diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 317433d..8f9a78b 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -25,6 +25,7 @@ jobs:
           - 2.5
           - 2.4
         gemfile:
+          - openssl_3_3
           - openssl_3_2
           - openssl_3_1
           - openssl_3_0
@@ -38,14 +39,20 @@ jobs:
             gemfile: openssl_3_1
           - ruby: '2.4'
             gemfile: openssl_3_2
+          - ruby: '2.4'
+            gemfile: openssl_3_3
           - ruby: '2.5'
             gemfile: openssl_3_0
           - ruby: '2.5'
             gemfile: openssl_3_1
           - ruby: '2.5'
             gemfile: openssl_3_2
+          - ruby: '2.5'
+            gemfile: openssl_3_3
           - ruby: '2.6'
             gemfile: openssl_3_2
+          - ruby: '2.6'
+            gemfile: openssl_3_3
 
     env:
       BUNDLE_GEMFILE: gemfiles/${{ matrix.gemfile }}.gemfile
diff --git a/Appraisals b/Appraisals
index 7c125a7..b7bc8a0 100644
--- a/Appraisals
+++ b/Appraisals
@@ -20,5 +20,9 @@ appraise "openssl_3_2" do
   gem "openssl", "~> 3.2.0"
 end
 
+appraise "openssl_3_3" do
+  gem "openssl", "~> 3.3.0"
+end
+
 appraise "openssl_default" do
 end
diff --git a/gemfiles/openssl_3_3.gemfile b/gemfiles/openssl_3_3.gemfile
new file mode 100644
index 0000000..3cd6a7b
--- /dev/null
+++ b/gemfiles/openssl_3_3.gemfile
@@ -0,0 +1,7 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "openssl", "~> 3.3.0"
+
+gemspec path: "../"