diff --git a/src/api-keys/api-keys.spec.ts b/src/api-keys/api-keys.spec.ts
index f7229a194..c9a531664 100644
--- a/src/api-keys/api-keys.spec.ts
+++ b/src/api-keys/api-keys.spec.ts
@@ -64,6 +64,7 @@ describe('ApiKeys', () => {
             type: 'user',
             id: 'user_01H5JQDV7R7ATEYZDEG0W5PRYS',
             organizationId: 'org_01H5JQDV7R7ATEYZDEG0W5PRYS',
+            organization_id: 'org_01H5JQDV7R7ATEYZDEG0W5PRYS',
           },
           name: 'Test User Api Key',
           obfuscatedValue: 'sk_…PRYS',
diff --git a/src/api-keys/interfaces/api-key.interface.ts b/src/api-keys/interfaces/api-key.interface.ts
index 15444eb1d..64283f29d 100644
--- a/src/api-keys/interfaces/api-key.interface.ts
+++ b/src/api-keys/interfaces/api-key.interface.ts
@@ -14,6 +14,11 @@ export interface ApiKey {
         type: 'user';
         id: string;
         organizationId: string;
+        /**
+         * @deprecated Use `organizationId`. Retained for compatibility with
+         * releases before 10.8.0, which returned the raw API field name.
+         */
+        organization_id?: string;
       };
   /** A descriptive name for the API Key. */
   name: string;
diff --git a/src/api-keys/serializers/api-key.serializer.ts b/src/api-keys/serializers/api-key.serializer.ts
index 3b924bbb9..0ccbbca3a 100644
--- a/src/api-keys/serializers/api-key.serializer.ts
+++ b/src/api-keys/serializers/api-key.serializer.ts
@@ -10,6 +10,7 @@ export function deserializeApiKey(apiKey: SerializedApiKey): ApiKey {
             type: 'user',
             id: apiKey.owner.id,
             organizationId: apiKey.owner.organization_id,
+            organization_id: apiKey.owner.organization_id,
           }
         : apiKey.owner,
     name: apiKey.name,