diff --git a/config/api/vis-api.yaml b/config/api/vis-api.yaml
index e5b565e6a7e7c03e55b9e11c0f2c5f14770bb60c..292f64ddae0895cb03a0b643108b1a3629a8bb7c 100644
--- a/config/api/vis-api.yaml
+++ b/config/api/vis-api.yaml
@@ -170,7 +170,7 @@ paths:
             example:
               msgContent: 'Hello World'
               msgEncodeFormat: 'base64'
-              msgType: '1'
+              msgType: 1
               stdOrganization: 'ETSI'
       responses:
         '204':
@@ -253,8 +253,8 @@ paths:
               filterCriteria:
                 stdOrganization: 'ETSI'
                 msgType:
-                  - 1
-                  - 2
+                  - "1"
+                  - "2"
               expiryDeadline:
                 seconds: 1977836800
                 nanoseconds: 0
@@ -278,8 +278,8 @@ paths:
                 filterCriteria:
                   stdOrganization: 'ETSI'
                   msgType:
-                    - 1
-                    - 2
+                    - "1"
+                    - "2"
                 expiryDeadline:
                   seconds: 1977836800
                   nanoseconds: 0
@@ -358,8 +358,8 @@ paths:
                 filterCriteria:
                   stdOrganization: 'ETSI'
                   msgType:
-                    - 1
-                    - 2
+                    - "1"
+                    - "2"
                 expiryDeadline:
                   seconds: 1977836800
                   nanoseconds: 0
@@ -401,8 +401,8 @@ paths:
               filterCriteria:
                 stdOrganization: 'ETSI'
                 msgType:
-                  - 1
-                  - 2
+                  - "3"
+                  - "4"
               expiryDeadline:
                 seconds: 1977836800
                 nanoseconds: 0
@@ -427,8 +427,8 @@ paths:
                   filterCriteria:
                     stdOrganization: 'ETSI'
                     msgType:
-                      - 1
-                      - 2
+                      - "3"
+                      - "4"
                   expiryDeadline:
                     seconds: 1977836800
                     nanoseconds: 0