diff --git a/x-pack/plugins/fleet/common/types/rest_spec/agent.ts b/x-pack/plugins/fleet/common/types/rest_spec/agent.ts
index 82d5a779c2ed43..886730d38f8314 100644
--- a/x-pack/plugins/fleet/common/types/rest_spec/agent.ts
+++ b/x-pack/plugins/fleet/common/types/rest_spec/agent.ts
@@ -89,7 +89,7 @@ export interface PostBulkAgentUpgradeRequest {
     agents: string[] | string;
     source_uri?: string;
     version: string;
-    rollout_duration_seconds?: number
+    rollout_duration_seconds?: number;
   };
 }
 
diff --git a/x-pack/plugins/fleet/public/applications/fleet/sections/agents/components/agent_upgrade_modal/constants.tsx b/x-pack/plugins/fleet/public/applications/fleet/sections/agents/components/agent_upgrade_modal/constants.tsx
index abdd6552742f1e..b5d8cd8f4d72d6 100644
--- a/x-pack/plugins/fleet/public/applications/fleet/sections/agents/components/agent_upgrade_modal/constants.tsx
+++ b/x-pack/plugins/fleet/public/applications/fleet/sections/agents/components/agent_upgrade_modal/constants.tsx
@@ -10,31 +10,23 @@
 // in the event that the updated versions cannot be retrieved from the endpoint
 
 export const FALLBACK_VERSIONS = [
- '8.2.0',
- '8.1.3',
- '8.1.2',
- '8.1.1',
- '8.1.0',
- '8.0.1',
- '8.0.0',
- '7.9.3',
- '7.9.2',
- '7.9.1',
- '7.9.0',
- '7.8.1',
- '7.8.0',
- '7.17.3',
- '7.17.2',
- '7.17.1',
- '7.17.0'
+  '8.2.0',
+  '8.1.3',
+  '8.1.2',
+  '8.1.1',
+  '8.1.0',
+  '8.0.1',
+  '8.0.0',
+  '7.9.3',
+  '7.9.2',
+  '7.9.1',
+  '7.9.0',
+  '7.8.1',
+  '7.8.0',
+  '7.17.3',
+  '7.17.2',
+  '7.17.1',
+  '7.17.0',
 ];
 
-export const MAINTAINANCE_VALUES = [
-  1,
-  2,
-  4,
-  8,
-  12,
-  24,
-  48
-];
+export const MAINTAINANCE_VALUES = [1, 2, 4, 8, 12, 24, 48];
diff --git a/x-pack/plugins/fleet/public/applications/fleet/sections/agents/components/agent_upgrade_modal/index.tsx b/x-pack/plugins/fleet/public/applications/fleet/sections/agents/components/agent_upgrade_modal/index.tsx
index 696a2a729d7d07..34cf9085d78a55 100644
--- a/x-pack/plugins/fleet/public/applications/fleet/sections/agents/components/agent_upgrade_modal/index.tsx
+++ b/x-pack/plugins/fleet/public/applications/fleet/sections/agents/components/agent_upgrade_modal/index.tsx
@@ -27,6 +27,7 @@ import {
   sendPostBulkAgentUpgrade,
   useStartServices,
 } from '../../../../hooks';
+
 import { FALLBACK_VERSIONS, MAINTAINANCE_VALUES } from './constants';
 
 interface Props {
@@ -43,38 +44,46 @@ export const AgentUpgradeAgentModal: React.FunctionComponent<Props> = ({
   const { notifications } = useStartServices();
   const [isSubmitting, setIsSubmitting] = useState(false);
   const isSingleAgent = Array.isArray(agents) && agents.length === 1;
-  const isSmallBatch =  Array.isArray(agents) && agents.length > 1 && agents.length <= 10;
+  const isSmallBatch = Array.isArray(agents) && agents.length > 1 && agents.length <= 10;
   const isAllAgents = agents === '';
 
-  const fallbackVersions: Array<EuiComboBoxOptionOption<string>> = FALLBACK_VERSIONS.map((option) => ({
-    label: option,
-    value: option,
-  }));
+  const fallbackVersions: Array<EuiComboBoxOptionOption<string>> = FALLBACK_VERSIONS.map(
+    (option) => ({
+      label: option,
+      value: option,
+    })
+  );
   const maintainanceWindows = isSmallBatch ? [0].concat(MAINTAINANCE_VALUES) : MAINTAINANCE_VALUES;
-  const maintainanceOptions: Array<EuiComboBoxOptionOption<number>> = maintainanceWindows.map((option) => ({
-    label: option === 0 ? i18n.translate(
-      'xpack.fleet.upgradeAgents.noMaintainanceWindowOption',
-      {
-        defaultMessage: 'Immediately',
-      }
-    ) : i18n.translate('xpack.fleet.upgradeAgents.hourLabel', {
-      defaultMessage:
-        '{option} {count, plural, one {hour} other {hours}}',
-      values: { option, count: option === 1  },
-    }),
-    value: option === 0 ? 0 : option * 3600
-  }));
+  const maintainanceOptions: Array<EuiComboBoxOptionOption<number>> = maintainanceWindows.map(
+    (option) => ({
+      label:
+        option === 0
+          ? i18n.translate('xpack.fleet.upgradeAgents.noMaintainanceWindowOption', {
+              defaultMessage: 'Immediately',
+            })
+          : i18n.translate('xpack.fleet.upgradeAgents.hourLabel', {
+              defaultMessage: '{option} {count, plural, one {hour} other {hours}}',
+              values: { option, count: option === 1 },
+            }),
+      value: option === 0 ? 0 : option * 3600,
+    })
+  );
   const [selectedVersion, setSelectedVersion] = useState([fallbackVersions[0]]);
-  const [selectedMantainanceWindow, setSelectedMantainanceWindow] = useState([maintainanceOptions[0]]);
+  const [selectedMantainanceWindow, setSelectedMantainanceWindow] = useState([
+    maintainanceOptions[0],
+  ]);
 
-
-  const getVersion = (version: EuiComboBoxOptionOption<string>[]) => version[0].value as string;
+  const getVersion = (version: Array<EuiComboBoxOptionOption<string>>) =>
+    version[0].value as string;
 
   async function onSubmit() {
     const version = getVersion(selectedVersion);
-    const rolloutOptions = selectedMantainanceWindow.length > 0 && selectedMantainanceWindow[0]?.value as number > 0 ? {
-      rollout_duration_seconds: selectedMantainanceWindow[0].value
-    } : {};
+    const rolloutOptions =
+      selectedMantainanceWindow.length > 0 && (selectedMantainanceWindow[0]?.value as number) > 0
+        ? {
+            rollout_duration_seconds: selectedMantainanceWindow[0].value,
+          }
+        : {};
 
     try {
       setIsSubmitting(true);
@@ -82,11 +91,11 @@ export const AgentUpgradeAgentModal: React.FunctionComponent<Props> = ({
         ? await sendPostAgentUpgrade((agents[0] as Agent).id, {
             version,
           })
-        :  await sendPostBulkAgentUpgrade({
+        : await sendPostBulkAgentUpgrade({
             version,
             agents: Array.isArray(agents) ? agents.map((agent) => agent.id) : agents,
-            ...rolloutOptions
-          })
+            ...rolloutOptions,
+          });
       if (error) {
         throw error;
       }