diff --git a/client/src/components/Playground.vue b/client/src/components/Playground.vue
index 7638b4d..b0d1f43 100644
--- a/client/src/components/Playground.vue
+++ b/client/src/components/Playground.vue
@@ -2,9 +2,9 @@
   <div class="playground__container">
     <div class="playground__area">
       <div class="playground__sources" :class="{ 'playground__sources__show': showSources }">
-        <SourceCard v-for="source in sources" :key="source.id" :source="source" :selectable="selectable"
+        <SourceCard v-for="(source, index) in sources" :key="source.id" :source="source" :selectable="selectable"
           :selected="selection == source.id" @click="selectSource(source)" :badge="badgeMap[source.id]"
-          :disabled="disabledMap[source.id]" />
+          :disabled="disabledMap[source.id]" :index="index" />
       </div>
       <div class="playground__spacer" />
       <div class="playground__quote" :class="{ 'playground__quote__show': showQuote}">
@@ -36,7 +36,8 @@ const sources = round.sources as Sources
 
 const { saveSelection } = useEngine()
 const selection = ref('')
-const selectable = computed(() => game.phase === 'select-quote' && !selection.value && !round.selections[useUserinfoStore().id])
+const { id } = useUserinfoStore()
+const selectable = computed(() => game.phase === 'select-quote' && !selection.value && !round.selections[id])
 const selectSource = async (source: Source): Promise<void> => {
   if (selectable.value) {
     await saveSelection(source.id)
@@ -50,7 +51,7 @@ const showSources = computed(() => ['select-quote', 'reveal-show-count', 'reveal
 const showQuote = showSources
 const showSkipButton = computed(() => game.phase === 'select-quote')
 const badgeMap = computed(() => {
-  const badgeMap = {}
+  const badgeMap = {} as { [key: string]: number}
   if (game.phase === 'reveal-show-count') {
     for (const id in round.revelation.votes) {
       badgeMap[id] = round.revelation.votes[id].length
@@ -60,7 +61,7 @@ const badgeMap = computed(() => {
 })
 
 const disabledMap = computed(() => {
-  const disabledMap = {}
+  const disabledMap = {} as { [key: string]: boolean}
   if (game.phase === 'reveal-source') {
     for (const id in round.revelation.sources) {
       disabledMap[id] = !round.revelation.sources[id]
diff --git a/client/src/components/SourceCard.vue b/client/src/components/SourceCard.vue
index 8dbac07..f1c522c 100644
--- a/client/src/components/SourceCard.vue
+++ b/client/src/components/SourceCard.vue
@@ -15,6 +15,7 @@ import type { Source } from '@/composables/engine.d'
 
 const props = defineProps<{
   source: Source,
+  index: number,
   selectable?: boolean,
   selected?: boolean,
   badge?: number,
diff --git a/client/src/composables/engine.d.ts b/client/src/composables/engine.d.ts
index 52bd7bb..81db37c 100644
--- a/client/src/composables/engine.d.ts
+++ b/client/src/composables/engine.d.ts
@@ -35,12 +35,10 @@ export type Source = {
 
 export type Sources = Array<Source>
 
-export type Selection = {
-  id: string
+export type Selections = {
+  [key: string]: boolean
 }
 
-export type Selections = Array<Selection>
-
 export type RevelationVotes = {
   [key: string]: Array<string>
 }
diff --git a/client/src/stores/RoundStore.ts b/client/src/stores/RoundStore.ts
index 4da06e8..7052588 100644
--- a/client/src/stores/RoundStore.ts
+++ b/client/src/stores/RoundStore.ts
@@ -7,7 +7,7 @@ export const useRoundStore = defineStore('RoundStore', {
       round: {
         quote: '',
         sources: [] as Sources,
-        selections: [] as Selections,
+        selections: {} as Selections,
         revelation: {
           votes: {} as RevelationVotes,
           sources: {} as RevelationSources,
@@ -20,7 +20,7 @@ export const useRoundStore = defineStore('RoundStore', {
       round = round || {} as Round
       this.round.quote = round.quote || ''
       this.round.sources = round.sources || [] as Sources
-      this.round.selections = round.selections || [] as Selections
+      this.round.selections = round.selections || {} as Selections
       this.round.revelation.votes = round.revelation?.votes || {} as RevelationVotes
       this.round.revelation.sources = round.revelation?.sources || {} as RevelationSources
     },