diff --git a/Cargo.toml b/Cargo.toml
index d3f348a..765ab39 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -8,6 +8,7 @@ members = [
   "nac3artiq",
   "runkernel",
 ]
+resolver = "2"
 
 [profile.release]
 debug = true
diff --git a/nac3artiq/Cargo.toml b/nac3artiq/Cargo.toml
index c290c04..edbde85 100644
--- a/nac3artiq/Cargo.toml
+++ b/nac3artiq/Cargo.toml
@@ -2,7 +2,7 @@
 name = "nac3artiq"
 version = "0.1.0"
 authors = ["M-Labs"]
-edition = "2018"
+edition = "2021"
 
 [lib]
 name = "nac3artiq"
diff --git a/nac3ast/Cargo.toml b/nac3ast/Cargo.toml
index 2ac4544..1dd4ca8 100644
--- a/nac3ast/Cargo.toml
+++ b/nac3ast/Cargo.toml
@@ -2,7 +2,7 @@
 name = "nac3ast"
 version = "0.1.0"
 authors = ["RustPython Team", "M-Labs"]
-edition = "2018"
+edition = "2021"
 
 [features]
 default = ["constant-optimization", "fold"]
diff --git a/nac3core/Cargo.toml b/nac3core/Cargo.toml
index 1b6478d..1bed6b7 100644
--- a/nac3core/Cargo.toml
+++ b/nac3core/Cargo.toml
@@ -2,7 +2,7 @@
 name = "nac3core"
 version = "0.1.0"
 authors = ["M-Labs"]
-edition = "2018"
+edition = "2021"
 
 [dependencies]
 itertools = "0.11"
diff --git a/nac3ld/Cargo.toml b/nac3ld/Cargo.toml
index 7509b3c..670c3e0 100644
--- a/nac3ld/Cargo.toml
+++ b/nac3ld/Cargo.toml
@@ -2,7 +2,7 @@
 name = "nac3ld"
 version = "0.1.0"
 authors = ["M-Labs"]
-edition = "2018"
+edition = "2021"
 
 [dependencies]
 byteorder = { version = "1.4", default-features = false }
diff --git a/nac3parser/Cargo.toml b/nac3parser/Cargo.toml
index e6c96c7..6ccdc38 100644
--- a/nac3parser/Cargo.toml
+++ b/nac3parser/Cargo.toml
@@ -5,7 +5,7 @@ description = "Parser for python code."
 authors = [ "RustPython Team", "M-Labs" ]
 build = "build.rs"
 license = "MIT"
-edition = "2018"
+edition = "2021"
 
 [build-dependencies]
 lalrpop = "0.20"
diff --git a/nac3standalone/Cargo.toml b/nac3standalone/Cargo.toml
index d6d6ebf..a2d1855 100644
--- a/nac3standalone/Cargo.toml
+++ b/nac3standalone/Cargo.toml
@@ -2,7 +2,7 @@
 name = "nac3standalone"
 version = "0.1.0"
 authors = ["M-Labs"]
-edition = "2018"
+edition = "2021"
 
 [dependencies]
 parking_lot = "0.12"
diff --git a/runkernel/Cargo.toml b/runkernel/Cargo.toml
index 54cf6bb..9f3de28 100644
--- a/runkernel/Cargo.toml
+++ b/runkernel/Cargo.toml
@@ -2,7 +2,7 @@
 name = "runkernel"
 version = "0.1.0"
 authors = ["M-Labs"]
-edition = "2018"
+edition = "2021"
 
 [dependencies]
 libloading = "0.8"