diff --git a/requirements-dev.txt b/requirements-dev.txt
index 75f11f1cd..f6a0854ed 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -2,7 +2,7 @@
 # -------------------------------------
 
 # ---- Need libraries installed by setup.py
-cfn_flip>=1.0.2
+cfn_flip>=1.2.1
 awacs>=0.8
 
 # ---- Documentation Libraries
diff --git a/requirements.txt b/requirements.txt
index 6131a2f70..9f14b04b2 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,4 +2,4 @@
 # -------------------------------------
 
 # ---- Need libraries installed by setup.py
-cfn_flip>=1.0.2
+cfn_flip>=1.2.1
diff --git a/troposphere/__init__.py b/troposphere/__init__.py
index 6f4dd4a19..616fba1b8 100644
--- a/troposphere/__init__.py
+++ b/troposphere/__init__.py
@@ -784,9 +784,9 @@ def to_json(self, indent=4, sort_keys=True, separators=(',', ': ')):
         return json.dumps(self.to_dict(), indent=indent,
                           sort_keys=sort_keys, separators=separators)
 
-    def to_yaml(self, clean_up=False, long_form=False):
+    def to_yaml(self, clean_up=False, long_form=False, literal=True):
         return cfn_flip.to_yaml(self.to_json(), clean_up=clean_up,
-                                long_form=long_form)
+                                long_form=long_form, literal=literal)
 
     def __eq__(self, other):
         if isinstance(other, Template):