diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 476979a..477ccb9 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -23,10 +23,24 @@ tests:
   variables:
     POSTGRES_HOST_AUTH_METHOD: trust
     DATABASE_URL: postgres://postgres:secret@postgres:5432
+    PACT_DO_NOT_TRACK: true
   parallel:
     matrix:
       - RUBY_VERSION: ['2.7', '3.0', '3.1', '3.2', '3.3']
   before_script:
+    - |
+      https_proxy=${INTERNAL_WEB_PROXY} curl -LO https://github.com/pact-foundation/pact-plugins/releases/download/pact-plugin-cli-v0.0.0/pact-plugin-cli-linux-x86_64.gz && \
+      gunzip pact-plugin-cli-linux-x86_64.gz && \
+      chmod +x pact-plugin-cli-linux-x86_64 && \
+      mv pact-plugin-cli-linux-x86_64 /usr/local/bin/pact-plugin-cli && \
+      https_proxy=${INTERNAL_WEB_PROXY} pact-plugin-cli -y install https://github.com/pactflow/pact-protobuf-plugin/releases/tag/v-0.4.0
+    - |
+      https_proxy=${INTERNAL_WEB_PROXY} curl -LO https://github.com/protocolbuffers/protobuf/releases/download/v21.12/protoc-21.12-linux-x86_64.zip && \
+      unzip protoc-21.12-linux-x86_64.zip -d protoc && \
+      chmod +x protoc/bin/protoc && \
+      mv protoc/bin/protoc /usr/local/bin/protoc
+    - gem sources --remove https://rubygems.org/
+    - gem sources --add ${RUBYGEMS_PUBLIC_SOURCE}
     - gem install bundler -v 2.4.22
     - bin/setup
   script:
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 538475d..c264d4e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -15,6 +15,16 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 ### Fixed
 
+## [0.12.1] - 2024-12-12
+
+### Changed
+- replaced localhost to 127.0.0.1 for provider tests
+
+## [0.12.0] - 2024-09-11
+
+# Changed
+- remove internal deps
+
 ## [0.11.1] - 2024-08-22
 
 ### Fixed
diff --git a/lib/sbmt/pact/consumer/grpc_interaction_builder.rb b/lib/sbmt/pact/consumer/grpc_interaction_builder.rb
index f28a429..a8f081f 100644
--- a/lib/sbmt/pact/consumer/grpc_interaction_builder.rb
+++ b/lib/sbmt/pact/consumer/grpc_interaction_builder.rb
@@ -12,6 +12,8 @@ class GrpcInteractionBuilder
         CONTENT_TYPE = "application/protobuf"
         GRPC_CONTENT_TYPE = "application/grpc"
         PROTOBUF_PLUGIN_NAME = "protobuf"
+
+        # see .gitlab-ci.yml before changing plugin version
         PROTOBUF_PLUGIN_VERSION = "0.4.0"
 
         class PluginInitError < Sbmt::Pact::FfiError; end
diff --git a/lib/sbmt/pact/provider/http_server.rb b/lib/sbmt/pact/provider/http_server.rb
index 001b9b9..6d59767 100644
--- a/lib/sbmt/pact/provider/http_server.rb
+++ b/lib/sbmt/pact/provider/http_server.rb
@@ -12,7 +12,7 @@ def initialize(options = {})
 
           @server_pid = nil
 
-          @host = @options[:host] || "localhost"
+          @host = @options[:host] || "127.0.0.1"
           @logger = @options[:logger] || ::Logger.new($stdout)
         end
 
diff --git a/lib/sbmt/pact/version.rb b/lib/sbmt/pact/version.rb
index 0fcb6e9..acf64e4 100644
--- a/lib/sbmt/pact/version.rb
+++ b/lib/sbmt/pact/version.rb
@@ -2,6 +2,6 @@
 
 module Sbmt
   module Pact
-    VERSION = "0.12.0"
+    VERSION = "0.12.1"
   end
 end
diff --git a/spec/pact/providers/sbmt-pact-test-app/grpc_client_spec.rb b/spec/pact/providers/sbmt-pact-test-app/grpc_client_spec.rb
index de0471c..48bc0e4 100644
--- a/spec/pact/providers/sbmt-pact-test-app/grpc_client_spec.rb
+++ b/spec/pact/providers/sbmt-pact-test-app/grpc_client_spec.rb
@@ -7,7 +7,7 @@
 
   let(:pet_id) { 123 }
 
-  let(:api) { ::PetStore::Grpc::PetStore::V1::Pets::Stub.new("localhost:3009", :this_channel_is_insecure) }
+  let(:api) { ::PetStore::Grpc::PetStore::V1::Pets::Stub.new("127.0.0.1:3009", :this_channel_is_insecure) }
   let(:make_request) { api.pet_by_id(PetStore::Grpc::PetStore::V1::PetByIdRequest.new(id: pet_id)) }
 
   let(:interaction) do
diff --git a/spec/pact/providers/sbmt-pact-test-app/http_client_spec.rb b/spec/pact/providers/sbmt-pact-test-app/http_client_spec.rb
index 715faaa..f11e808 100644
--- a/spec/pact/providers/sbmt-pact-test-app/http_client_spec.rb
+++ b/spec/pact/providers/sbmt-pact-test-app/http_client_spec.rb
@@ -6,7 +6,7 @@
   has_http_pact_between "sbmt-pact-test-app", "sbmt-pact-test-app"
 
   let(:pet_id) { 123 }
-  let(:host) { "localhost:3000" }
+  let(:host) { "127.0.0.1:3000" }
   let(:interaction) { new_interaction }
   let(:http_client) do
     Faraday.new do |conn|
diff --git a/spec/sbmt/pact/provider/gruf_server_spec.rb b/spec/sbmt/pact/provider/gruf_server_spec.rb
index 15e77c0..58164a8 100644
--- a/spec/sbmt/pact/provider/gruf_server_spec.rb
+++ b/spec/sbmt/pact/provider/gruf_server_spec.rb
@@ -1,7 +1,7 @@
 # frozen_string_literal: true
 
 describe Sbmt::Pact::Provider::GrufServer do
-  let(:api) { ::PetStore::Grpc::PetStore::V1::Pets::Stub.new("localhost:3009", :this_channel_is_insecure) }
+  let(:api) { ::PetStore::Grpc::PetStore::V1::Pets::Stub.new("127.0.0.1:3009", :this_channel_is_insecure) }
   let(:call_rpc) do
     subject.run { api.pet_by_id(PetStore::Grpc::PetStore::V1::PetByIdRequest.new(id: 1)) }
   end
diff --git a/spec/sbmt/pact/provider/provider_server_runner_spec.rb b/spec/sbmt/pact/provider/provider_server_runner_spec.rb
index acaffcf..9178895 100644
--- a/spec/sbmt/pact/provider/provider_server_runner_spec.rb
+++ b/spec/sbmt/pact/provider/provider_server_runner_spec.rb
@@ -9,7 +9,7 @@
   end
 
   let(:make_request) do
-    server.run { http_client.post("http://localhost:9001/setup-provider", request_body) }
+    server.run { http_client.post("http://127.0.0.1:9001/setup-provider", request_body) }
   end
 
   let(:server) do