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-rw-r--r--syntax/Dockerfile.vim2
1 files changed, 1 insertions, 1 deletions
diff --git a/syntax/Dockerfile.vim b/syntax/Dockerfile.vim
index 54d46096..2f68794c 100644
--- a/syntax/Dockerfile.vim
+++ b/syntax/Dockerfile.vim
@@ -37,7 +37,7 @@ syn region dockerfileString1 start=/'/ skip=/\\'|\\\\/ end=/'/
syn region dockerfileEmail start=/</ end=/>/ contains=@ oneline
" Urls
-syn match dockerfileUrl /\(http\|https\|ssh\|hg\|git\)\:\/\/[a-zA-Z0-9\/\-\.]\+/
+syn match dockerfileUrl /\(http\|https\|ssh\|hg\|git\)\:\/\/[a-zA-Z0-9\/\-\._]\+/
" Task tags
syn keyword dockerfileTodo contained TODO FIXME XXX