diff --git a/FD/src/FD.jl b/FD/src/FD.jl
index 794a1ad1867a253527992dd7d34e47a88cfade05..072307cc6be2229ffcbe354703b03da1f268e267 100644
--- a/FD/src/FD.jl
+++ b/FD/src/FD.jl
@@ -1,10 +1,7 @@
 module FD
 
 using StaticArrays
-#using SparseArrays
 using OffsetArrays
-#using LinearMaps
-#using IterativeSolvers
 import Colors: Gray
 import Plots: plot
 
diff --git a/Manifest.toml b/Manifest.toml
index daf81537fb746db9bbeb250b044ff8e88cf00366..a9e8b92b0fbf5fa3663362b58a15811cdf900a0a 100644
--- a/Manifest.toml
+++ b/Manifest.toml
@@ -3,9 +3,9 @@ uuid = "2a0f44e3-6c83-55bd-87e4-b1978d98bd5f"
 
 [[ColorTypes]]
 deps = ["FixedPointNumbers", "Random", "Test"]
-git-tree-sha1 = "0e3209ba7418aed732e5c3818076b4400ee36c08"
+git-tree-sha1 = "f73b0e10f2a5756de7019818a41654686da06b09"
 uuid = "3da002f7-5984-5a60-b8a6-cbb66c0b333f"
-version = "0.7.4"
+version = "0.7.5"
 
 [[Colors]]
 deps = ["ColorTypes", "FixedPointNumbers", "InteractiveUtils", "Pkg", "Printf", "Reexport", "Test"]
@@ -15,9 +15,9 @@ version = "0.9.4"
 
 [[Compat]]
 deps = ["Base64", "Dates", "DelimitedFiles", "Distributed", "InteractiveUtils", "LibGit2", "Libdl", "LinearAlgebra", "Markdown", "Mmap", "Pkg", "Printf", "REPL", "Random", "Serialization", "SharedArrays", "Sockets", "SparseArrays", "Statistics", "Test", "UUIDs", "Unicode"]
-git-tree-sha1 = "ae262fa91da6a74e8937add6b613f58cd56cdad4"
+git-tree-sha1 = "ff2595695fc4f14427358ce2593f867085c45dcb"
 uuid = "34da2185-b29b-5c13-b0c7-acf172513d20"
-version = "1.1.0"
+version = "1.2.0"
 
 [[Contour]]
 deps = ["LinearAlgebra", "StaticArrays", "Test"]
@@ -26,10 +26,10 @@ uuid = "d38c429a-6771-53c6-b99e-75d170b6e991"
 version = "0.5.1"
 
 [[DataStructures]]
-deps = ["InteractiveUtils", "REPL", "Random", "Serialization", "Test"]
-git-tree-sha1 = "5162c360c52e9265e0bfafb71415c31f746f7e04"
+deps = ["InteractiveUtils", "OrderedCollections", "REPL", "Random", "Serialization", "Test"]
+git-tree-sha1 = "8fc6e166e24fda04b2b648d4260cdad241788c54"
 uuid = "864edb3b-99cc-5e75-8d2d-829cb0a9cfe8"
-version = "0.12.0"
+version = "0.14.0"
 
 [[Dates]]
 deps = ["Printf"]
@@ -96,9 +96,9 @@ version = "0.3.0"
 
 [[Missings]]
 deps = ["Dates", "InteractiveUtils", "SparseArrays", "Test"]
-git-tree-sha1 = "196528fa1df03df435025f52f9c1ff8356f94738"
+git-tree-sha1 = "adc26d2ee85a49c413464110d922cf21efc9d233"
 uuid = "e1d29d7a-bbdc-5cf2-9ac0-f12de2c33e28"
-version = "0.3.0"
+version = "0.3.1"
 
 [[Mmap]]
 uuid = "a63ad114-7e13-5084-954f-fe012c677804"
@@ -115,6 +115,12 @@ git-tree-sha1 = "f8cd140824f74f2948ff8660bc2292e16d29c1b7"
 uuid = "6fe1bfb0-de20-5000-8ca7-80f57d26f881"
 version = "0.8.1"
 
+[[OrderedCollections]]
+deps = ["Pkg", "Random", "Serialization", "Test"]
+git-tree-sha1 = "85619a3f3e17bb4761fe1b1fd47f0e979f964d5b"
+uuid = "bac558e1-5e72-5ebc-8fee-abe8a469f55d"
+version = "1.0.2"
+
 [[Pkg]]
 deps = ["Dates", "LibGit2", "Markdown", "Printf", "REPL", "Random", "SHA", "UUIDs"]
 uuid = "44cfe95a-1eb2-52ea-b672-e2afdf69b78f"
@@ -133,9 +139,9 @@ version = "0.5.4"
 
 [[Plots]]
 deps = ["Base64", "Contour", "Dates", "FixedPointNumbers", "GR", "JSON", "LinearAlgebra", "Measures", "NaNMath", "Pkg", "PlotThemes", "PlotUtils", "Printf", "Random", "RecipesBase", "Reexport", "Requires", "Showoff", "SparseArrays", "StaticArrays", "Statistics", "StatsBase", "Test", "UUIDs"]
-git-tree-sha1 = "fa4f80b7e2173b8605353bdadf10d3ee8569efc6"
+git-tree-sha1 = "437b77558cc7f24883bd4c4fe25a240304402ffd"
 uuid = "91a5bcdd-55d7-5caf-9e0b-520d859cae80"
-version = "0.20.2"
+version = "0.20.5"
 
 [[Printf]]
 deps = ["Unicode"]