diff --git a/ExpressAPI/assets/OpenAPI/OpenAPI.yaml b/ExpressAPI/assets/OpenAPI/OpenAPI.yaml
index ba7dd032340c8fe43f9f642825bf16d7a1d80ca4..b5e4c6f16618b4e065c177bab57b516dd3e9e150 100644
--- a/ExpressAPI/assets/OpenAPI/OpenAPI.yaml
+++ b/ExpressAPI/assets/OpenAPI/OpenAPI.yaml
@@ -1,7 +1,7 @@
 openapi: 3.1.0
 info:
     title: Dojo API
-    version: 3.1.2
+    version: 3.1.3
     description: |
         **Backend API of the Dojo project.**
         
diff --git a/ExpressAPI/package.json b/ExpressAPI/package.json
index 037f615a6012c94191944def406ae123b36fd580..ad25538f7ae3b48611a3be7270654a8c390011ff 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"        : "3.1.2",
+    "version"        : "3.1.3",
     "license"        : "AGPLv3",
     "author"         : "Michaël Minelli <dojo@minelli.me>",
     "main"           : "dist/src/app.js",
diff --git a/ExpressAPI/src/routes/AssignmentRoutes.ts b/ExpressAPI/src/routes/AssignmentRoutes.ts
index 605bbc45ad29c13d9a2ff698ee93a86f34ba28ca..645104b41c1ff85f3c9e1609922529a01f6027b2 100644
--- a/ExpressAPI/src/routes/AssignmentRoutes.ts
+++ b/ExpressAPI/src/routes/AssignmentRoutes.ts
@@ -46,11 +46,11 @@ class AssignmentRoutes implements RoutesManager {
     };
 
     registerOnBackend(backend: Express) {
-        backend.get('/assignments/:assignmentNameOrUrl', SecurityMiddleware.check(true), this.getAssignment);
-        backend.post('/assignments', SecurityMiddleware.check(true, SecurityCheckType.TEACHING_STAFF), ParamsValidatorMiddleware.validate(this.assignmentValidator), this.createAssignment);
+        backend.get('/assignments/:assignmentNameOrUrl', SecurityMiddleware.check(true), this.getAssignment.bind(this));
+        backend.post('/assignments', SecurityMiddleware.check(true, SecurityCheckType.TEACHING_STAFF), ParamsValidatorMiddleware.validate(this.assignmentValidator), this.createAssignment.bind(this));
 
-        backend.patch('/assignments/:assignmentNameOrUrl/publish', SecurityMiddleware.check(true, SecurityCheckType.ASSIGNMENT_STAFF), this.publishAssignment);
-        backend.patch('/assignments/:assignmentNameOrUrl/unpublish', SecurityMiddleware.check(true, SecurityCheckType.ASSIGNMENT_STAFF), this.unpublishAssignment);
+        backend.patch('/assignments/:assignmentNameOrUrl/publish', SecurityMiddleware.check(true, SecurityCheckType.ASSIGNMENT_STAFF), this.publishAssignment.bind(this));
+        backend.patch('/assignments/:assignmentNameOrUrl/unpublish', SecurityMiddleware.check(true, SecurityCheckType.ASSIGNMENT_STAFF), this.unpublishAssignment.bind(this));
     }
 
     // Get an assignment by its name or gitlab url
diff --git a/ExpressAPI/src/routes/BaseRoutes.ts b/ExpressAPI/src/routes/BaseRoutes.ts
index c0ac80aa491060937f3c309fd52c314f18144fe7..474f5bbbe6a7a1a0e28a120c52ebea8cd501e410 100644
--- a/ExpressAPI/src/routes/BaseRoutes.ts
+++ b/ExpressAPI/src/routes/BaseRoutes.ts
@@ -6,8 +6,8 @@ import RoutesManager   from '../express/RoutesManager';
 
 class BaseRoutes implements RoutesManager {
     registerOnBackend(backend: Express) {
-        backend.get('/', this.homepage);
-        backend.get('/health_check', this.healthCheck);
+        backend.get('/', this.homepage.bind(this));
+        backend.get('/health_check', this.healthCheck.bind(this));
     }
 
     private async homepage(req: express.Request, res: express.Response) {
diff --git a/ExpressAPI/src/routes/GitlabRoutes.ts b/ExpressAPI/src/routes/GitlabRoutes.ts
index 009052705080b3cebe8f9971f4f49bbac6d0d7f2..2f4affb7a12eb72ab9c5bd927994f5aac7c60c16 100644
--- a/ExpressAPI/src/routes/GitlabRoutes.ts
+++ b/ExpressAPI/src/routes/GitlabRoutes.ts
@@ -8,7 +8,7 @@ import GitlabManager      from '../managers/GitlabManager';
 
 class GitlabRoutes implements RoutesManager {
     registerOnBackend(backend: Express) {
-        backend.get('/gitlab/project/:gitlabProjectIdOrNamespace/checkTemplateAccess', SecurityMiddleware.check(true, SecurityCheckType.TEACHING_STAFF), this.checkTemplateAccess);
+        backend.get('/gitlab/project/:gitlabProjectIdOrNamespace/checkTemplateAccess', SecurityMiddleware.check(true, SecurityCheckType.TEACHING_STAFF), this.checkTemplateAccess.bind(this));
     }
 
     private async checkTemplateAccess(req: express.Request, res: express.Response) {
diff --git a/ExpressAPI/src/routes/SessionRoutes.ts b/ExpressAPI/src/routes/SessionRoutes.ts
index a5bd42f18851e66b469cf4d66591f5a2dd9f9ad5..60b630d9fcf37254f4f068acc0272265ca149d1c 100644
--- a/ExpressAPI/src/routes/SessionRoutes.ts
+++ b/ExpressAPI/src/routes/SessionRoutes.ts
@@ -32,9 +32,9 @@ class SessionRoutes implements RoutesManager {
     };
 
     registerOnBackend(backend: Express) {
-        backend.post('/login', ParamsValidatorMiddleware.validate(this.loginValidator), this.login);
-        backend.post('/refresh_tokens', ParamsValidatorMiddleware.validate(this.refreshTokensValidator), this.refreshTokens);
-        backend.get('/test_session', SecurityMiddleware.check(true), this.testSession);
+        backend.post('/login', ParamsValidatorMiddleware.validate(this.loginValidator), this.login.bind(this));
+        backend.post('/refresh_tokens', ParamsValidatorMiddleware.validate(this.refreshTokensValidator), this.refreshTokens.bind(this));
+        backend.get('/test_session', SecurityMiddleware.check(true), this.testSession.bind(this));
     }
 
     private async login(req: express.Request, res: express.Response) {