diff --git a/src/fields/DayOfMonth.tsx b/src/fields/DayOfMonth.tsx
index f767520..aa06766 100644
--- a/src/fields/DayOfMonth.tsx
+++ b/src/fields/DayOfMonth.tsx
@@ -128,6 +128,7 @@ export default function DayOfMonth() {
   return (
     <Box display='flex' p={1} m={1}>
       <CustomSelect
+        single
         options={onEveryOptions}
         label={'On/Every'}
         value={dayOfMonthAtEvery}
@@ -163,6 +164,7 @@ export default function DayOfMonth() {
         <>
           <Typography classes={{ root: classes.between }}>between</Typography>
           <CustomSelect
+            single
             options={possibleStartDays}
             label={''}
             value={startMonth}
@@ -177,6 +179,7 @@ export default function DayOfMonth() {
           />
           <Typography classes={{ root: classes.between }}>and</Typography>
           <CustomSelect
+            single
             options={possibleEndDays}
             label={''}
             value={endMonth}
diff --git a/src/fields/Hour.tsx b/src/fields/Hour.tsx
index 7e74355..e2e574d 100644
--- a/src/fields/Hour.tsx
+++ b/src/fields/Hour.tsx
@@ -106,6 +106,7 @@ export default function Hour() {
   return (
     <Box display='flex' p={1} m={1}>
       <CustomSelect
+        single
         options={isAdmin ? atEveryOptions : atOptionsNonAdmin}
         label={'At/Every'}
         value={hourAtEvery}
@@ -139,6 +140,7 @@ export default function Hour() {
         <>
           <Typography classes={{ root: classes.between }}>between</Typography>
           <CustomSelect
+            single
             options={possibleStartTimes}
             label={''}
             value={startHour}
@@ -154,6 +156,7 @@ export default function Hour() {
           />
           <Typography classes={{ root: classes.between }}>and</Typography>
           <CustomSelect
+            single
             options={possibleEndTimes}
             label={''}
             value={endHour}
diff --git a/src/fields/Minute.tsx b/src/fields/Minute.tsx
index 0a3039a..9f5d026 100644
--- a/src/fields/Minute.tsx
+++ b/src/fields/Minute.tsx
@@ -113,6 +113,7 @@ export default function Minute() {
   return (
     <Box display='flex' p={1} m={1}>
       <CustomSelect
+        single
         options={isAdmin ? atEveryOptions : atOptionsNonAdmin}
         label={'At/Every'}
         disableClearable
@@ -146,6 +147,7 @@ export default function Minute() {
         <>
           <Typography classes={{ root: classes.between }}>between</Typography>
           <CustomSelect
+            single
             options={possibleStartTimes}
             label={''}
             value={startMinute}
@@ -161,6 +163,7 @@ export default function Minute() {
           />
           <Typography classes={{ root: classes.between }}>and</Typography>
           <CustomSelect
+            single
             options={possibleEndTimes}
             label={''}
             value={endMinute}
diff --git a/src/fields/Period.tsx b/src/fields/Period.tsx
index 7667735..178b91f 100644
--- a/src/fields/Period.tsx
+++ b/src/fields/Period.tsx
@@ -29,6 +29,7 @@ export default function Period() {
     <Box display='flex' p={1} m={1}>
       <Typography classes={{ root: classes.every }}>Every</Typography>
       <CustomSelect
+        single
         disableClearable
         options={isAdmin ? periodOptions : periodOptionsNonAdmin}
         label={'Period'}