diff --git a/.ruby-version b/.ruby-version
new file mode 100644
index 0000000..eca690e
--- /dev/null
+++ b/.ruby-version
@@ -0,0 +1 @@
+3.0.5
diff --git a/Gemfile.lock b/Gemfile.lock
index 09b6de6..424b257 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -7,27 +7,27 @@ GEM
   remote: https://rubygems.org/
   specs:
     diff-lcs (1.5.0)
-    docile (1.3.4)
+    docile (1.4.0)
     eventmachine (1.2.7)
-    rspec (3.11.0)
-      rspec-core (~> 3.11.0)
-      rspec-expectations (~> 3.11.0)
-      rspec-mocks (~> 3.11.0)
-    rspec-core (3.11.0)
-      rspec-support (~> 3.11.0)
-    rspec-expectations (3.11.0)
+    rspec (3.12.0)
+      rspec-core (~> 3.12.0)
+      rspec-expectations (~> 3.12.0)
+      rspec-mocks (~> 3.12.0)
+    rspec-core (3.12.1)
+      rspec-support (~> 3.12.0)
+    rspec-expectations (3.12.2)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.11.0)
-    rspec-mocks (3.11.1)
+      rspec-support (~> 3.12.0)
+    rspec-mocks (3.12.3)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.11.0)
-    rspec-support (3.11.0)
-    simplecov (0.21.2)
+      rspec-support (~> 3.12.0)
+    rspec-support (3.12.0)
+    simplecov (0.22.0)
       docile (~> 1.1)
       simplecov-html (~> 0.11)
       simplecov_json_formatter (~> 0.1)
     simplecov-html (0.12.3)
-    simplecov_json_formatter (0.1.2)
+    simplecov_json_formatter (0.1.4)
 
 PLATFORMS
   ruby
@@ -39,4 +39,4 @@ DEPENDENCIES
   simplecov
 
 BUNDLED WITH
-   1.16.2
+   2.2.33
diff --git a/rethinkdb.gemspec b/rethinkdb.gemspec
index 41d7b14..b0a6fea 100644
--- a/rethinkdb.gemspec
+++ b/rethinkdb.gemspec
@@ -9,7 +9,7 @@ Gem::Specification.new do |s|
   s.license   = 'Apache-2.0'
   s.files     = Dir['lib/*.rb']
 
-  s.required_ruby_version = '>= 1.9.0'
+  s.required_ruby_version = '>= 2.7.7'
 
   s.add_development_dependency 'rspec'
   s.add_development_dependency 'simplecov'
diff --git a/spec/unit/rpp_spec.rb b/spec/unit/rpp_spec.rb
index b83cd3e..c72a1f4 100644
--- a/spec/unit/rpp_spec.rb
+++ b/spec/unit/rpp_spec.rb
@@ -39,7 +39,7 @@
 
       context 'with correct params' do
         let(:time) { Time.now }
-        let(:zone) { Time.now.isdst ? '+02:00' : '+01:00' }
+        let(:zone) { time.utc_offset }
         let(:params) { pt_hash.merge('timezone' => zone, 'epoch_time' => time.to_i)}
         let(:q) { double("q") }