diff --git a/source/actions/actions.js b/source/actions/actions.js
index 6f330e6237..4b72f2cacc 100644
--- a/source/actions/actions.js
+++ b/source/actions/actions.js
@@ -67,6 +67,13 @@ export const updateSituation = (fieldName, value) => ({
 	value
 })
 
+export const updatePeriod = toPeriod => (dispatch, getState) =>
+	dispatch({
+		type: 'UPDATE_PERIOD',
+		rules: getState().rules,
+		toPeriod
+	})
+
 // $FlowFixMe
 export function setExample(name, situation, dottedName) {
 	return { type: 'SET_EXAMPLE', name, situation, dottedName }
diff --git a/source/components/PeriodSwitch.js b/source/components/PeriodSwitch.js
index e0225cc412..34bba977d8 100644
--- a/source/components/PeriodSwitch.js
+++ b/source/components/PeriodSwitch.js
@@ -1,3 +1,4 @@
+import { updatePeriod } from 'Actions/actions'
 import React from 'react'
 import { Trans } from 'react-i18next'
 import { useDispatch, useSelector } from 'react-redux'
@@ -12,10 +13,9 @@ export default function PeriodSwitch() {
 	)
 	const currentPeriod = situation.période
 	let periods = ['année', 'mois']
-	const updatePeriod = toPeriod => dispatch({ type: 'UPDATE_PERIOD', toPeriod })
 
 	if (!currentPeriod) {
-		updatePeriod(defaultPeriod)
+		dispatch(updatePeriod(defaultPeriod))
 	}
 
 	return (
@@ -27,7 +27,7 @@ export default function PeriodSwitch() {
 							name="période"
 							type="radio"
 							value={period}
-							onChange={() => updatePeriod(period)}
+							onChange={() => dispatch(updatePeriod(period))}
 							checked={currentPeriod === period}
 						/>
 						<span>
diff --git a/source/reducers/rootReducer.js b/source/reducers/rootReducer.js
index a5cc2cd370..c014935ed1 100644
--- a/source/reducers/rootReducer.js
+++ b/source/reducers/rootReducer.js
@@ -201,26 +201,20 @@ const existingCompanyReducer = (state, action) => {
 	}
 	return newState
 }
-export default (state, action) => {
-	// Enrich the action
-	if (action.type === 'UPDATE_PERIOD') {
-		action.rules = state.rules
-	}
-	return reduceReducers(
-		existingCompanyReducer,
-		storageReducer,
-		combineReducers({
-			sessionId: defaultTo(Math.floor(Math.random() * 1000000000000) + ''),
-			conversationSteps,
-			lang,
-			rules: defaultTo(null),
-			simulation,
-			explainedVariable,
-			previousSimulation: defaultTo(null),
-			currentExample,
-			situationBranch,
-			activeTargetInput,
-			inFranceApp: inFranceAppReducer
-		})
-	)(state, action)
-}
+export default reduceReducers(
+	existingCompanyReducer,
+	storageReducer,
+	combineReducers({
+		sessionId: defaultTo(Math.floor(Math.random() * 1000000000000) + ''),
+		conversationSteps,
+		lang,
+		rules: defaultTo(null),
+		simulation,
+		explainedVariable,
+		previousSimulation: defaultTo(null),
+		currentExample,
+		situationBranch,
+		activeTargetInput,
+		inFranceApp: inFranceAppReducer
+	})
+)