diff --git a/Project.toml b/Project.toml
index 422956b8..1ebcb1bf 100644
--- a/Project.toml
+++ b/Project.toml
@@ -5,6 +5,7 @@ authors = ["Xiaoyan Li <xiaoyan.lyu.li@gmail.com>"]
 version = "0.1.0"
 
 [deps]
+AlgebraicRewriting = "725a01d3-f174-5bbd-84e1-b9417bad95d9"
 Catlab = "134e5e36-593f-5add-ad60-77f754baafbe"
 Combinatorics = "861a8166-3701-5b0c-9a16-15d98fcdc6aa"
 CompTime = "0fb5dd42-039a-4ca4-a1d7-89a96eae6d39"
@@ -23,7 +24,8 @@ Tables = "bd369af6-aec1-5ad0-b16a-f7cc5008161c"
 Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
 
 [compat]
-Catlab = "0.15"
+AlgebraicRewriting = "≥ 0.2.1"
+Catlab = "≥ 0.15.5"
 Combinatorics = "1.0.2"
 CompTime = "0.1"
 GraphViz = "0.2"
diff --git a/src/SystemStructure.jl b/src/SystemStructure.jl
index 9a6f7e09..417599fb 100644
--- a/src/SystemStructure.jl
+++ b/src/SystemStructure.jl
@@ -6,6 +6,7 @@ flattenTupleNames(sn::Tuple)=Symbol(foldr(string,map(x->string(x), sn)))
 flattenTupleNames(sn::Symbol)=sn
 flattenTupleNames(sn::SubArray{Symbol})=sn
 flattenTupleNames(sn::SubArray)=map(y->Symbol(foldr(string,map(x->string(x), y))),sn)
+flattenTupleNames(sn::Vector)=[flattenTupleNames(x) for x in sn]
 
 
 function extracStocksStructureAndFlatten(p::AbstractStockAndFlowStructure)