diff --git a/components/versions/list-versions.js b/components/versions/list-versions.js
index c5d0bf4..d4485e5 100644
--- a/components/versions/list-versions.js
+++ b/components/versions/list-versions.js
@@ -80,7 +80,7 @@ function rowContent({
     })
 
     if (version) {
-      setVersionData(version)
+      setVersionData({...version, versionId})
       setIsOpenComparison(true)
     }
   }
diff --git a/components/versions/version-comparison.js b/components/versions/version-comparison.js
index 631440e..7fd4615 100644
--- a/components/versions/version-comparison.js
+++ b/components/versions/version-comparison.js
@@ -6,9 +6,63 @@ import PropTypes from 'prop-types'
 import IconButton from '@mui/material/IconButton'
 import ThumbUpIcon from '@mui/icons-material/ThumbUp'
 import ThumbDownIcon from '@mui/icons-material/ThumbDown'
+import {useState, useEffect} from 'react'
+import {useSession} from 'next-auth/react'
+import Snackbar from '@mui/material/Snackbar'
+import Alert from '@mui/material/Alert'
+import {handleVote, getUserVote} from '../../lib/directus.js'
 
 export default function VersionComparison({versionData}) {
   const {current, main, outdated} = versionData
+  const {data: session} = useSession()
+  const [snackbar, setSnackbar] = useState({open: false, message: '', severity: 'success'})
+  const [currentVote, setCurrentVote] = useState(null)
+
+  useEffect(() => {
+    const fetchVote = async () => {
+      if (session?.user && versionData.versionId) {
+        try {
+          const vote = await getUserVote({
+            accessToken: session.user.accessToken,
+            userId: session.user.userId,
+            versionId: versionData.versionId
+          })
+          setCurrentVote(vote)
+        } catch (error) {
+          console.error('Error fetching vote:', error)
+        }
+      }
+    }
+
+    fetchVote()
+  }, [session, versionData.versionId])
+
+  const handleVoteClick = async voteValue => {
+    try {
+      const newVoteValue = await handleVote({
+        accessToken: session.user.accessToken,
+        userId: session.user.userId,
+        versionId: versionData.versionId,
+        voteValue
+      })
+      setCurrentVote(newVoteValue)
+      setSnackbar({
+        open: true,
+        message: newVoteValue === null ? 'Vote annulé' : 'Vote enregistré avec succès',
+        severity: 'success'
+      })
+    } catch {
+      setSnackbar({
+        open: true,
+        message: 'Erreur lors du vote',
+        severity: 'error'
+      })
+    }
+  }
+
+  const handleCloseSnackbar = () => {
+    setSnackbar(prev => ({...prev, open: false}))
+  }
 
   return (
     <Box sx={{padding: 3}}>
@@ -25,12 +79,22 @@ export default function VersionComparison({versionData}) {
             <Typography variant='body1' sx={{color: outdated ? '#D32F2F' : '#1976D2', fontWeight: 'bold'}}>
               {current.contenu}
             </Typography>
-            {!outdated && (
+            {!outdated && session?.user && (
               <Box sx={{display: 'flex', justifyContent: 'flex-end', mt: 1}}>
-                <IconButton size='small' color='success' aria-label='vote positif'>
+                <IconButton
+                  size='small'
+                  color={currentVote === 1 ? 'success' : 'primary'}
+                  aria-label='vote positif'
+                  onClick={() => handleVoteClick(1)}
+                >
                   <ThumbUpIcon />
                 </IconButton>
-                <IconButton size='small' color='error' aria-label='vote négatif'>
+                <IconButton
+                  size='small'
+                  color={currentVote === -1 ? 'error' : 'primary'}
+                  aria-label='vote négatif'
+                  onClick={() => handleVoteClick(-1)}
+                >
                   <ThumbDownIcon />
                 </IconButton>
               </Box>
@@ -91,6 +155,16 @@ export default function VersionComparison({versionData}) {
           </Grid>
         </Grid>
       </Box>
+      <Snackbar
+        open={snackbar.open}
+        autoHideDuration={6000}
+        anchorOrigin={{vertical: 'bottom', horizontal: 'center'}}
+        onClose={handleCloseSnackbar}
+      >
+        <Alert variant='filled' severity={snackbar.severity} sx={{width: '100%'}} onClose={handleCloseSnackbar}>
+          {snackbar.message}
+        </Alert>
+      </Snackbar>
     </Box>
   )
 }
@@ -101,5 +175,6 @@ VersionComparison.propTypes = {
     mainHash: PropTypes.string.isRequired,
     current: PropTypes.object.isRequired,
     main: PropTypes.object.isRequired,
+    versionId: PropTypes.string
   }).isRequired,
 }
diff --git a/lib/directus.js b/lib/directus.js
index 5cf247c..6c411d4 100644
--- a/lib/directus.js
+++ b/lib/directus.js
@@ -2,7 +2,7 @@
 import {
   createDirectus, rest, authentication, withToken, createItem,
   readUser, createContentVersion, readContentVersions, saveToContentVersion,
-  readContentVersion,
+  readContentVersion, readItems, updateItem, deleteItem,
   compareContentVersion
 } from '@directus/sdk'
 import {signOut} from 'next-auth/react'
@@ -241,3 +241,100 @@ export async function createVersion({
     }
   }
 }
+
+export async function handleVote({
+  accessToken,
+  userId,
+  versionId,
+  voteValue
+}) {
+  try {
+    await handleUserStatus(accessToken, userId)
+
+    const existingVotes = await directusClient.request(
+      withToken(
+        accessToken,
+        readItems('votes', {
+          filter: {
+            _and: [
+              {content_version_id: {_eq: versionId}},
+              {user_created: {_eq: userId}}
+            ]
+          }
+        })
+      )
+    )
+
+    if (existingVotes && existingVotes.length > 0) {
+      const existingVote = existingVotes[0]
+
+      if (existingVote.vote === voteValue) {
+        await directusClient.request(
+          withToken(
+            accessToken,
+            deleteItem('votes', existingVote.id)
+          )
+        )
+        return null
+      }
+
+      const vote = {
+        content_version_id: versionId,
+        vote: voteValue
+      }
+
+      await directusClient.request(
+        withToken(
+          accessToken,
+          updateItem('votes', existingVote.id, vote)
+        )
+      )
+      return voteValue
+    }
+
+    const vote = {
+      content_version_id: versionId,
+      vote: voteValue
+    }
+
+    await directusClient.request(
+      withToken(
+        accessToken,
+        createItem('votes', vote)
+      )
+    )
+    return voteValue
+  } catch (error) {
+    console.error('Error voting:', error)
+    throw error
+  }
+}
+
+export async function getUserVote({
+  accessToken,
+  userId,
+  versionId
+}) {
+  try {
+    await handleUserStatus(accessToken, userId)
+
+    const existingVotes = await directusClient.request(
+      withToken(
+        accessToken,
+        readItems('votes', {
+          filter: {
+            _and: [
+              {content_version_id: {_eq: versionId}},
+              {user_created: {_eq: userId}}
+            ]
+          }
+        })
+      )
+    )
+
+    return existingVotes && existingVotes.length > 0 ? existingVotes[0].vote : null
+  } catch (error) {
+    console.error('Error fetching vote:', error)
+    throw error
+  }
+}