diff --git a/.gitmodules b/.gitmodules
index d1f2216..240e114 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -19,9 +19,6 @@
 [submodule ".vim/bundle/mileszs-ack"]
 	path = .vim/bundle/mileszs-ack
 	url = https://github.com/mileszs/ack.vim.git
-[submodule ".vim/bundle/vim-markdown-preview"]
-	path = .vim/bundle/vim-markdown-preview
-	url = https://github.com/robgleeson/vim-markdown-preview.git
 [submodule ".vim/bundle/vim-slim"]
 	path = .vim/bundle/vim-slim
 	url = https://github.com/bbommarito/vim-slim.git
diff --git a/.vim/bundle/vim-markdown-preview b/.vim/bundle/vim-markdown-preview
deleted file mode 160000
index b0842f8..0000000
--- a/.vim/bundle/vim-markdown-preview
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit b0842f896bf151324573e1d11a02be3c028876eb
diff --git a/.vim/key_mappings.vim b/.vim/key_mappings.vim
index 2dc84dd..a90e4dd 100644
--- a/.vim/key_mappings.vim
+++ b/.vim/key_mappings.vim
@@ -102,8 +102,6 @@
 
 " open the source in a browser for distribution or copying as RTF
   nmap gH :OpenHtml<CR>
-" open Markdown preview
-  nmap gM :Mm<CR>
 
 " Bubble single lines (uses unimpaired.vim)
   nmap <C-Up> [e