diff --git a/SpaceVim.d/snippets/sh.snip b/SpaceVim.d/snippets/sh.snip
index 3460e6b..7d61548 100644
--- a/SpaceVim.d/snippets/sh.snip
+++ b/SpaceVim.d/snippets/sh.snip
@@ -1,7 +1,7 @@
 snippet OS
 options head
 abbr    determine OS type(Mac/Linux/Windows)
-    if [ "$(uname)" == "Darwin" ]; then
-    elif [ "$(expr substr $(uname -s) 1 5)" == "Linux" ]; then
-    elif [ "$(expr substr $(uname -s) 1 10)" == "MINGW32_NT" ]; then
+    if [[ "$(uname)" == "Darwin" ]]; then
+    elif [[ "$(expr substr $(uname -s) 1 5)" == "Linux" ]]; then
+    elif [[ "$(expr substr $(uname -s) 1 10)" == "MINGW32_NT" ]]; then
     fi