" id="ctS-Ss-3p5"/>
+                        <constraint firstItem="lje-Eh-VCc" firstAttribute="leading" secondItem="hfJ-b8-tQJ" secondAttribute="trailing" constant="12" symbolic="YES" id="dqP-vX-v2w"/>
+                        <constraint firstItem="hfJ-b8-tQJ" firstAttribute="leading" relation="greaterThanOrEqual" secondItem="2930" secondAttribute="leading" constant="20" symbolic="YES" id="eHL-y7-iiE"/>
+                        <constraint firstAttribute="bottom" secondItem="lje-Eh-VCc" secondAttribute="bottom" constant="5" id="jQ2-v5-1GZ"/>
+                        <constraint firstItem="lje-Eh-VCc" firstAttribute="top" secondItem="2930" secondAttribute="top" constant="4" id="t64-P5-H3N"/>
                     </constraints>
                 </customView>
                 <imageView translatesAutoresizingMaskIntoConstraints="NO" id="2998" customClass="MPPopupImageView">
@@ -95,8 +108,8 @@
                                                 <rect key="frame" x="0.0" y="0.0" width="278" height="370"/>
                                                 <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
                                                 <subviews>
-                                                    <textField verticalHuggingPriority="750" misplaced="YES" translatesAutoresizingMaskIntoConstraints="NO" id="2985">
-                                                        <rect key="frame" x="80" y="194" width="119" height="24"/>
+                                                    <textField verticalHuggingPriority="750" translatesAutoresizingMaskIntoConstraints="NO" id="2985">
+                                                        <rect key="frame" x="81" y="194" width="118" height="24"/>
                                                         <textFieldCell key="cell" scrollable="YES" lineBreakMode="clipping" sendsActionOnEndEditing="YES" title="No Selection" id="2986">
                                                             <font key="font" metaFont="system" size="20"/>
                                                             <color key="textColor" name="controlShadowColor" catalog="System" colorSpace="catalog"/>
@@ -125,8 +138,8 @@
                             <rect key="frame" x="0.0" y="371" width="278" height="211"/>
                             <autoresizingMask key="autoresizingMask"/>
                             <subviews>
-                                <textField horizontalHuggingPriority="251" verticalHuggingPriority="750" misplaced="YES" translatesAutoresizingMaskIntoConstraints="NO" id="PzR-P9-3al">
-                                    <rect key="frame" x="18" y="192" width="36" height="14"/>
+                                <textField horizontalHuggingPriority="251" verticalHuggingPriority="750" translatesAutoresizingMaskIntoConstraints="NO" id="PzR-P9-3al">
+                                    <rect key="frame" x="18" y="192" width="35" height="14"/>
                                     <textFieldCell key="cell" controlSize="small" scrollable="YES" lineBreakMode="clipping" sendsActionOnEndEditing="YES" title="Notes" id="hwn-UY-9Cr">
                                         <font key="font" metaFont="smallSystem"/>
                                         <color key="textColor" name="disabledControlTextColor" catalog="System" colorSpace="catalog"/>
@@ -203,9 +216,8 @@
                 <constraint firstAttribute="trailing" secondItem="3145" secondAttribute="trailing" id="3154"/>
                 <constraint firstItem="3145" firstAttribute="leading" secondItem="2894" secondAttribute="leading" id="3155"/>
             </constraints>
-            <point key="canvasLocation" x="268" y="-437"/>
+            <point key="canvasLocation" x="412" y="-682"/>
         </customView>
-        <userDefaultsController representsSharedInstance="YES" id="U5N-S2-0zc"/>
     </objects>
     <resources>
         <image name="NSActionTemplate" width="14" height="14"/>
diff --git a/MacPass/MPDocument.h b/MacPass/MPDocument.h
index 54be4f3d..3dee9ac9 100644
--- a/MacPass/MPDocument.h
+++ b/MacPass/MPDocument.h
@@ -167,6 +167,14 @@ APPKIT_EXTERN NSString *const MPDocumentGroupKey;
 
 - (IBAction)duplicateEntryWithOptions:(id)sender;
 
+
+#pragma mark -
+#pragma mark Editing
+
+- (void)willChangeEntry:(KPKEntry *)entry;
+- (void)commitChangesToEntry:(KPKEntry *)entry;
+- (void)discardChangesToEntry:(KPKEntry *)entry;
+
 @end
 
 @interface MPDocument (Attachments)
@@ -211,23 +219,6 @@ APPKIT_EXTERN NSString *const MPDocumentGroupKey;
 
 @end
 
-#pragma mark -
-#pragma mark Edit Sessiong
-
-APPKIT_EXTERN NSString *const MPDocumentDidBeginEditingSelectedItem;
-APPKIT_EXTERN NSString *const MPDocumentDidCancelChangesToSelectedItem;
-APPKIT_EXTERN NSString *const MPDocumentDidCommitChangesToSelectedItem;
-
-@interface MPDocument (EditingSession)
-
-#pragma mark Edit Actions
-- (IBAction)beginEditingSelectedItem:(id)sender;
-- (IBAction)cancelChangesToSelectedItem:(id)sender;
-- (IBAction)commitChangesToSelectedItem:(id)sender;
-
-@end
-
-
 #pragma mark -
 #pragma mark History Browsing
 
diff --git a/MacPass/MPDocument.m b/MacPass/MPDocument.m
index dfd787d0..2f76d89a 100644
--- a/MacPass/MPDocument.m
+++ b/MacPass/MPDocument.m
@@ -65,7 +65,7 @@ NSString *const MPDocumentGroupKey                        = @"MPDocumentGroupKey
 @property (weak, nonatomic) KPKGroup *root;
 @property (nonatomic, strong) KPKCompositeKey *compositeKey;
 @property (nonatomic, strong) NSData *encryptedData;
-@property (nonatomic, strong) MPTreeDelegate *treeDelgate;
+@property (nonatomic, strong) MPTreeDelegate *treeDelegate;
 
 @property (nonatomic, copy) NSArray<KPKNode *> *selectedNodes;
 
@@ -75,7 +75,9 @@ NSString *const MPDocumentGroupKey                        = @"MPDocumentGroupKey
 @property (strong) IBOutlet NSView *warningView;
 @property (weak) IBOutlet NSImageView *warningViewImage;
 
-@property (assign) BOOL fileChangeDialogOpen;;
+@property (assign) BOOL fileChangeDialogOpen;
+
+@property (strong) NSMutableDictionary *modifiedEntries;
 
 @end
 
@@ -412,12 +414,12 @@ NSString *const MPDocumentGroupKey                        = @"MPDocumentGroupKey
 }
 
 - (void)setTree:(KPKTree *)tree {
-  if(_tree != tree) {
+  if(self.tree != tree) {
     _tree = tree;
-    if(nil == _treeDelgate) {
-      _treeDelgate = [[MPTreeDelegate alloc] initWithDocument:self];
+    if(nil == self.treeDelegate) {
+      self.treeDelegate = [[MPTreeDelegate alloc] initWithDocument:self];
     }
-    _tree.delegate = _treeDelgate;
+    self.tree.delegate = self.treeDelegate;
   }
 }
 
@@ -769,6 +771,22 @@ NSString *const MPDocumentGroupKey                        = @"MPDocumentGroupKey
   [self.trash clear];
 }
 
+- (void)willChangeEntry:(KPKEntry *)entry {
+  /* we store a copy of the entry */
+  NSAssert(nil == self.modifiedEntries[entry.uuid], @"Inconsistent state, pending changes present for entry!");
+  self.modifiedEntries[entry.uuid] = [entry copy];
+}
+
+- (void)discardChangesToEntry:(KPKEntry *)entry {
+  self.modifiedEntries[entry.uuid] = nil;
+  /* TODO KeePassKit copy entry with info from old entry */
+}
+
+- (void)commitChangesToEntry:(KPKEntry *)entry {
+  /* TODO KeePassKit entry pushHistory:self.modifiedEntries[entry.uuid] */
+  [self discardChangesToEntry:entry];
+}
+
 #pragma mark -
 #pragma mark MPTargetNodeResolving
 
diff --git a/MacPass/MPEntryInspectorViewController.h b/MacPass/MPEntryInspectorViewController.h
index 2b9464e7..3010b84c 100644
--- a/MacPass/MPEntryInspectorViewController.h
+++ b/MacPass/MPEntryInspectorViewController.h
@@ -66,7 +66,4 @@
 
 - (IBAction)toggleQuicklookPreview:(id)sender;
 
-- (void)beginEditing;
-- (void)endEditing;
-
 @end
diff --git a/MacPass/MPEntryInspectorViewController.m b/MacPass/MPEntryInspectorViewController.m
index ced94338..ec3082f8 100644
--- a/MacPass/MPEntryInspectorViewController.m
+++ b/MacPass/MPEntryInspectorViewController.m
@@ -268,6 +268,15 @@ static NSString *kMPContentBindingString3 = @"content.%@.%@.%@";
   MPPasswordCreatorViewController *viewController = [[MPPasswordCreatorViewController alloc] init];
   viewController.allowsEntryDefaults = YES;
   viewController.representedObject = self.representedObject;
+  viewController.completionHandler = ^void (NSModalResponse response, NSString *password) {
+    /* TODO mark for modification! */
+    self.generatePasswordButton.enabled = YES;
+    /* We should only use the password if there is actually one */
+    if(password.length > 0) {
+      self.representedEntry.password = password;
+    }
+  };
+  
   [self _showPopopver:viewController atView:self.passwordTextField onEdge:NSMinYEdge];
 }
 
@@ -285,18 +294,6 @@ static NSString *kMPContentBindingString3 = @"content.%@.%@.%@";
 }
 
 - (void)popoverDidClose:(NSNotification *)notification {
-  /* We do not enable the button all the time, but it's working find this way */
-  [self.generatePasswordButton setEnabled:YES];
-  NSPopover *popover = notification.object;
-  id controller = _activePopover.contentViewController;
-  /* Check for password wizzard */
-  if([controller respondsToSelector:@selector(generatedPassword)]) {
-    NSString *password = [controller generatedPassword];
-    /* We should only use the password if there is actually one */
-    if(password.length > 0) {
-      self.representedEntry.password = [controller generatedPassword];
-    }
-  }
   self.activePopover = nil;
 }
 
@@ -437,21 +434,6 @@ static NSString *kMPContentBindingString3 = @"content.%@.%@.%@";
                                   options:nil];
 }
 
-- (void)_toggleEditing:(BOOL)edit {
-  NSArray <NSTextField *> *textFields = @[self.titleTextField,
-                                          self.usernameTextField,
-                                          self.URLTextField,
-                                          self.passwordTextField,
-                                          self.tagsTokenField
-                                          /*self.createdTextField,
-                                           self.modifiedTextField*/
-                                          ];
-  for(NSTextField *t in textFields) {
-    t.editable = edit;
-    t.selectable = edit;
-  }
-}
-
 #pragma mark -
 #pragma mark MPDocument Notifications
 
diff --git a/MacPass/MPEntryViewController.m b/MacPass/MPEntryViewController.m
index b56f4320..f4397b88 100644
--- a/MacPass/MPEntryViewController.m
+++ b/MacPass/MPEntryViewController.m
@@ -457,8 +457,6 @@ NSString *const _MPTableSecurCellView = @"PasswordCell";
 - (void)_didExitHistory:(NSNotification *)notification {
   [self _hideContextBar];
 }
-
-
 #pragma mark ContextBar
 - (void)_updateContextBar {
   MPDocument *document = [[self windowController] document];
diff --git a/MacPass/MPGroupInspectorViewController.h b/MacPass/MPGroupInspectorViewController.h
index 3d1b58d1..24a46cb8 100644
--- a/MacPass/MPGroupInspectorViewController.h
+++ b/MacPass/MPGroupInspectorViewController.h
@@ -22,7 +22,4 @@
 @property (weak) IBOutlet NSPopUpButton *autotypePopupButton;
 @property (weak) IBOutlet HNHUIRoundedTextField *autotypeSequenceTextField;
 
-- (void)beginEditing;
-- (void)endEditing;
-
 @end
diff --git a/MacPass/MPInspectorViewController.h b/MacPass/MPInspectorViewController.h
index eed38911..80757f28 100644
--- a/MacPass/MPInspectorViewController.h
+++ b/MacPass/MPInspectorViewController.h
@@ -19,13 +19,18 @@
 @property (weak) IBOutlet NSTextField *noSelectionInfo;
 @property (weak) IBOutlet MPPopupImageView *itemImageView;
 @property (weak) IBOutlet NSTextField *itemNameTextField;
-@property (weak) IBOutlet NSButton *editButton;
-@property (weak) IBOutlet NSButton *cancelEditButton;
+@property (weak) IBOutlet NSButton *saveChangesButton;
+@property (weak) IBOutlet NSButton *discardChangesButton;
 
 - (IBAction)pickIcon:(id)sender;
 - (IBAction)pickExpiryDate:(id)sender;
+- (IBAction)saveChanges:(id)sender;
+- (IBAction)discardChanges:(id)sender;
+
 
 /* Separate call to ensure all registered objects are in place */
 - (void)registerNotificationsForDocument:(NSDocument *)document;
 
+
+
 @end
diff --git a/MacPass/MPInspectorViewController.m b/MacPass/MPInspectorViewController.m
index 0bb95485..fe154ca8 100644
--- a/MacPass/MPInspectorViewController.m
+++ b/MacPass/MPInspectorViewController.m
@@ -100,7 +100,8 @@ typedef NS_ENUM(NSUInteger, MPContentTab) {
   
   [self.view layout];
   
-  self.cancelEditButton.hidden = YES;
+  self.discardChangesButton.hidden = YES;
+  self.saveChangesButton.hidden = YES;
 }
 
 - (void)registerNotificationsForDocument:(MPDocument *)document {
@@ -183,6 +184,22 @@ typedef NS_ENUM(NSUInteger, MPContentTab) {
   [self.popover showRelativeToRect:NSZeroRect ofView:sender preferredEdge:NSMinYEdge];
 }
 
+
+- (void)saveChanges:(id)sender {
+  MPDocument *document = self.windowController.document;
+  KPKEntry *entry = self.representedObject;
+  [document commitChangesToEntry:entry];
+}
+
+- (void)discardChanges:(id)sender {
+  MPDocument *document = self.windowController.document;
+  KPKEntry *entry = self.representedObject;
+  [document discardChangesToEntry:entry];
+}
+
+#pragma mark -
+#pragma mark NSPopover Delegate
+
 - (void)popoverDidClose:(NSNotification *)notification {
   /* clear out the popover */
   self.popover = nil;
@@ -206,14 +223,16 @@ typedef NS_ENUM(NSUInteger, MPContentTab) {
 //                       options:@{NSNullPlaceholderBindingOption: NSLocalizedString(@"NONE", "")}];
 }
 
-#pragma mark -
-#pragma mark Editing
-- (void)_toggleEditors:(BOOL)editable {
-  self.itemImageView.enabled = editable;
-  self.itemNameTextField.enabled = editable;
-  self.itemImageView.editable = editable;
-  self.notesTextView.editable = editable;
+- (void)willChangeValueForRepresentedObjectKeyPath:(NSString *)keyPath {
+  MPDocument *document = self.windowController.document;
+  KPKEntry *entry = [self.representedObject asEntry];
+  if(entry) {
+    [document willChangeEntry:entry];
+  }
 }
+
+
+
 #pragma mark -
 #pragma mark MPDocument Notifications
 
@@ -232,24 +251,6 @@ typedef NS_ENUM(NSUInteger, MPContentTab) {
   self.representedObject = node;
   self.entryViewController.representedObject = node.asEntry;
   self.groupViewController.representedObject = node.asGroup;
-  [self _toggleEditors:(nil != node.asGroup)];
 }
 
-- (IBAction)beginEditing:(id)sender {
-  self.editButton.action = @selector(commitEditing:);
-  self.editButton.title = NSLocalizedString(@"SAVE", "");
-  self.cancelEditButton.hidden = NO;
-  [self _toggleEditors:YES];
-}
-
-- (IBAction)cancelEditing:(id)sender {
-  self.editButton.title = NSLocalizedString(@"EDIT", "");
-  self.cancelEditButton.hidden = YES;
-  self.editButton.action = @selector(beginEditing:);
-  [self _toggleEditors:NO];
-}
-
-- (IBAction)commitEditing:(id)sender {
-  [self cancelEditing:sender];
-}
 @end
diff --git a/MacPass/MPPasswordCreatorViewController.h b/MacPass/MPPasswordCreatorViewController.h
index 3325b391..9a761d36 100644
--- a/MacPass/MPPasswordCreatorViewController.h
+++ b/MacPass/MPPasswordCreatorViewController.h
@@ -6,14 +6,22 @@
 //  Copyright (c) 2013 HicknHack Software GmbH. All rights reserved.
 //
 
+
 #import "MPViewController.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
 @class KPKEntry;
 
 @interface MPPasswordCreatorViewController : MPViewController <NSTextFieldDelegate>
 
-@property (copy, readonly) NSString *generatedPassword;
+
 //@property (weak) id closeTarget;
 @property (assign) BOOL allowsEntryDefaults;
+/**
+ *  Block gets called whenever the user opts to store the password or cancel
+ */
+@property (nonatomic, copy, nullable) void (^completionHandler)(NSModalResponse response, NSString *password);
 
 /**
  *  Should be called to reset the generator
@@ -23,3 +31,5 @@
 - (void)reset;
 
 @end
+
+NS_ASSUME_NONNULL_END
diff --git a/MacPass/MPPasswordCreatorViewController.m b/MacPass/MPPasswordCreatorViewController.m
index 15c3afda..4e97b7a6 100644
--- a/MacPass/MPPasswordCreatorViewController.m
+++ b/MacPass/MPPasswordCreatorViewController.m
@@ -171,14 +171,19 @@ typedef NS_ENUM(NSUInteger, MPPasswordRating) {
 }
 
 - (IBAction)_usePassword:(id)sender {
-  self.generatedPassword = self.password;
   if(self.shouldCopyPasswordToPasteboardButton.state == NSOnState) {
     [[MPPasteBoardController defaultController] copyObjects:@[self.password]];
   }
+  if(self.completionHandler) {
+    self.completionHandler(NSModalResponseOK, self.password);
+  }
   [self.view.window performClose:sender];
 }
 
 - (IBAction)_cancel:(id)sender {
+  if(self.completionHandler) {
+    self.completionHandler(NSModalResponseCancel, self.password);
+  }
   [self.view.window performClose:sender];
 }
 
diff --git a/MacPass/MPViewController.h b/MacPass/MPViewController.h
index 649d37d8..4a2eda74 100644
--- a/MacPass/MPViewController.h
+++ b/MacPass/MPViewController.h
@@ -16,8 +16,6 @@
 - (NSResponder *)reconmendedFirstResponder;
 - (void)updateResponderChain;
 
-
-
 #pragma mark Binding Observation
 /**
  *  Override this to get notificied when setValue:forKeyPath will be called with a keypath starting with representedObject.
@@ -36,4 +34,6 @@
  */
 - (void)didChangeValueForRepresentedObjectKeyPath:(NSString *)keyPath;
 
+
+
 @end
diff --git a/MacPass/MPViewController.m b/MacPass/MPViewController.m
index 71b21c86..df15aa35 100644
--- a/MacPass/MPViewController.m
+++ b/MacPass/MPViewController.m
@@ -41,7 +41,7 @@
 #pragma mark Binding observation
 - (void)setValue:(id)value forKeyPath:(NSString *)keyPath {
   if([keyPath hasPrefix:@"representedObject."]) {
-    [self didChangeValueForRepresentedObjectKeyPath:keyPath];
+    [self willChangeValueForRepresentedObjectKeyPath:keyPath];
     [super setValue:value forKeyPath:keyPath];
     [self didChangeValueForRepresentedObjectKeyPath:keyPath];
   }