Gemfile.lock in particlefx2d-0.3.0 vs Gemfile.lock in particlefx2d-0.4.0

@@ -1,15 +1,17 @@
 PATH
   remote: .
   specs:
-    particlefx2d (0.3.0)
+    particlefx2d (0.4.0)
+      math2d (~> 1.4, >= 1.4.1)
 
 GEM
   remote: https://rubygems.org/
   specs:
     ast (2.4.2)
     diff-lcs (1.5.0)
+    math2d (1.4.1)
     parallel (1.22.1)
     parser (3.1.2.0)
       ast (~> 2.4.1)
     rainbow (3.1.1)
     rake (13.0.6)
@@ -42,11 +44,10 @@
     rubocop-rake (0.6.0)
       rubocop (~> 1.0)
     rubocop-rspec (2.9.0)
       rubocop (~> 1.19)
     ruby-progressbar (1.11.0)
-    ruby2d (0.11.3)
     unicode-display_width (2.1.0)
     webrick (1.7.0)
     yard (0.9.27)
       webrick (~> 1.7.0)
 
@@ -58,10 +59,9 @@
   rake
   rspec (~> 3.0)
   rubocop
   rubocop-rake
   rubocop-rspec
-  ruby2d (~> 0.11.3)
   yard
 
 BUNDLED WITH
    2.3.7