diff --git a/ExpressAPI/assets/OpenAPI/OpenAPI.yaml b/ExpressAPI/assets/OpenAPI/OpenAPI.yaml
index fee35461e1d1d720ce2bd30c6c5d30f00ab206c3..f9568c0cb9c961aa59b63534a7ae6c62e15e5b80 100644
--- a/ExpressAPI/assets/OpenAPI/OpenAPI.yaml
+++ b/ExpressAPI/assets/OpenAPI/OpenAPI.yaml
@@ -530,7 +530,7 @@ components:
         ExerciseChecker_Secret:
             type: apiKey
             in: header
-            name: ExerciseSecret
+            name: exercisesecret
     parameters:
         gitlabProjectIdOrNamespace:
             name: gitlabProjectIdOrNamespace
diff --git a/ExpressAPI/package.json b/ExpressAPI/package.json
index 684443b6fd95c7513266e8d0c949302f5ab5873d..40101b7c03f711ede3127b6c7bcf86eeccbc5429 100644
--- a/ExpressAPI/package.json
+++ b/ExpressAPI/package.json
@@ -1,7 +1,7 @@
 {
     "name"           : "dojo_backend_api",
     "description"    : "Backend API of the Dojo project",
-    "version"        : "3.1.0",
+    "version"        : "3.1.1",
     "license"        : "AGPLv3",
     "author"         : "Michaël Minelli <dojo@minelli.me>",
     "main"           : "dist/src/app.js",
diff --git a/ExpressAPI/src/middlewares/SecurityMiddleware.ts b/ExpressAPI/src/middlewares/SecurityMiddleware.ts
index ec5f3888910e42e5a010f5657bc97229c5f209d4..f7e807081162bf0a0429daf8c5172dcada2de2ee 100644
--- a/ExpressAPI/src/middlewares/SecurityMiddleware.ts
+++ b/ExpressAPI/src/middlewares/SecurityMiddleware.ts
@@ -31,7 +31,7 @@ class SecurityMiddleware {
                                 isAllowed = isAllowed || (req.boundParams.assignment?.published ?? false);
                                 break;
                             case SecurityCheckType.EXERCISE_SECRET:
-                                isAllowed = isAllowed || (req.headers.ExerciseSecret as string | undefined) === req.boundParams.exercise!.secret;
+                                isAllowed = isAllowed || (req.headers.exercisesecret as string | undefined) === req.boundParams.exercise!.secret;
                                 break;
                             default:
                                 break;