diff --git a/dummydatasqlite.sql b/dummydatasqlite.sql
index a936c8c..b6948e5 100644
--- a/dummydatasqlite.sql
+++ b/dummydatasqlite.sql
@@ -77,6 +77,7 @@ INSERT INTO `course` (name) VALUES
 ('Numerik gewöhnlicher Differentialgleichungen'),
 ('Numerische Lineare Algebra'),
 ('Numerische Mathe für MB (IV)'),
+('Parabolische PDEs'),
 ('Partial Differential Equations I'),
 ('Probability Theory'),
 ('Riemannsche Flächen'),
diff --git a/go.mod b/go.mod
index fc3c910..5149708 100644
--- a/go.mod
+++ b/go.mod
@@ -2,6 +2,6 @@ module officeHours
 
 go 1.18
 
-require github.com/mattn/go-sqlite3 v1.14.17
+require github.com/mattn/go-sqlite3 v1.14.18
 
 require github.com/go-sql-driver/mysql v1.7.1
diff --git a/go.sum b/go.sum
index 243e249..9b485f1 100644
--- a/go.sum
+++ b/go.sum
@@ -1,4 +1,4 @@
 github.com/go-sql-driver/mysql v1.7.1 h1:lUIinVbN1DY0xBg0eMOzmmtGoHwWBbvnWubQUrtU8EI=
 github.com/go-sql-driver/mysql v1.7.1/go.mod h1:OXbVy3sEdcQ2Doequ6Z5BW6fXNQTmx+9S1MCJN5yJMI=
-github.com/mattn/go-sqlite3 v1.14.17 h1:mCRHCLDUBXgpKAqIKsaAaAsrAlbkeomtRFKXh2L6YIM=
-github.com/mattn/go-sqlite3 v1.14.17/go.mod h1:2eHXhiwb8IkHr+BDWZGa96P6+rkvnG63S2DGjv9HUNg=
+github.com/mattn/go-sqlite3 v1.14.18 h1:JL0eqdCOq6DJVNPSvArO/bIV9/P7fbGrV00LZHc+5aI=
+github.com/mattn/go-sqlite3 v1.14.18/go.mod h1:2eHXhiwb8IkHr+BDWZGa96P6+rkvnG63S2DGjv9HUNg=
diff --git a/templating/templates/addMask.html b/templating/templates/addMask.html
index ab7ed6a..2444371 100644
--- a/templating/templates/addMask.html
+++ b/templating/templates/addMask.html
@@ -35,6 +35,7 @@
 
       <div class="form-floating mb-3">
         <select class="form-control form-select required" required name="veranstaltung" id="veranstaltung">
+          <option disabled selected value>–– auswählen ––</option>
           {{range $course := .Courses}}
           <option value="{{$course.Id}}"{{if eq $course.Id $.SelectedCourse}} selected{{end}}>{{$course.Name}}</option>
           {{end}}
@@ -63,6 +64,7 @@
 
           <div class="form-floating mb-3">
             <select class="form-control form-select required" required name="tag" id="tag">
+              <option disabled selected value>–– auswählen ––</option>
               <option value="0"{{if eq 0 $.Date.Day}} selected{{end}}>Montag</option>
               <option value="1"{{if eq 1 $.Date.Day}} selected{{end}}>Dienstag</option>
               <option value="2"{{if eq 2 $.Date.Day}} selected{{end}}>Mittwoch</option>
@@ -102,6 +104,7 @@
 
           <div class="form-floating mb-3">
             <select class="form-control form-select required" required name="raum" id="raum">
+              <option disabled selected value>–– auswählen ––</option>
               {{range $room := .Rooms}}
               <option value="{{$room.Id}}"{{if eq $room.Id $.SelectedRoom}} selected{{end}}>{{$room.Name}}</option>
               {{end}}
diff --git a/templating/templates/index.html b/templating/templates/index.html
index 007b0a7..683028b 100644
--- a/templating/templates/index.html
+++ b/templating/templates/index.html
@@ -14,7 +14,7 @@ Sprechstunden
     <div class="input-group mb-3">
       <div class="form-floating col-lg-8">
         <select class="form-control form-select" name="veranstaltung" id="veranstaltung" size="1" onchange="document.forms[0].submit()">
-          <option value="">–– auswählen ––</option>
+          <option disabled selected value>–– auswählen ––</option>
           {{range $course := .Courses}}
           <option value="{{$course.Id}}"{{if eq $course.Id $.SelectedCourse}} selected{{end}}>{{$course.Name}}</option>
           {{end}}
@@ -30,7 +30,7 @@ Sprechstunden
     <div class="input-group mb-3">
       <div class="form-floating">
         <select class="form-control form-select" name="raum" id="raum" size="1" onchange="document.forms[1].submit()">
-          <option value="">–– auswählen ––</option>
+          <option disabled selected value>–– auswählen ––</option>
           {{range $room := .Rooms}}
           <option value="{{$room.Id}}"{{if eq $room.Id $.SelectedRoom}} selected{{end}}>{{$room.Name}}</option>
           {{end}}