diff --git a/plugin/syntastic.vim b/plugin/syntastic.vim
index d72bf1ad..c106f2f9 100644
--- a/plugin/syntastic.vim
+++ b/plugin/syntastic.vim
@@ -19,7 +19,7 @@ if has('reltime')
     lockvar! g:_SYNTASTIC_START
 endif
 
-let g:_SYNTASTIC_VERSION = '3.6.0-14'
+let g:_SYNTASTIC_VERSION = '3.6.0-15'
 lockvar g:_SYNTASTIC_VERSION
 
 " Sanity checks {{{1
diff --git a/syntax_checkers/python/prospector.vim b/syntax_checkers/python/prospector.vim
index 4f451012..871a81b4 100644
--- a/syntax_checkers/python/prospector.vim
+++ b/syntax_checkers/python/prospector.vim
@@ -31,7 +31,6 @@ endfunction
 
 function! SyntaxCheckers_python_prospector_GetLocList() dict
     let makeprg = self.makeprgBuild({
-        \ 'args': '--external-config merge',
         \ 'args_after': '--messages-only --absolute-paths --die-on-tool-error --zero-exit --output-format json' })
 
     let errorformat = '%f:%l:%c: %m'