Merge branch 'master' of github.com:imduffy15/ec2stack into run-instance
diff --git a/ec2stack/helpers.py b/ec2stack/helpers.py
index b589427..34c90b2 100644
--- a/ec2stack/helpers.py
+++ b/ec2stack/helpers.py
@@ -188,6 +188,8 @@
         )
     )
 
+    query_string = query_string.replace('+', '%20')
+
     return query_string