diff --git a/app/views/contests/offline_edit.html.slim b/app/views/contests/offline_edit.html.slim
index f32b07e..edaa24e 100644
--- a/app/views/contests/offline_edit.html.slim
+++ b/app/views/contests/offline_edit.html.slim
@@ -25,7 +25,7 @@
         function setMaxUploadSize() {
           const el = document.querySelector('input[type="file"]');
           el.onchange = function() {
-            if(this.files[0].size > 2 * 1024 * 1024) {
+            if(this.files[0].size > 5.3 * 1024 * 1024) {
               document.getElementById('image-error-message').style.display = 'block';
               this.value = "";
             } else {
diff --git a/app/views/contests/offline_new.html.slim b/app/views/contests/offline_new.html.slim
index 8e8ac3e..07c3b83 100644
--- a/app/views/contests/offline_new.html.slim
+++ b/app/views/contests/offline_new.html.slim
@@ -15,7 +15,7 @@
         function setMaxUploadSize() {
           const el = document.querySelector('input[type="file"]');
           el.onchange = function() {
-            if(this.files[0].size > 2 * 1024 * 1024) {
+            if(this.files[0].size > 5.3 * 1024 * 1024) {
               document.getElementById('image-error-message').style.display = 'block';
               this.value = "";
             } else {
diff --git a/app/views/puzzles/_form.html.slim b/app/views/puzzles/_form.html.slim
index 76ac9f2..677858c 100644
--- a/app/views/puzzles/_form.html.slim
+++ b/app/views/puzzles/_form.html.slim
@@ -31,7 +31,7 @@
         function setMaxUploadSize() {
           const el = document.querySelector('input[type="file"]');
           el.onchange = function() {
-            if(this.files[0].size > 2 * 1024 * 1024) {
+            if(this.files[0].size > 5.3 * 1024 * 1024) {
               document.getElementById('image-error-message').style.display = 'block';
               this.value = "";
             } else {
diff --git a/config/locales/en.yml b/config/locales/en.yml
index e22d100..678ad61 100644
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -267,7 +267,7 @@ en:
       title: Edit contest puzzle
     form:
       fake_data_recommendation: It is recommended to first enter a fake name and image, and to use the real ones only once the contest starts.
-      file_too_big: File too big! Maximum allowed size is 2M
+      file_too_big: File too big! Maximum allowed size is 5M
     image_select: Select an image
     new:
       notice: Puzzle added
diff --git a/config/locales/fr.yml b/config/locales/fr.yml
index 12950e8..429a344 100644
--- a/config/locales/fr.yml
+++ b/config/locales/fr.yml
@@ -238,7 +238,7 @@ fr:
       title: Modifier le puzzle
     form:
       fake_data_recommendation: Il est recommendé d'entrer de faux noms et images, et de mettre les vrais uniquement quand le concours démarre.
-      file_too_big: La taille de l'image dépasse la taille maximum autorisée de 2M
+      file_too_big: La taille de l'image dépasse la taille maximum autorisée de 5M
     image_select: Choisis une image
     new:
       notice: Puzzle ajouté