diff --git a/Gemfile.lock b/Gemfile.lock
index d9cf41358..3b93c4c24 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    rbs (3.5.0)
+    rbs (3.5.1.pre.1)
 
 PATH
   remote: test/assets/test-gem
diff --git a/lib/rbs/version.rb b/lib/rbs/version.rb
index 04ec38584..ae242bb93 100644
--- a/lib/rbs/version.rb
+++ b/lib/rbs/version.rb
@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module RBS
-  VERSION = "3.5.0"
+  VERSION = "3.5.1.pre.1"
 end