diff --git a/equipment/admin.py b/equipment/admin.py
index 6411229..45a5f29 100644
--- a/equipment/admin.py
+++ b/equipment/admin.py
@@ -36,6 +36,7 @@ class EquipmentRevisionExtraInline(admin.TabularInline):
     extra = 0
     form = IdForm
     formset = IdFormset
+    classes = ['collapse']
 
 
 class EquipmentRemarkExtraInline(admin.TabularInline):
@@ -43,6 +44,7 @@ class EquipmentRemarkExtraInline(admin.TabularInline):
     extra = 0
     form = IdForm
     formset = IdFormset
+    classes = ['collapse']
 
 class CharFieldModelAdmin(admin.ModelAdmin):
     list_display = ['name']