diff --git a/installer/src/main/java/ca/weblite/jdeploy/installer/Main.java b/installer/src/main/java/ca/weblite/jdeploy/installer/Main.java
index 47815357..f23a91bd 100644
--- a/installer/src/main/java/ca/weblite/jdeploy/installer/Main.java
+++ b/installer/src/main/java/ca/weblite/jdeploy/installer/Main.java
@@ -756,8 +756,8 @@ private void onProceedWithUninstallation(InstallationFormEvent evt) {
                 String finalMessage = message;
                 invokeLater(() -> uiFactory.showModalErrorDialog(
                         evt.getInstallationForm(),
-                        "Uninstallation failed. " + finalMessage,
-                        "Failed"
+                        finalMessage,
+                        "Uninstallation Failed"
                 ));
             }
         }).start();
@@ -786,7 +786,7 @@ private void onProceedWithInstallation(InstallationFormEvent evt) {
                     }
                 }
                 String finalMessage = message;
-                invokeLater(()-> uiFactory.showModalErrorDialog(evt.getInstallationForm(), "Installation failed. "+finalMessage, "Failed"));
+                invokeLater(()-> uiFactory.showModalErrorDialog(evt.getInstallationForm(), finalMessage, "Installation Failed"));
             }
         }).start();
     }
diff --git a/shared/src/main/java/com/client4j/security/PermissionTool.java b/shared/src/main/java/com/client4j/security/PermissionTool.java
index b5ac503a..8d593c2f 100644
--- a/shared/src/main/java/com/client4j/security/PermissionTool.java
+++ b/shared/src/main/java/com/client4j/security/PermissionTool.java
@@ -100,8 +100,12 @@ public static boolean requestPermissions(Component parentComponent, Permission..
                 return true;
             } catch (IOException ex2) {
                 ex2.printStackTrace();
-                JOptionPane.showMessageDialog(parentComponent, "<html><p>Failed to install permission:</p><p> "+ex2.getMessage()+"</p></html");
-                
+                String errorMessage = "<html><body style='width: 400px;'>" +
+                        "<h3>Failed to install permission</h3>" +
+                        "<p>" + ex2.getMessage() + "</p>" +
+                        "</body></html>";
+                JOptionPane.showMessageDialog(parentComponent, errorMessage, "Error", JOptionPane.ERROR_MESSAGE);
+
                 return false;
             }
         } else {
@@ -140,7 +144,11 @@ public static boolean requestPermission(Component parentComponent, Permission pe
                     installPermission(perm);
                     return true;
                 } catch (IOException ex2) {
-                    JOptionPane.showMessageDialog(parentComponent, "Failed to install permission: "+ex2.getMessage());
+                    String errorMessage = "<html><body style='width: 400px;'>" +
+                            "<h3>Failed to install permission</h3>" +
+                            "<p>" + ex2.getMessage() + "</p>" +
+                            "</body></html>";
+                    JOptionPane.showMessageDialog(parentComponent, errorMessage, "Error", JOptionPane.ERROR_MESSAGE);
                     return false;
                 }
             } else {
