diff --git a/Dockerfile b/Dockerfile
index 184ed37..71d0c6b 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-ARG RUBY_VERSION=3.3.1
+ARG RUBY_VERSION=3.3.3
 FROM ruby:${RUBY_VERSION}
 ARG RAILS_VERSION
 # Install Rails based on the version specified but if not specified, install the latest version.
diff --git a/Dockerfile.unix b/Dockerfile.unix
index 3e29b2f..5709f1c 100644
--- a/Dockerfile.unix
+++ b/Dockerfile.unix
@@ -1,4 +1,4 @@
-ARG RUBY_VERSION=3.3.1
+ARG RUBY_VERSION=3.3.3
 FROM ruby:${RUBY_VERSION}
 ARG USER_ID=1000
 ARG GROUP_ID=1000
diff --git a/src/rails_new.rs b/src/rails_new.rs
index 02db921..f6d21ac 100644
--- a/src/rails_new.rs
+++ b/src/rails_new.rs
@@ -6,7 +6,7 @@ pub struct Cli {
     #[clap(trailing_var_arg = true, required = true)]
     /// arguments passed to `rails new`
     pub args: Vec<String>,
-    #[clap(long, short = 'u', default_value = "3.3.1")]
+    #[clap(long, short = 'u', default_value = "3.3.3")]
     pub ruby_version: String,
     #[clap(long, short = 'r', default_value = "7.1.3")]
     pub rails_version: String,
@@ -54,7 +54,7 @@ mod tests {
         let ruby_version = m.get_one::<String>("ruby_version").unwrap();
         let rails_version = m.get_one::<String>("rails_version").unwrap();
 
-        assert_eq!(ruby_version, "3.3.1");
+        assert_eq!(ruby_version, "3.3.3");
         assert_eq!(rails_version, "7.1.3");
 
         Ok(())