diff --git a/.ruby-version b/.ruby-version
index 9c25013..47b322c 100644
--- a/.ruby-version
+++ b/.ruby-version
@@ -1 +1 @@
-3.3.6
+3.4.1
diff --git a/Gemfile.lock b/Gemfile.lock
index 73810e0..653ed2b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -14,18 +14,12 @@ GEM
     coderay (1.1.3)
     commonmarker (0.23.11)
     diff-lcs (1.5.1)
-    google-protobuf (4.29.2-arm64-darwin)
-      bigdecimal
-      rake (>= 13)
-    google-protobuf (4.29.2-x86_64-linux)
+    google-protobuf (4.29.2)
       bigdecimal
       rake (>= 13)
     googleapis-common-protos-types (1.16.0)
       google-protobuf (>= 3.18, < 5.a)
-    grpc (1.68.1-arm64-darwin)
-      google-protobuf (>= 3.25, < 5.0)
-      googleapis-common-protos-types (~> 1.0)
-    grpc (1.68.1-x86_64-linux)
+    grpc (1.68.1)
       google-protobuf (>= 3.25, < 5.0)
       googleapis-common-protos-types (~> 1.0)
     json (2.9.1)
@@ -116,4 +110,4 @@ DEPENDENCIES
   yard
 
 BUNDLED WITH
-   2.5.23
+   2.6.2
diff --git a/bin/test-matrix b/bin/test-matrix
index 94322f8..0f0af85 100755
--- a/bin/test-matrix
+++ b/bin/test-matrix
@@ -31,7 +31,7 @@ def matrix_entries(vary, *latest, include_latest: false)
 end
 
 # We support non-end-of-life Ruby versions: https://www.ruby-lang.org/en/downloads/branches/
-ruby_versions = Versions.new(["3.1", "3.2", "3.3"])
+ruby_versions = Versions.new(["3.1", "3.2", "3.3", "3.4"])
 
 minimum_cerbos_version = Gem::Version.new("0.16.0")
 available_cerbos_versions = []