diff --git a/advlabdb/adminModelViews.py b/advlabdb/adminModelViews.py
index 9aff87c..9dabcab 100644
--- a/advlabdb/adminModelViews.py
+++ b/advlabdb/adminModelViews.py
@@ -363,6 +363,9 @@ class PartView(SecureAdminModelView):
             "Program", query_factory=programQueryFactory, validators=[DataRequired()], allow_blank=True, blank_text="-"
         )
     }
+    form_args = {
+        "number": {"widget": NumberInput(min=1)},
+    }
 
     column_searchable_list = ["program.label", "number"]
 
@@ -408,6 +411,7 @@ class StudentView(SecureAdminModelView):
     ]
 
     form_args = {
+        "student_number": {"widget": NumberInput(min=0)},
         "uni_email": {"validators": [Email()]},
         "contact_email": {"validators": [Email()]},
     }
@@ -659,7 +663,9 @@ class ExperimentView(SecureAdminModelView):
     ]
 
     form_args = {
+        "number": {"widget": NumberInput(min=1)},
         "wiki_link": {"validators": [URL()]},
+        "duration_in_days": {"widget": NumberInput(min=1)},
     }
     form_extra_fields = {
         "program": QuerySelectField(