diff --git a/lib/ruby_wasm/version.rb b/lib/ruby_wasm/version.rb
index a716bad90..0eeae077f 100644
--- a/lib/ruby_wasm/version.rb
+++ b/lib/ruby_wasm/version.rb
@@ -1,3 +1,3 @@
 module RubyWasm
-  VERSION = "2.7.0"
+  VERSION = "2.7.0.dev"
 end
diff --git a/packages/gems/js/lib/js/version.rb b/packages/gems/js/lib/js/version.rb
index a56db6ee0..d555948d1 100644
--- a/packages/gems/js/lib/js/version.rb
+++ b/packages/gems/js/lib/js/version.rb
@@ -1,3 +1,3 @@
 module JS
-  VERSION = "2.7.0"
+  VERSION = "2.7.0.dev"
 end
diff --git a/packages/npm-packages/ruby-3.2-wasm-wasi/Gemfile.lock b/packages/npm-packages/ruby-3.2-wasm-wasi/Gemfile.lock
index 0daaef27e..799e24810 100644
--- a/packages/npm-packages/ruby-3.2-wasm-wasi/Gemfile.lock
+++ b/packages/npm-packages/ruby-3.2-wasm-wasi/Gemfile.lock
@@ -1,12 +1,12 @@
 PATH
   remote: ../../..
   specs:
-    ruby_wasm (2.7.0)
+    ruby_wasm (2.7.0.dev)
 
 PATH
   remote: ../../gems/js
   specs:
-    js (2.7.0)
+    js (2.7.0.dev)
 
 GEM
   remote: https://rubygems.org/
diff --git a/packages/npm-packages/ruby-3.3-wasm-wasi/Gemfile.lock b/packages/npm-packages/ruby-3.3-wasm-wasi/Gemfile.lock
index 0daaef27e..799e24810 100644
--- a/packages/npm-packages/ruby-3.3-wasm-wasi/Gemfile.lock
+++ b/packages/npm-packages/ruby-3.3-wasm-wasi/Gemfile.lock
@@ -1,12 +1,12 @@
 PATH
   remote: ../../..
   specs:
-    ruby_wasm (2.7.0)
+    ruby_wasm (2.7.0.dev)
 
 PATH
   remote: ../../gems/js
   specs:
-    js (2.7.0)
+    js (2.7.0.dev)
 
 GEM
   remote: https://rubygems.org/
diff --git a/packages/npm-packages/ruby-head-wasm-wasi/Gemfile.lock b/packages/npm-packages/ruby-head-wasm-wasi/Gemfile.lock
index adfd27688..aa4e49ca0 100644
--- a/packages/npm-packages/ruby-head-wasm-wasi/Gemfile.lock
+++ b/packages/npm-packages/ruby-head-wasm-wasi/Gemfile.lock
@@ -1,12 +1,12 @@
 PATH
   remote: ../../..
   specs:
-    ruby_wasm (2.7.0)
+    ruby_wasm (2.7.0.dev)
 
 GEM
   remote: https://rubygems.org/
   specs:
-    js (2.7.0)
+    js (2.7.0.dev)
     power_assert (2.0.3)
     test-unit (3.6.2)
       power_assert
@@ -16,7 +16,7 @@ PLATFORMS
   x86_64-linux
 
 DEPENDENCIES
-  js (= 2.7.0)
+  js (= 2.7.0.dev)
   power_assert
   ruby_wasm!
   test-unit
diff --git a/packages/npm-packages/ruby-head-wasm-wasip2/Gemfile.lock b/packages/npm-packages/ruby-head-wasm-wasip2/Gemfile.lock
index adfd27688..aa4e49ca0 100644
--- a/packages/npm-packages/ruby-head-wasm-wasip2/Gemfile.lock
+++ b/packages/npm-packages/ruby-head-wasm-wasip2/Gemfile.lock
@@ -1,12 +1,12 @@
 PATH
   remote: ../../..
   specs:
-    ruby_wasm (2.7.0)
+    ruby_wasm (2.7.0.dev)
 
 GEM
   remote: https://rubygems.org/
   specs:
-    js (2.7.0)
+    js (2.7.0.dev)
     power_assert (2.0.3)
     test-unit (3.6.2)
       power_assert
@@ -16,7 +16,7 @@ PLATFORMS
   x86_64-linux
 
 DEPENDENCIES
-  js (= 2.7.0)
+  js (= 2.7.0.dev)
   power_assert
   ruby_wasm!
   test-unit