diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index eb7490e..df6879a 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -16,7 +16,7 @@ jobs:
       matrix:
         os: [ubuntu-latest, macos-latest]
         # Earliest and latest supported
-        rubyVersion: ["3.2", "3.4"]
+        rubyVersion: ["3.3", "4.0"]
     runs-on: ${{ matrix.os }}
     steps:
       - name: Checkout repository
diff --git a/Gemfile.lock b/Gemfile.lock
index 40f364b..eec61ea 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -145,25 +145,25 @@ GEM
       rack-protection (= 4.2.1)
       rack-session (>= 2.0.0, < 3)
       tilt (~> 2.0)
-    temporalio (1.1.0)
+    temporalio (1.2.0)
       google-protobuf (>= 3.25.0)
       logger
-    temporalio (1.1.0-aarch64-linux)
+    temporalio (1.2.0-aarch64-linux)
       google-protobuf (>= 3.25.0)
       logger
-    temporalio (1.1.0-aarch64-linux-musl)
+    temporalio (1.2.0-aarch64-linux-musl)
       google-protobuf (>= 3.25.0)
       logger
-    temporalio (1.1.0-arm64-darwin)
+    temporalio (1.2.0-arm64-darwin)
       google-protobuf (>= 3.25.0)
       logger
-    temporalio (1.1.0-x86_64-darwin)
+    temporalio (1.2.0-x86_64-darwin)
       google-protobuf (>= 3.25.0)
       logger
-    temporalio (1.1.0-x86_64-linux)
+    temporalio (1.2.0-x86_64-linux)
       google-protobuf (>= 3.25.0)
       logger
-    temporalio (1.1.0-x86_64-linux-musl)
+    temporalio (1.2.0-x86_64-linux-musl)
       google-protobuf (>= 3.25.0)
       logger
     tilt (2.6.1)
diff --git a/README.md b/README.md
index b51bd85..e00f49c 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@ This is the set of Ruby samples for the [Ruby SDK](https://github.com/temporalio
 
 Prerequisites:
 
-* Ruby 3.2+
+* Ruby 3.3+
 * Local Temporal server running (can [install CLI](https://docs.temporal.io/cli#install) then
   [run a dev server](https://docs.temporal.io/cli#start-dev-server))
 * `bundle install` run in the root
diff --git a/rails_app/Gemfile.lock b/rails_app/Gemfile.lock
index 9e224cc..410454d 100644
--- a/rails_app/Gemfile.lock
+++ b/rails_app/Gemfile.lock
@@ -254,25 +254,25 @@ GEM
     sqlite3 (2.6.0-x86_64-linux-gnu)
     sqlite3 (2.6.0-x86_64-linux-musl)
     stringio (3.1.7)
-    temporalio (1.0.0)
+    temporalio (1.2.0)
       google-protobuf (>= 3.25.0)
       logger
-    temporalio (1.0.0-aarch64-linux)
+    temporalio (1.2.0-aarch64-linux)
       google-protobuf (>= 3.25.0)
       logger
-    temporalio (1.0.0-aarch64-linux-musl)
+    temporalio (1.2.0-aarch64-linux-musl)
       google-protobuf (>= 3.25.0)
       logger
-    temporalio (1.0.0-arm64-darwin)
+    temporalio (1.2.0-arm64-darwin)
       google-protobuf (>= 3.25.0)
       logger
-    temporalio (1.0.0-x86_64-darwin)
+    temporalio (1.2.0-x86_64-darwin)
       google-protobuf (>= 3.25.0)
       logger
-    temporalio (1.0.0-x86_64-linux)
+    temporalio (1.2.0-x86_64-linux)
       google-protobuf (>= 3.25.0)
       logger
-    temporalio (1.0.0-x86_64-linux-musl)
+    temporalio (1.2.0-x86_64-linux-musl)
       google-protobuf (>= 3.25.0)
       logger
     thor (1.3.2)
diff --git a/sorbet_generic/Gemfile.lock b/sorbet_generic/Gemfile.lock
index 79baefe..70af906 100644
--- a/sorbet_generic/Gemfile.lock
+++ b/sorbet_generic/Gemfile.lock
@@ -52,19 +52,19 @@ GEM
       spoom (>= 1.2.0)
       thor (>= 1.2.0)
       yard-sorbet
-    temporalio (1.0.0-aarch64-linux)
+    temporalio (1.2.0-aarch64-linux)
       google-protobuf (>= 3.25.0)
       logger
-    temporalio (1.0.0-arm64-darwin)
+    temporalio (1.2.0-arm64-darwin)
       google-protobuf (>= 3.25.0)
       logger
-    temporalio (1.0.0-x86_64-darwin)
+    temporalio (1.2.0-x86_64-darwin)
       google-protobuf (>= 3.25.0)
       logger
-    temporalio (1.0.0-x86_64-linux)
+    temporalio (1.2.0-x86_64-linux)
       google-protobuf (>= 3.25.0)
       logger
-    temporalio (1.0.0-x86_64-linux-musl)
+    temporalio (1.2.0-x86_64-linux-musl)
       google-protobuf (>= 3.25.0)
       logger
     thor (1.3.2)