diff --git a/changelogs/unreleased/update-google-protobuf-to-3-15-8.yml b/changelogs/unreleased/update-google-protobuf-to-3-15-8.yml
deleted file mode 100644
index 7c6ea40184f76043e9f34d8d7b0e2e57d3917003..0000000000000000000000000000000000000000
--- a/changelogs/unreleased/update-google-protobuf-to-3-15-8.yml
+++ /dev/null
@@ -1,5 +0,0 @@
----
-title: Update google-protobuf to 3.15.8 to support Ruby 3.0
-merge_request: 3399
-author: Takuya Noguchi
-type: other
diff --git a/ruby/Gemfile b/ruby/Gemfile
index 8231cff4dc657c1c04643b01be4841a9f9358f65..adee2020f6fa14a767b0a1f3ce6e9ed4069eb689 100644
--- a/ruby/Gemfile
+++ b/ruby/Gemfile
@@ -19,7 +19,7 @@ gem 'gitlab-labkit', '~> 0.16.2'
 # This version needs to be in sync with GitLab CE/EE
 gem 'licensee', '~> 9.14.1'
 
-gem 'google-protobuf', '~> 3.15.8'
+gem 'google-protobuf', '~> 3.14.0'
 
 group :development, :test do
   gem 'rubocop', '~> 0.69', require: false
diff --git a/ruby/Gemfile.lock b/ruby/Gemfile.lock
index b96739d7cecb22fa7a59a862a4adffbeacf2b669..a8e2f3f5a6777b9c62542b0bf8fb980b5fe47fec 100644
--- a/ruby/Gemfile.lock
+++ b/ruby/Gemfile.lock
@@ -74,7 +74,7 @@ GEM
       pg_query (~> 1.3)
       redis (> 3.0.0, < 5.0.0)
     gitlab-markup (1.7.1)
-    google-protobuf (3.15.8)
+    google-protobuf (3.14.0)
     googleapis-common-protos-types (1.0.5)
       google-protobuf (~> 3.11)
     grpc (1.30.2)
@@ -223,7 +223,7 @@ DEPENDENCIES
   gitlab-gollum-rugged_adapter (~> 0.4.4.4.gitlab.1)
   gitlab-labkit (~> 0.16.2)
   gitlab-markup (~> 1.7.1)
-  google-protobuf (~> 3.15.8)
+  google-protobuf (~> 3.14.0)
   grpc (~> 1.30.2)
   grpc-tools (= 1.30.2)
   licensee (~> 9.14.1)