diff --git a/IPython/nbconvert/utils/lexers.py b/IPython/nbconvert/utils/lexers.py
index 8fe0ff9..ee0b892 100644
--- a/IPython/nbconvert/utils/lexers.py
+++ b/IPython/nbconvert/utils/lexers.py
@@ -50,6 +50,7 @@ line_re = re.compile('.*?\n')
 
 ipython_tokens = [
   (r"(?s)(\s*)(%%)(\w+)(.*)", bygroups(Text, Operator, Keyword, Text)),
+  (r'(?s)(^\s*)(%%!)([^\n]*\n)(.*)', bygroups(Text, Operator, Text, using(BashLexer))),
   (r"(%%?)(\w+)(\?\??)$",  bygroups(Operator, Keyword, Operator)),
   (r"\b(\?\??)(\s*)$",  bygroups(Operator, Text)),
   (r'(%)(sx|sc|system)(.*)(\n)', bygroups(Operator, Keyword,
diff --git a/IPython/nbconvert/utils/tests/test_lexers.py b/IPython/nbconvert/utils/tests/test_lexers.py
index 351a60c..a18f892 100644
--- a/IPython/nbconvert/utils/tests/test_lexers.py
+++ b/IPython/nbconvert/utils/tests/test_lexers.py
@@ -40,6 +40,14 @@ class TestLexers(TestsBase):
         ] + tokens[1:]
         self.assertEqual(tokens_2, list(self.lexer.get_tokens(fragment_2)))
 
+        fragment_2 = '\t %%!\n' + fragment[1:]
+        tokens_2 = [
+            (Token.Text, '\t '),
+            (Token.Operator, '%%!'),
+            (Token.Text, '\n'),
+        ] + tokens[1:]
+        self.assertEqual(tokens_2, list(self.lexer.get_tokens(fragment_2)))
+
         fragment_2 = 'x = ' + fragment
         tokens_2 = [
             (Token.Name, 'x'),