diff --git a/.changeset/strong-carrots-invent.md b/.changeset/strong-carrots-invent.md
new file mode 100644
index 0000000000..acad0c196e
--- /dev/null
+++ b/.changeset/strong-carrots-invent.md
@@ -0,0 +1,6 @@
+---
+"app-builder-lib": patch
+"electron-updater": patch
+---
+
+Pin Keygen publisher/updater integration to API version v1.0.
diff --git a/packages/app-builder-lib/src/publish/KeygenPublisher.ts b/packages/app-builder-lib/src/publish/KeygenPublisher.ts
index 3ad121a4f7..6f17d8d474 100644
--- a/packages/app-builder-lib/src/publish/KeygenPublisher.ts
+++ b/packages/app-builder-lib/src/publish/KeygenPublisher.ts
@@ -59,6 +59,7 @@ export class KeygenPublisher extends HttpPublisher {
       headers: {
         Accept: "application/vnd.api+json",
         "Content-Length": dataLength,
+        "Keygen-Version": "1.0",
       },
     }
     await httpExecutor.doApiRequest(configureRequestOptions(upload, this.auth, "PUT"), this.context.cancellationToken, requestProcessor)
@@ -72,6 +73,7 @@ export class KeygenPublisher extends HttpPublisher {
       headers: {
         "Content-Type": "application/vnd.api+json",
         Accept: "application/vnd.api+json",
+        "Keygen-Version": "1.0",
       },
     }
     const data = {
@@ -105,6 +107,7 @@ export class KeygenPublisher extends HttpPublisher {
       path: `${this.basePath}/${releaseId}`,
       headers: {
         Accept: "application/vnd.api+json",
+        "Keygen-Version": "1.0",
       },
     }
     await httpExecutor.request(configureRequestOptions(req, this.auth, "DELETE"), this.context.cancellationToken)
diff --git a/packages/electron-updater/src/providers/KeygenProvider.ts b/packages/electron-updater/src/providers/KeygenProvider.ts
index c840a5742d..97b24961bd 100644
--- a/packages/electron-updater/src/providers/KeygenProvider.ts
+++ b/packages/electron-updater/src/providers/KeygenProvider.ts
@@ -28,6 +28,7 @@ export class KeygenProvider extends Provider<UpdateInfo> {
         channelUrl,
         {
           Accept: "application/vnd.api+json",
+          "Keygen-Version": "1.0",
         },
         cancellationToken
       )