diff --git a/Gemfile.lock b/Gemfile.lock
index 0ae7fae57..ff8f07596 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    rbs (3.5.1)
+    rbs (3.6.0.dev.1)
       logger
 
 PATH
diff --git a/lib/rbs/version.rb b/lib/rbs/version.rb
index 5f6f01d6b..82742fafe 100644
--- a/lib/rbs/version.rb
+++ b/lib/rbs/version.rb
@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module RBS
-  VERSION = "3.5.1"
+  VERSION = "3.6.0.dev.1"
 end