diff --git a/backend/locked.go b/backend/locked.go
new file mode 100644
index 00000000..697754d8
--- /dev/null
+++ b/backend/locked.go
@@ -0,0 +1,30 @@
+package main
+
+import (
+	"encoding/json"
+	"log"
+	"os"
+
+	"srs.epita.fr/fic-server/libfic"
+)
+
+var TeamLockedExercices = map[int64]map[string]bool{}
+
+func treatLocked(pathname string, team *fic.Team) {
+	fd, err := os.Open(pathname)
+	if err != nil {
+		log.Printf("[ERR] Unable to open %q: %s", pathname, err)
+		return
+	}
+
+	var locked map[string]bool
+
+	jdec := json.NewDecoder(fd)
+	if err := jdec.Decode(&locked); err != nil {
+		log.Printf("[ERR] Unable to parse JSON %q: %s", pathname, err)
+		return
+	}
+
+	TeamLockedExercices[team.Id] = locked
+	log.Printf("Team %q (tid=%d) has locked %d exercices", team.Name, team.Id, len(locked))
+}
diff --git a/frontend/ui/src/lib/components/ExerciceFlags.svelte b/frontend/ui/src/lib/components/ExerciceFlags.svelte
index 6aae5cfa..5d306d3e 100644
--- a/frontend/ui/src/lib/components/ExerciceFlags.svelte
+++ b/frontend/ui/src/lib/components/ExerciceFlags.svelte
@@ -25,6 +25,7 @@
 
  export let exercice = { };
  export let flags = [];
+ export let readonly = false;
 
  function waitDiff(i) {
      my.refresh((my) => {
@@ -224,7 +225,7 @@
                         type="submit"
                         color="danger"
                         id="submission-{exercice.id}"
-                        disabled={submitInProgress || $settings.disablesubmitbutton}
+                        disabled={submitInProgress || $settings.disablesubmitbutton || readonly}
                     >
                         {#if submitInProgress}
                             <Spinner size="sm" class="me-2" />
@@ -233,6 +234,8 @@
                     </Button>
                     {#if $settings.disablesubmitbutton}
                         <span class="text-muted">{$settings.disablesubmitbutton}</span>
+                    {:else if readonly}
+                        <span class="text-muted">Ce défi est désactivé</span>
                     {/if}
 		</div>
             </form>
diff --git a/frontend/ui/src/routes/[theme]/[exercice]/+page.svelte b/frontend/ui/src/routes/[theme]/[exercice]/+page.svelte
index d2461c6d..c7663314 100644
--- a/frontend/ui/src/routes/[theme]/[exercice]/+page.svelte
+++ b/frontend/ui/src/routes/[theme]/[exercice]/+page.svelte
@@ -218,6 +218,7 @@
                         exercice={$my.exercices[$current_exercice.id]}
                         bind:forcesolved={solved[$current_exercice.id]}
                         flags={$my.exercices[$current_exercice.id].flags}
+                        readonly={$current_exercice.disabled}
                     />
                 {/if}
             {/if}
diff --git a/libfic/team_my.go b/libfic/team_my.go
index 507ca97a..42912df3 100644
--- a/libfic/team_my.go
+++ b/libfic/team_my.go
@@ -66,6 +66,7 @@ type myTeamMCQJustifiedChoice struct {
 }
 type myTeamExercice struct {
 	ThemeId    int64        `json:"theme_id"`
+	Disabled   bool         `json:"disabled,omitempty"`
 	WIP        bool         `json:"wip,omitempty"`
 	Statement  string       `json:"statement"`
 	Overview   string       `json:"overview,omitempty"`
@@ -123,6 +124,7 @@ func MyJSONTeam(t *Team, started bool) (interface{}, error) {
 		for _, e := range exos {
 			if t == nil || (!e.Disabled && t.HasAccess(e)) {
 				exercice := myTeamExercice{}
+				exercice.Disabled = e.Disabled
 				exercice.WIP = e.WIP
 				exercice.ThemeId = e.IdTheme