diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index b5c7d752fa8..2fc817a7ab1 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,5 +1,5 @@
 {
-  "google-apis-core": "1.0.2",
+  "google-apis-core": "1.1.0",
   "google-apis-core+FILLER": "0.0.0",
   "google-apis-generator": "0.18.0",
   "google-apis-generator+FILLER": "0.0.0"
diff --git a/google-apis-core/CHANGELOG.md b/google-apis-core/CHANGELOG.md
index a85a868cb16..5376074cce4 100644
--- a/google-apis-core/CHANGELOG.md
+++ b/google-apis-core/CHANGELOG.md
@@ -1,5 +1,11 @@
 # Release History
 
+### 1.1.0 (2026-04-19)
+
+#### Features
+
+* adding checksum header ([#25157](https://github.com/googleapis/google-api-ruby-client/issues/25157)) 
+
 ### 1.0.2 (2025-09-09)
 
 #### Bug Fixes
diff --git a/google-apis-core/lib/google/apis/core/version.rb b/google-apis-core/lib/google/apis/core/version.rb
index 75fbf04b569..30de1207350 100644
--- a/google-apis-core/lib/google/apis/core/version.rb
+++ b/google-apis-core/lib/google/apis/core/version.rb
@@ -16,7 +16,7 @@ module Google
   module Apis
     module Core
       # Core version
-      VERSION = "1.0.2".freeze
+      VERSION = "1.1.0".freeze
     end
   end
 end