diff --git a/Project.toml b/Project.toml
index bfacdd4..2a4408a 100644
--- a/Project.toml
+++ b/Project.toml
@@ -11,7 +11,7 @@ Transducers = "28d57a85-8fef-5791-bfe6-a80928e7c999"
 
 [compat]
 InitialValues = "0.2"
-Setfield = "0.5, 0.6"
+Setfield = "0.5, 0.6, 0.7"
 Tables = "1.0"
 Transducers = "0.4.33"
 julia = "1"
diff --git a/docs/Manifest.toml b/docs/Manifest.toml
index ad86f1f..fc584ef 100644
--- a/docs/Manifest.toml
+++ b/docs/Manifest.toml
@@ -7,11 +7,11 @@ version = "2.0.0"
 
 [[BangBang]]
 deps = ["Compat", "ConstructionBase", "Future", "InitialValues", "LinearAlgebra", "Requires", "Setfield", "Tables", "ZygoteRules"]
-git-tree-sha1 = "886ad3a8b339762fb5684e962dc89215a6859f6a"
+git-tree-sha1 = "f42321255afc37da855b6cd9f2a1fc36c017ceee"
 repo-rev = "master"
 repo-url = "https://github.com/JuliaFolds/BangBang.jl.git"
 uuid = "198e06fe-97b7-11e9-32a5-e1d131e6ad66"
-version = "0.3.27"
+version = "0.3.29"
 
 [[Base64]]
 uuid = "2a0f44e3-6c83-55bd-87e4-b1978d98bd5f"
@@ -52,6 +52,11 @@ version = "1.0.0"
 deps = ["Printf"]
 uuid = "ade2ca70-3891-5945-98fb-dc099432e06a"
 
+[[DefineSingletons]]
+git-tree-sha1 = "1a356f194281dff9ef1119faa9125a0d4e210729"
+uuid = "244e2a9f-e319-4986-a169-4d1fe445cd52"
+version = "0.1.0"
+
 [[DelimitedFiles]]
 deps = ["Mmap"]
 uuid = "8bb1440f-4735-579b-a4ab-409b98df4dab"
@@ -77,11 +82,12 @@ deps = ["Random"]
 uuid = "9fa8497b-333b-5362-9e8d-4d0656e87820"
 
 [[InitialValues]]
-git-tree-sha1 = "f3458faa269a6edefb2c329c26fdc829771c993b"
+deps = ["Pkg"]
+git-tree-sha1 = "e8dbe594d2dabcf66d7cd04a315553b067da5e04"
 repo-rev = "master"
 repo-url = "https://github.com/JuliaFolds/InitialValues.jl.git"
 uuid = "22cec73e-a1b8-11e9-2c92-598750a2cf9c"
-version = "0.2.7"
+version = "0.2.8"
 
 [[InteractiveUtils]]
 deps = ["Markdown"]
@@ -161,9 +167,9 @@ uuid = "9e88b42a-f829-5b0c-bbe9-9e923198166b"
 
 [[Setfield]]
 deps = ["ConstructionBase", "Future", "MacroTools", "Requires"]
-git-tree-sha1 = "7a151f918819326a6003dba451dabe65f8c0f6fb"
+git-tree-sha1 = "d5640fc570fb1b6c54512f0bd3853866bd298b3e"
 uuid = "efcf1570-3423-57d1-acb7-fd33fddbac46"
-version = "0.6.0"
+version = "0.7.0"
 
 [[SharedArrays]]
 deps = ["Distributed", "Mmap", "Random", "Serialization"]
@@ -203,12 +209,12 @@ deps = ["Distributed", "InteractiveUtils", "Logging", "Random"]
 uuid = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
 
 [[Transducers]]
-deps = ["ArgCheck", "BangBang", "CompositionsBase", "Distributed", "InitialValues", "Logging", "Markdown", "Requires", "Setfield", "SplittablesBase", "Tables"]
-git-tree-sha1 = "329e69f3104057ae0aaab823c447bd7d5aae1d8b"
+deps = ["ArgCheck", "BangBang", "CompositionsBase", "DefineSingletons", "Distributed", "InitialValues", "Logging", "Markdown", "Requires", "Setfield", "SplittablesBase", "Tables"]
+git-tree-sha1 = "d9bfa17064d3ea0da8213aa315d55cb8c84b60db"
 repo-rev = "master"
 repo-url = "https://github.com/JuliaFolds/Transducers.jl.git"
 uuid = "28d57a85-8fef-5791-bfe6-a80928e7c999"
-version = "0.4.39"
+version = "0.4.41-DEV"
 
 [[UUIDs]]
 deps = ["Random", "SHA"]
diff --git a/test/environments/main/Manifest.toml b/test/environments/main/Manifest.toml
index f4e8919..0dc4731 100644
--- a/test/environments/main/Manifest.toml
+++ b/test/environments/main/Manifest.toml
@@ -7,11 +7,11 @@ version = "2.0.0"
 
 [[BangBang]]
 deps = ["Compat", "ConstructionBase", "Future", "InitialValues", "LinearAlgebra", "Requires", "Setfield", "Tables", "ZygoteRules"]
-git-tree-sha1 = "0c21563543c8f819315dc898f9e4d7059a80b84c"
+git-tree-sha1 = "f42321255afc37da855b6cd9f2a1fc36c017ceee"
 repo-rev = "master"
 repo-url = "https://github.com/JuliaFolds/BangBang.jl.git"
 uuid = "198e06fe-97b7-11e9-32a5-e1d131e6ad66"
-version = "0.3.28-DEV"
+version = "0.3.29"
 
 [[Base64]]
 uuid = "2a0f44e3-6c83-55bd-87e4-b1978d98bd5f"
@@ -52,6 +52,11 @@ version = "1.0.0"
 deps = ["Printf"]
 uuid = "ade2ca70-3891-5945-98fb-dc099432e06a"
 
+[[DefineSingletons]]
+git-tree-sha1 = "1a356f194281dff9ef1119faa9125a0d4e210729"
+uuid = "244e2a9f-e319-4986-a169-4d1fe445cd52"
+version = "0.1.0"
+
 [[DelimitedFiles]]
 deps = ["Mmap"]
 uuid = "8bb1440f-4735-579b-a4ab-409b98df4dab"
@@ -77,11 +82,12 @@ deps = ["Random"]
 uuid = "9fa8497b-333b-5362-9e8d-4d0656e87820"
 
 [[InitialValues]]
-git-tree-sha1 = "7b16627136e5af30a43109eb7286d13921623b64"
+deps = ["Pkg"]
+git-tree-sha1 = "e8dbe594d2dabcf66d7cd04a315553b067da5e04"
 repo-rev = "master"
 repo-url = "https://github.com/JuliaFolds/InitialValues.jl.git"
 uuid = "22cec73e-a1b8-11e9-2c92-598750a2cf9c"
-version = "0.2.8-DEV"
+version = "0.2.8"
 
 [[InteractiveUtils]]
 deps = ["Markdown"]
@@ -161,9 +167,9 @@ uuid = "9e88b42a-f829-5b0c-bbe9-9e923198166b"
 
 [[Setfield]]
 deps = ["ConstructionBase", "Future", "MacroTools", "Requires"]
-git-tree-sha1 = "7a151f918819326a6003dba451dabe65f8c0f6fb"
+git-tree-sha1 = "d5640fc570fb1b6c54512f0bd3853866bd298b3e"
 uuid = "efcf1570-3423-57d1-acb7-fd33fddbac46"
-version = "0.6.0"
+version = "0.7.0"
 
 [[SharedArrays]]
 deps = ["Distributed", "Mmap", "Random", "Serialization"]
@@ -203,12 +209,12 @@ deps = ["Distributed", "InteractiveUtils", "Logging", "Random"]
 uuid = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
 
 [[Transducers]]
-deps = ["ArgCheck", "BangBang", "CompositionsBase", "Distributed", "InitialValues", "Logging", "Markdown", "Requires", "Setfield", "SplittablesBase", "Tables"]
-git-tree-sha1 = "329e69f3104057ae0aaab823c447bd7d5aae1d8b"
+deps = ["ArgCheck", "BangBang", "CompositionsBase", "DefineSingletons", "Distributed", "InitialValues", "Logging", "Markdown", "Requires", "Setfield", "SplittablesBase", "Tables"]
+git-tree-sha1 = "d9bfa17064d3ea0da8213aa315d55cb8c84b60db"
 repo-rev = "master"
 repo-url = "https://github.com/JuliaFolds/Transducers.jl.git"
 uuid = "28d57a85-8fef-5791-bfe6-a80928e7c999"
-version = "0.4.39"
+version = "0.4.41-DEV"
 
 [[UUIDs]]
 deps = ["Random", "SHA"]