diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 518e71c..9f04955 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -25,7 +25,9 @@ jobs:
           ruby-version: ${{ matrix.rubyVersion }}
 
       - name: Install bundle
-        run: bundle install
+        run: |
+          bundle config set path /tmp/bundle-dir
+          bundle install
 
       - name: Lint and test
         run: bundle exec rake TESTOPTS="--verbose"
diff --git a/Gemfile.lock b/Gemfile.lock
index 6e29dce..d5e2386 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -13,23 +13,23 @@ GEM
   specs:
     ast (2.4.2)
     base64 (0.2.0)
-    bigdecimal (3.1.9)
-    google-protobuf (4.31.1)
+    bigdecimal (3.2.2)
+    google-protobuf (4.32.0)
       bigdecimal
       rake (>= 13)
-    google-protobuf (4.31.1-aarch64-linux-gnu)
+    google-protobuf (4.32.0-aarch64-linux-gnu)
       bigdecimal
       rake (>= 13)
-    google-protobuf (4.31.1-arm64-darwin)
+    google-protobuf (4.32.0-arm64-darwin)
       bigdecimal
       rake (>= 13)
-    google-protobuf (4.31.1-x86-linux-gnu)
+    google-protobuf (4.32.0-x86-linux-gnu)
       bigdecimal
       rake (>= 13)
-    google-protobuf (4.31.1-x86_64-darwin)
+    google-protobuf (4.32.0-x86_64-darwin)
       bigdecimal
       rake (>= 13)
-    google-protobuf (4.31.1-x86_64-linux-gnu)
+    google-protobuf (4.32.0-x86_64-linux-gnu)
       bigdecimal
       rake (>= 13)
     googleapis-common-protos-types (1.19.0)
@@ -66,7 +66,7 @@ GEM
       racc
     racc (1.8.1)
     rainbow (3.1.1)
-    rake (13.2.1)
+    rake (13.3.0)
     regexp_parser (2.10.0)
     rubocop (1.70.0)
       json (~> 2.3)
@@ -81,19 +81,19 @@ GEM
     rubocop-ast (1.37.0)
       parser (>= 3.3.1.0)
     ruby-progressbar (1.13.0)
-    temporalio (0.5.0)
+    temporalio (0.6.0)
       google-protobuf (>= 3.25.0)
       logger
-    temporalio (0.5.0-aarch64-linux)
+    temporalio (0.6.0-aarch64-linux)
       google-protobuf (>= 3.25.0)
       logger
-    temporalio (0.5.0-arm64-darwin)
+    temporalio (0.6.0-arm64-darwin)
       google-protobuf (>= 3.25.0)
       logger
-    temporalio (0.5.0-x86_64-darwin)
+    temporalio (0.6.0-x86_64-darwin)
       google-protobuf (>= 3.25.0)
       logger
-    temporalio (0.5.0-x86_64-linux)
+    temporalio (0.6.0-x86_64-linux)
       google-protobuf (>= 3.25.0)
       logger
     unicode-display_width (3.1.4)
diff --git a/message_passing_simple/greeting_workflow.rb b/message_passing_simple/greeting_workflow.rb
index ca0211c..3b5a80d 100644
--- a/message_passing_simple/greeting_workflow.rb
+++ b/message_passing_simple/greeting_workflow.rb
@@ -70,7 +70,7 @@ def apply_language_with_lookup(new_language)
         # We use a mutex so that, if this handler is executed multiple times, each execution can schedule the activity
         # only when the previously scheduled activity has completed. This ensures that multiple calls to
         # apply_language_with_lookup are processed in order.
-        @apply_language_mutex ||= Mutex.new
+        @apply_language_mutex ||= Temporalio::Workflow::Mutex.new
         @apply_language_mutex.synchronize do
           greeting = Temporalio::Workflow.execute_activity(
             CallGreetingService, new_language, start_to_close_timeout: 10