diff --git a/src/components/SelectPrinterDialog.vue b/src/components/SelectPrinterDialog.vue
index ce68ee2f..bcb86182 100644
--- a/src/components/SelectPrinterDialog.vue
+++ b/src/components/SelectPrinterDialog.vue
@@ -35,7 +35,11 @@
                         <v-col class="col-8">
                             <v-text-field
                                 v-model="dialogAddPrinter.hostname"
-                                :rules="[v => !!v || 'Hostname is required']"
+                                :rules="[
+                                    v => !!v || 'Hostname is required',
+                                    v => !v.startsWith('http:') || 'invalid hostname/IP',
+                                    v => !v.startsWith('https:') || 'invalid hostname/IP',
+                                ]"
                                 label="Hostname/IP"
                                 required
                             ></v-text-field>
@@ -69,7 +73,11 @@
                         <v-col class="col-8">
                             <v-text-field
                                 v-model="dialogEditPrinter.hostname"
-                                :rules="[v => !!v || 'Hostname is required']"
+                                :rules="[
+                                    v => !!v || 'Hostname is required',
+                                    v => !v.startsWith('http:') || 'invalid hostname/IP',
+                                    v => !v.startsWith('https:') || 'invalid hostname/IP',
+                                ]"
                                 label="Hostname/IP"
                                 required
                             ></v-text-field>