diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 92c31541808d..f3f85b6f5f18 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -591,7 +591,7 @@
   "google-cloud-notebooks-v1+FILLER": "0.0.0",
   "google-cloud-notebooks-v1beta1": "0.16.0",
   "google-cloud-notebooks-v1beta1+FILLER": "0.0.0",
-  "google-cloud-notebooks-v2": "1.3.1",
+  "google-cloud-notebooks-v2": "1.4.0",
   "google-cloud-notebooks-v2+FILLER": "0.0.0",
   "google-cloud-optimization": "1.4.0",
   "google-cloud-optimization+FILLER": "0.0.0",
diff --git a/google-cloud-notebooks-v2/CHANGELOG.md b/google-cloud-notebooks-v2/CHANGELOG.md
index 37cde100f3a7..ad05af4907c9 100644
--- a/google-cloud-notebooks-v2/CHANGELOG.md
+++ b/google-cloud-notebooks-v2/CHANGELOG.md
@@ -1,5 +1,11 @@
 # Changelog
 
+### 1.4.0 (2026-03-19)
+
+#### Features
+
+* Upgrade dependencies for Ruby v4.0 and drop Ruby v3.1 support
+
 ### 1.3.1 (2025-10-27)
 
 #### Documentation
diff --git a/google-cloud-notebooks-v2/lib/google/cloud/notebooks/v2/version.rb b/google-cloud-notebooks-v2/lib/google/cloud/notebooks/v2/version.rb
index 3eb8b25fda68..0d533f3453f7 100644
--- a/google-cloud-notebooks-v2/lib/google/cloud/notebooks/v2/version.rb
+++ b/google-cloud-notebooks-v2/lib/google/cloud/notebooks/v2/version.rb
@@ -21,7 +21,7 @@ module Google
   module Cloud
     module Notebooks
       module V2
-        VERSION = "1.3.1"
+        VERSION = "1.4.0"
       end
     end
   end
diff --git a/google-cloud-notebooks-v2/snippets/snippet_metadata_google.cloud.notebooks.v2.json b/google-cloud-notebooks-v2/snippets/snippet_metadata_google.cloud.notebooks.v2.json
index ba1084484a47..651fe614ebae 100644
--- a/google-cloud-notebooks-v2/snippets/snippet_metadata_google.cloud.notebooks.v2.json
+++ b/google-cloud-notebooks-v2/snippets/snippet_metadata_google.cloud.notebooks.v2.json
@@ -1,7 +1,7 @@
 {
   "client_library": {
     "name": "google-cloud-notebooks-v2",
-    "version": "1.3.1",
+    "version": "1.4.0",
     "language": "RUBY",
     "apis": [
       {