diff --git a/.eslintrc.cjs b/.eslintrc.cjs
index 3332afe8f..97750c00d 100644
--- a/.eslintrc.cjs
+++ b/.eslintrc.cjs
@@ -64,7 +64,9 @@ module.exports = {
 			],
 			plugins: ['@typescript-eslint', 'react', 'react-hooks'],
 			rules: {
+				'no-void': 'off',
 				'ban-ts-comment': 'off',
+				'no-use-before-define': 'off',
 				'react/no-unescaped-entities': 'off',
 				'react/jsx-no-target-blank': 'off',
 				'@typescript-eslint/ban-ts-comment': 'off',
diff --git a/site/source/api/sirene.ts b/site/source/api/sirene.ts
index 5c17baf48..a7618f592 100644
--- a/site/source/api/sirene.ts
+++ b/site/source/api/sirene.ts
@@ -53,16 +53,16 @@ async function searchFullText(
 	if (!response.ok) {
 		return null
 	}
-	const json: SireneData = await response.json()
+	const json = (await response.json()) as SireneData
 	const etablissements = json.etablissement
 		.filter(
-			({ is_siege, categorie_entreprise, activite_principale }) =>
-				categorie_entreprise !== 'ETI' &&
-				is_siege === '1' &&
-				activite_principale !== '8411Z'
+			(data) =>
+				data.categorie_entreprise !== 'ETI' &&
+				data.is_siege === '1' &&
+				data.activite_principale !== '8411Z'
 		)
-		.map(({ l1_normalisee, siren }) => ({
-			denomination: l1_normalisee,
+		.map(({ l1_normalisee: denomination, siren }) => ({
+			denomination,
 			siren,
 		}))
 
diff --git a/site/source/components/Notifications.tsx b/site/source/components/Notifications.tsx
index 6279c82ce..fe9b3bdc7 100644
--- a/site/source/components/Notifications.tsx
+++ b/site/source/components/Notifications.tsx
@@ -71,7 +71,7 @@ export default function Notifications() {
 			{messages.map(({ sévérité, dottedName, résumé, description }) => (
 				<Message
 					icon
-					type={sévérité == 'avertissement' ? 'info' : 'primary'}
+					type={sévérité === 'avertissement' ? 'info' : 'primary'}
 					key={dottedName}
 				>
 					<Markdown>{résumé ?? description ?? ''}</Markdown>{' '}
diff --git a/site/source/components/SchemeComparaison.tsx b/site/source/components/SchemeComparaison.tsx
index 53698f6fc..d2ca65228 100644
--- a/site/source/components/SchemeComparaison.tsx
+++ b/site/source/components/SchemeComparaison.tsx
@@ -50,8 +50,7 @@ export default function SchemeComparaison({
 
 	const situation = useSelector(situationSelector)
 	const displayResult =
-		useSelector(situationSelector)['dirigeant . rémunération . totale'] !=
-		undefined
+		useSelector(situationSelector)['dirigeant . rémunération . totale'] != null
 	const assimiléEngine = useMemo(
 		() =>
 			engine.shallowCopy().setSituation({
diff --git a/site/source/components/SimulateurWarning.tsx b/site/source/components/SimulateurWarning.tsx
index 1b326d223..98eccd5d2 100644
--- a/site/source/components/SimulateurWarning.tsx
+++ b/site/source/components/SimulateurWarning.tsx
@@ -22,7 +22,7 @@ export default function SimulateurWarning({
 			localStorageKey={'app::simulateurs:warning-folded:v1:' + simulateur}
 		>
 			<Ul>
-				{simulateur == 'auto-entrepreneur' && (
+				{simulateur === 'auto-entrepreneur' && (
 					<>
 						<Li>
 							<Trans i18nKey="simulateurs.warning.auto-entrepreneur">
@@ -59,7 +59,7 @@ export default function SimulateurWarning({
 					</Li>
 				)}
 
-				{simulateur == 'profession-libérale' && (
+				{simulateur === 'profession-libérale' && (
 					<Trans i18nKey="simulateurs.warning.profession-libérale">
 						<Li>
 							Ce simulateur est à destination des professions libérales en BNC.
diff --git a/site/source/components/conversation/RuleInput.tsx b/site/source/components/conversation/RuleInput.tsx
index ef4b85cf3..1bc7cc721 100644
--- a/site/source/components/conversation/RuleInput.tsx
+++ b/site/source/components/conversation/RuleInput.tsx
@@ -124,7 +124,7 @@ export default function RuleInput<Names extends string = DottedName>({
 		throw new Error("Les seules API implémentées sont 'commune'")
 	}
 
-	if (rule.dottedName == 'contrat salarié . ATMP . taux collectif ATMP') {
+	if (rule.dottedName === 'contrat salarié . ATMP . taux collectif ATMP') {
 		return <SelectAtmp {...commonProps} />
 	}
 
diff --git a/site/source/components/layout/NewsBanner.tsx b/site/source/components/layout/NewsBanner.tsx
index 36847d061..2c4637042 100644
--- a/site/source/components/layout/NewsBanner.tsx
+++ b/site/source/components/layout/NewsBanner.tsx
@@ -30,7 +30,7 @@ export default function NewsBanner() {
 	useEffect(() => {
 		setItem(
 			localStorageKey,
-			lastViewedRelease == undefined ? lastRelease.name : lastViewedRelease
+			lastViewedRelease == null ? lastRelease.name : lastViewedRelease
 		)
 	}, [])
 
diff --git a/site/source/pages/Documentation.tsx b/site/source/pages/Documentation.tsx
index c6623d992..aa7f96bcd 100644
--- a/site/source/pages/Documentation.tsx
+++ b/site/source/pages/Documentation.tsx
@@ -264,6 +264,8 @@ function componentCSS(Compo: unknown, props: Record<never, never>): string {
 			}
 			// eslint-disable-next-line no-console
 			console.error('Should not happen', result, typeof result)
+
+			return false
 		})
 		.join('')
 }
diff --git a/site/source/pages/Simulateurs/EconomieCollaborative/ActiviteCard/index.tsx b/site/source/pages/Simulateurs/EconomieCollaborative/ActiviteCard/index.tsx
index b63bd94e5..4ea68a13c 100644
--- a/site/source/pages/Simulateurs/EconomieCollaborative/ActiviteCard/index.tsx
+++ b/site/source/pages/Simulateurs/EconomieCollaborative/ActiviteCard/index.tsx
@@ -40,7 +40,9 @@ export const ActiviteCard = ({
 		// debounce to avoid double onClick call when clicking on checkbox
 		() =>
 			debounce(1, () => {
-				selected === undefined ? null : dispatch?.(toggleActivité(title))
+				if (selected !== undefined) {
+					dispatch?.(toggleActivité(title))
+				}
 			})(),
 		[dispatch, selected]
 	)
diff --git a/site/source/pages/Simulateurs/EconomieCollaborative/customReduceReducers.ts b/site/source/pages/Simulateurs/EconomieCollaborative/customReduceReducers.ts
index a0f674a3e..8b9690706 100644
--- a/site/source/pages/Simulateurs/EconomieCollaborative/customReduceReducers.ts
+++ b/site/source/pages/Simulateurs/EconomieCollaborative/customReduceReducers.ts
@@ -1,7 +1,6 @@
-import {
+import originalReduceReducers, {
 	Action as OriginalAction,
 	Reducer as OriginalReducer,
-	default as originalReduceReducers,
 } from 'reduce-reducers'
 
 type Reducer<S, A extends OriginalAction> = (state: S, action: A) => S
diff --git a/site/source/pages/Simulateurs/Page/index.tsx b/site/source/pages/Simulateurs/Page/index.tsx
index ee909b9b7..67d1345b9 100644
--- a/site/source/pages/Simulateurs/Page/index.tsx
+++ b/site/source/pages/Simulateurs/Page/index.tsx
@@ -51,7 +51,7 @@ export default function PageData(props: PageDataProps) {
 
 	const année = useContext(EngineContext).evaluate('année')
 		.nodeValue as Evaluation<number>
-	const year = typeof année === 'number' && année != 2022 ? ` - ${année}` : ''
+	const year = typeof année === 'number' && année !== 2022 ? ` - ${année}` : ''
 
 	const inIframe = useIsEmbedded()
 	useSimulationConfig(config)
diff --git a/site/source/redirects.tsx b/site/source/redirects.tsx
index bbe96bca7..0a2792f5c 100644
--- a/site/source/redirects.tsx
+++ b/site/source/redirects.tsx
@@ -15,5 +15,5 @@ export default (netlifyToml as { redirects: NetlifyRedirect[] }).redirects
 		from: decodeURIComponent(from.replace(/^:.*?\//, '/')),
 		to: decodeURIComponent(to.replace(/^:.*?\//, '/').replace(':splat', '*')),
 	}))
-	.filter(({ from, to }) => from != to)
+	.filter(({ from, to }) => from !== to)
 	.map((props) => <Redirect key={props.from} {...props} exact />)
diff --git a/site/source/reducers/companySituationReducer.ts b/site/source/reducers/companySituationReducer.ts
index a66019371..4b0a235cb 100644
--- a/site/source/reducers/companySituationReducer.ts
+++ b/site/source/reducers/companySituationReducer.ts
@@ -47,7 +47,7 @@ export function companySituation(state: Situation = {}, action: Action) {
 				'établissement . localisation': { objet: action.details },
 			}
 		case 'SET_SIMULATION':
-			state['entreprise . SIREN'] ? state : {}
+			return state['entreprise . SIREN'] ? state : {}
 	}
 
 	return state
diff --git a/site/source/utils.ts b/site/source/utils.ts
index 60be112f0..50cbf393e 100644
--- a/site/source/utils.ts
+++ b/site/source/utils.ts
@@ -137,8 +137,8 @@ export const wrapperDebounceEvents = <T>(
 
 				if (typeof original === 'function') {
 					const debouncedFunction = async (...params: unknown[]) => {
-						await new Promise((res) =>
-							setTimeout(() => res(original(...params)), ms)
+						await new Promise((resolve) =>
+							setTimeout(() => resolve(original(...params)), ms)
 						)
 					}
 
@@ -202,7 +202,7 @@ export async function getIframeOffset(): Promise<number> {
 			resolve(evt.data.value)
 		}
 		if (!window.parent.postMessage) {
-			reject('No parent window')
+			reject(new Error('No parent window'))
 		}
 		window.parent?.postMessage({ kind: 'get-offset' }, '*')
 		window.addEventListener('message', returnOffset)