diff --git a/packages/backend-common/config.d.ts b/packages/backend-common/config.d.ts
index 3fd886874e..e5b193c543 100644
--- a/packages/backend-common/config.d.ts
+++ b/packages/backend-common/config.d.ts
@@ -77,17 +77,17 @@ export interface Config {
        */
       connection:
         | string
-        | Partial<{
+        | {
             /**
              * Password that belongs to the client User
              * @visibility secret
              */
-            password: string;
+            password?: string;
             /**
              * Other connection settings
              */
             [key: string]: unknown;
-          }>;
+          };
       /** Database name prefix override */
       prefix?: string;
       /**
diff --git a/plugins/jenkins-backend/config.d.ts b/plugins/jenkins-backend/config.d.ts
index 5b725dd801..1773ea7e75 100644
--- a/plugins/jenkins-backend/config.d.ts
+++ b/plugins/jenkins-backend/config.d.ts
@@ -42,13 +42,13 @@ export interface Config {
       username: string;
       /** @visibility secret */
       apiKey: string;
-      extraRequestHeaders?: Partial<{
+      extraRequestHeaders?: {
         /** @visibility secret */
-        Authorization: string;
+        Authorization?: string;
         /** @visibility secret */
-        authorization: string;
-        [key: string]: string;
-      }>;
+        authorization?: string;
+        [key: string]: string | undefined;
+      };
     }[];
   };
 }
diff --git a/plugins/proxy-backend/config.d.ts b/plugins/proxy-backend/config.d.ts
index 410ff86a2e..bc9cf7765a 100644
--- a/plugins/proxy-backend/config.d.ts
+++ b/plugins/proxy-backend/config.d.ts
@@ -31,17 +31,17 @@ export interface Config {
           /**
            * Object with extra headers to be added to target requests.
            */
-          headers?: Partial<{
+          headers?: {
             /** @visibility secret */
-            Authorization: string;
+            Authorization?: string;
             /** @visibility secret */
-            authorization: string;
+            authorization?: string;
             /** @visibility secret */
-            'X-Api-Key': string;
+            'X-Api-Key'?: string;
             /** @visibility secret */
-            'x-api-key': string;
-            [key: string]: string;
-          }>;
+            'x-api-key'?: string;
+            [key: string]: string | undefined;
+          };
           /**
            * Changes the origin of the host header to the target URL. Default: true.
            */