diff --git a/FaceExplorer.xcodeproj/project.pbxproj b/FaceExplorer.xcodeproj/project.pbxproj
index 53eaacf..443bf76 100644
--- a/FaceExplorer.xcodeproj/project.pbxproj
+++ b/FaceExplorer.xcodeproj/project.pbxproj
@@ -403,7 +403,7 @@
 					"@executable_path/../Frameworks",
 				);
 				MACOSX_DEPLOYMENT_TARGET = 12.0;
-				MARKETING_VERSION = 0.0.4;
+				MARKETING_VERSION = 0.0.6;
 				PRODUCT_BUNDLE_IDENTIFIER = com.FaceExplorer;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				PROVISIONING_PROFILE_SPECIFIER = "";
@@ -439,7 +439,7 @@
 					"@executable_path/../Frameworks",
 				);
 				MACOSX_DEPLOYMENT_TARGET = 12.0;
-				MARKETING_VERSION = 0.0.4;
+				MARKETING_VERSION = 0.0.6;
 				PRODUCT_BUNDLE_IDENTIFIER = com.FaceExplorer;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				PROVISIONING_PROFILE_SPECIFIER = "";
diff --git a/FaceExplorer/Model/ModelData.swift b/FaceExplorer/Model/ModelData.swift
index 83b87ef..d0da129 100755
--- a/FaceExplorer/Model/ModelData.swift
+++ b/FaceExplorer/Model/ModelData.swift
@@ -7,7 +7,7 @@ final class ModelData: ObservableObject {
     @Published var persons: [Person] = []
     @Published var faces: [Face] = []
     @Published var errorOccurred = false
-    @Published var errorMessage: String?
+    @Published var errorMessage: String = ""
 
     let faceAttributes = getFaceAttributes()
 
diff --git a/FaceExplorer/Views/Faces/FaceGrid.swift b/FaceExplorer/Views/Faces/FaceGrid.swift
index b8a9845..3efe739 100755
--- a/FaceExplorer/Views/Faces/FaceGrid.swift
+++ b/FaceExplorer/Views/Faces/FaceGrid.swift
@@ -74,7 +74,7 @@ struct FaceGrid: View {
             }
         })
         .frame(minWidth: 100, maxWidth: .infinity, minHeight: 100, maxHeight: .infinity, alignment: .topLeading)
-        .alert(modelData.errorMessage!, isPresented: $modelData.errorOccurred) {
+        .alert(modelData.errorMessage, isPresented: $modelData.errorOccurred) {
             Button("Select Library...", action: modelData.selectLibrary)
             Button("Close", role: .cancel, action: {})
         }