diff --git a/Project.toml b/Project.toml
index 0bc9cdc..df2b02b 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,7 +1,7 @@
 name = "OpenStreetMapX"
 uuid = "86cd37e6-c0ff-550b-95fe-21d72c8d4fc9"
 authors = ["Przemyslaw Szufel <pszufe@gmail.com>", "Bartosz Pankratz <bartosz.pankratz@gmail.com>", "Anna Szczurek <annaszczurek2@gmail.com>", "Bogumil Kaminski <bogumil.kaminski@gmail.com>", "Pawel Pralat <pralat@ryerson.ca>"]
-version = "0.2.2"
+version = "0.2.3"
 
 [deps]
 DataStructures = "864edb3b-99cc-5e75-8d2d-829cb0a9cfe8"
@@ -16,7 +16,7 @@ Statistics = "10745b16-79ce-11e8-11f9-7d13ad32a3b2"
 
 [compat]
 DataStructures = "^0.17.0, ^0.18.0"
-HTTP = "^0.7.0, ^0.8.0"
+HTTP = "^0.7.0, ^0.8.0, ^0.9.0"
 JSON = "^0.20.0, ^0.21.0"
 LibExpat = "^0.6.0"
 LightGraphs = "^1.3.3"
diff --git a/src/types.jl b/src/types.jl
index a4225d5..35c7257 100644
--- a/src/types.jl
+++ b/src/types.jl
@@ -258,13 +258,13 @@ This is the main data structure used fot map data analytics.
 * `roadways` :  unique roads stored as a OpenStreetMapX.Way objects
 * `intersections` : roads intersections
 * `g` : `LightGraphs` directed graph representing a road network
-* `v` : vertices in the road network 
-* `n` : OpenStreetMap node ids for the graphs vertices 
-* `e` : edges in the graph represented as a tuple (source,destination)
-* `w` : edge weights, indexed by graph id
+* `v` : vertices in the road network (node id .=> graph vertex)
+* `n` : vector of OpenStreetMap node ids for each corresponding graph vertex 
+* `e` : vector of edges in the graph represented as a tuple (source,destination)
+* `w` : sparse matrix of edge weights, indexed by graph id
 * `class` : road class of each edge
 """
-struct MapData
+mutable struct MapData
     bounds::Bounds{LLA}
     nodes::Dict{Int,ENU}
     roadways::Array{Way,1}