diff --git a/openapi.yml b/openapi.yml
index 11ea81a..7cbf550 100644
--- a/openapi.yml
+++ b/openapi.yml
@@ -39,6 +39,7 @@ paths:
             application/json:
               schema:
                 $ref: "#/components/schemas/HelloResponse"
+
   /signing-request/{id}:
     get:
       tags:
@@ -71,6 +72,41 @@ paths:
             application/json:
               schema:
                 $ref: "#/components/schemas/ErrorResponse"
+
+  /signing-request-document/{id}:
+    patch:
+      tags:
+        - signing-request-document
+      summary: Change some data in a signing request document
+      operationId: patchSigningRequestDocument
+      parameters:
+        - name: id
+          in: path
+          required: true
+          description: The ID of the signing request document
+          schema:
+            type: string
+      requestBody:
+        content:
+          application/json:
+            schema:
+              $ref: "#/components/schemas/PatchSigningRequestDocumentRequest"
+      responses:
+        204:
+          description: "Signing request document was patched"
+        401:
+          description: "Unauthorized"
+          content:
+            application/json:
+              schema:
+                $ref: "#/components/schemas/ErrorResponse"
+        404:
+          description: "Signing request document was not found"
+          content:
+            application/json:
+              schema:
+                $ref: "#/components/schemas/ErrorResponse"
+
   /signing-request-document/{id}/data:
     get:
       tags:
@@ -180,6 +216,20 @@ components:
         confirmed:
           type: boolean
 
+    PatchSigningRequestDocumentRequest:
+      type: object
+      required:
+        - op
+        - path
+        - value
+      properties:
+        op:
+          type: string
+        path:
+          type: string
+        value:
+          type: string
+
     ErrorResponse:
       type: object
       required:
diff --git a/pom.xml b/pom.xml
index 7ccbbb4..d327bfe 100644
--- a/pom.xml
+++ b/pom.xml
@@ -94,7 +94,11 @@
             <version>0.11.5</version>
             <scope>runtime</scope>
         </dependency>
-
+        <dependency>
+            <groupId>com.github.java-json-tools</groupId>
+            <artifactId>json-patch</artifactId>
+            <version>1.13</version>
+        </dependency>
 
         <dependency>
             <groupId>org.projectlombok</groupId>
diff --git a/src/main/java/ch/dlmw/swisssignchallenge/controllers/SigningRequestDocumentController.java b/src/main/java/ch/dlmw/swisssignchallenge/controllers/SigningRequestDocumentController.java
new file mode 100644
index 0000000..23d6725
--- /dev/null
+++ b/src/main/java/ch/dlmw/swisssignchallenge/controllers/SigningRequestDocumentController.java
@@ -0,0 +1,20 @@
+package ch.dlmw.swisssignchallenge.controllers;
+
+import ch.dlmw.swisssignchallenge.services.SigningRequestDocumentService;
+import lombok.AllArgsConstructor;
+import org.openapitools.api.SigningRequestDocumentApi;
+import org.openapitools.model.PatchSigningRequestDocumentRequest;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@AllArgsConstructor
+public class SigningRequestDocumentController implements SigningRequestDocumentApi {
+    private final SigningRequestDocumentService signingRequestDocumentService;
+
+    @Override
+    public ResponseEntity<Void> patchSigningRequestDocument(String id, PatchSigningRequestDocumentRequest patchSigningRequestDocumentRequest) {
+        signingRequestDocumentService.patchSigningRequestDocument(id, patchSigningRequestDocumentRequest);
+        return ResponseEntity.noContent().build();
+    }
+}
diff --git a/src/main/java/ch/dlmw/swisssignchallenge/filters/JwtRequestFilter.java b/src/main/java/ch/dlmw/swisssignchallenge/filters/JwtRequestFilter.java
index b52edac..3f326ef 100644
--- a/src/main/java/ch/dlmw/swisssignchallenge/filters/JwtRequestFilter.java
+++ b/src/main/java/ch/dlmw/swisssignchallenge/filters/JwtRequestFilter.java
@@ -63,8 +63,8 @@ public class JwtRequestFilter extends OncePerRequestFilter {
             filterChain.doFilter(request, response);
         } catch (Exception e) {
             response.setContentType("application/json");
-            response.setStatus(HttpStatus.BAD_REQUEST.value());
-            response.getWriter().write(objectMapper.writeValueAsString(new ErrorResponse("Couldn't authenticate", HttpStatus.BAD_REQUEST.value())));
+            response.setStatus(HttpStatus.UNAUTHORIZED.value());
+            response.getWriter().write(objectMapper.writeValueAsString(new ErrorResponse("Couldn't authenticate", HttpStatus.UNAUTHORIZED.value())));
         }
     }
 
diff --git a/src/main/java/ch/dlmw/swisssignchallenge/services/SigningRequestDocumentService.java b/src/main/java/ch/dlmw/swisssignchallenge/services/SigningRequestDocumentService.java
new file mode 100644
index 0000000..7e2a59f
--- /dev/null
+++ b/src/main/java/ch/dlmw/swisssignchallenge/services/SigningRequestDocumentService.java
@@ -0,0 +1,7 @@
+package ch.dlmw.swisssignchallenge.services;
+
+import org.openapitools.model.PatchSigningRequestDocumentRequest;
+
+public interface SigningRequestDocumentService {
+    void patchSigningRequestDocument(String id, PatchSigningRequestDocumentRequest patchSigningRequestDocumentRequest);
+}
diff --git a/src/main/java/ch/dlmw/swisssignchallenge/services/impl/SigningRequestDocumentServiceImpl.java b/src/main/java/ch/dlmw/swisssignchallenge/services/impl/SigningRequestDocumentServiceImpl.java
new file mode 100644
index 0000000..ece174c
--- /dev/null
+++ b/src/main/java/ch/dlmw/swisssignchallenge/services/impl/SigningRequestDocumentServiceImpl.java
@@ -0,0 +1,24 @@
+package ch.dlmw.swisssignchallenge.services.impl;
+
+import ch.dlmw.swisssignchallenge.repositories.SigningRequestDocumentRepository;
+import ch.dlmw.swisssignchallenge.services.SigningRequestDocumentService;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import lombok.AllArgsConstructor;
+import org.openapitools.model.PatchSigningRequestDocumentRequest;
+import org.springframework.stereotype.Service;
+
+import java.util.UUID;
+
+@Service
+@AllArgsConstructor
+public class SigningRequestDocumentServiceImpl implements SigningRequestDocumentService {
+    private final SigningRequestDocumentRepository signingRequestDocumentRepository;
+    private final ObjectMapper objectMapper;
+
+    @Override
+    public void patchSigningRequestDocument(String id, PatchSigningRequestDocumentRequest patchSigningRequestDocumentRequest) {
+        var document = signingRequestDocumentRepository.findById(UUID.fromString(id)).orElseThrow();
+
+        System.out.println(document.isConfirmed());
+    }
+}